Journal of the Australian Ceramic Society最新文献

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Synthesis of Zn-BaTiO3 and fabrication of flexible Zn-BaTiO3/PVDF nanocomposites for piezoelectric applications zno - batio3的合成及柔性压电纳米复合材料的制备
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-16 DOI: 10.1007/s41779-025-01206-y
S. Kaviyarasu, M. Satthiyaraju, K. M. Govindaraju
{"title":"Synthesis of Zn-BaTiO3 and fabrication of flexible Zn-BaTiO3/PVDF nanocomposites for piezoelectric applications","authors":"S. Kaviyarasu,&nbsp;M. Satthiyaraju,&nbsp;K. M. Govindaraju","doi":"10.1007/s41779-025-01206-y","DOIUrl":"10.1007/s41779-025-01206-y","url":null,"abstract":"<div><p>The development of piezoelectric nanogenerators (PENGs) using Zn doped barium titanate (Zn-BaTiO<b>₃</b>) within polyvinylidene fluoride (PVDF) matrices has shown significant potential for energy harvesting applications. This study was focused on the synthesis of Zn-BaTiO<b>₃</b> through sol–gel route and fabrication of Zn-BaTiO<b>₃</b>/PVDF nanocomposites via., solvent casting techniques. The effects of various doping levels were investigated through XRD, FT-IR, FESEM techniques based on their shape and morphology of Zn-BaTiO<b>₃</b> and Zn-BaTiO<b>₃</b>/PVDF nanocomposites. Raman spectroscopy and Photoluminescence spectra were used to confirm the doping of Zn and defect states present in the Zn-BaTiO<sub>3</sub>. The fabricated nanocomposites were also successfully characterized using TGA and DSC to confirm the thermal stability and phase transformation. The presence of defect states was confirmed by decreased emission intensities at 420 to 480 nm, which corresponds to the defect-mediated transitions. The influence of Zn-BaTiO<b>₃</b> in PVDF matrix was proved by the improvement of dielectric permittivity and piezoelectric response of the fabricated nanocomposites. The PVDF with 2wt% of Zn-BaTiO<sub>3</sub> is shows an enhanced output voltage of 1472 mV which is 1.56 times higher than pure PVDF and it would be a promising candidate for advanced piezoelectric nanogenerators, capable of efficiently converting mechanical energy into electrical energy for powering low power electronic devices.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1743 - 1755"},"PeriodicalIF":2.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Valorization of low-quality recycled concrete aggregates in cement-based systems through carbonation: assessment of engineering performance 低质量再生混凝土骨料在水泥基体系中通过碳化的增值:工程性能的评估
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-14 DOI: 10.1007/s41779-025-01208-w
Burak Dundar, Merve Sonmez Tugluca, Huseyin Ilcan, Oguzhan Sahin, Mustafa Sahmaran
{"title":"Valorization of low-quality recycled concrete aggregates in cement-based systems through carbonation: assessment of engineering performance","authors":"Burak Dundar,&nbsp;Merve Sonmez Tugluca,&nbsp;Huseyin Ilcan,&nbsp;Oguzhan Sahin,&nbsp;Mustafa Sahmaran","doi":"10.1007/s41779-025-01208-w","DOIUrl":"10.1007/s41779-025-01208-w","url":null,"abstract":"<div><p>With the continuous rise in construction and demolition waste (CDW) generation and the increasing demand for sustainable construction materials, this study aims to explore the potential of utilizing recycled concrete aggregate (RCA)—the most abundant component of CDW—as a replacement for natural aggregate (NA). Mortar samples incorporating untreated recycled fine aggregate (RFA), natural fine aggregate (NFA), and carbonated RFA (CRFA) were produced to determine whether the mechanical and durability drawbacks of RFA can be mitigated through accelerated carbonation. In this context, the workability, mechanical strength, water absorption capacity, capillary water absorption behavior, freeze–thaw and chloride permeability properties of the mortars were analyzed. The results indicate that the negative impact of RFA on engineering properties can be significantly reduced through accelerated carbonation. Despite all aggregates being in a saturated surface dry state, RFA exhibited the lowest flowability, while NFA had the highest. In strength tests, CRFA-containing mortars achieved performance levels comparable to those with NA. However, RFA mixtures demonstrated considerably higher water absorption and permeability than NA, while CRFA improved these properties. Additionally, RFA mortars experienced greater weight loss during freeze–thaw cycles, but carbonation treatment helped mitigate this deterioration. These findings highlight the potential of accelerated carbonation treatment as an effective method for upgrading RCAs, contributing to more sustainable construction practices.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1769 - 1784"},"PeriodicalIF":2.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-025-01208-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-scale retina enhancement paired with weighted homomorphic filtering as a combined picture improvement technique for Si3N4 bearing roller microcrack weak texture feature 多尺度视网膜增强与加权同态滤波相结合的Si3N4轴承滚子微裂纹弱纹理特征图像改进技术
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-13 DOI: 10.1007/s41779-025-01200-4
Tao Chen, Xin Xia, Hui Yang, Jianbo Le, Weiwen Hu, Nanxing Wu
{"title":"Multi-scale retina enhancement paired with weighted homomorphic filtering as a combined picture improvement technique for Si3N4 bearing roller microcrack weak texture feature","authors":"Tao Chen,&nbsp;Xin Xia,&nbsp;Hui Yang,&nbsp;Jianbo Le,&nbsp;Weiwen Hu,&nbsp;Nanxing Wu","doi":"10.1007/s41779-025-01200-4","DOIUrl":"10.1007/s41779-025-01200-4","url":null,"abstract":"<div><p>Multi-scale retinal enhancement and weighted homomorphic filtering algorithms are proposed to address the problems of weak texture features, unclear detail information, and uneven and low contrast of feature regions in Si<sub>3</sub>N<sub>4</sub> bearing roller images. Combined with the weak texture characteristics of Si<sub>3</sub>N<sub>4</sub>-bearing roller microcracks, this creates the multi-channel convolution equation for retinal color recovery. Break down the characteristics of an image into information across various scales and boost the contrast of the texture's less prominent features. Based on the different gray value components of different frequencies of the feature image, distinct gray value components exist according to the feature image's various frequencies. Set up the Gaussian difference equation, extend local grayscale values, and realize noise removal of texture features`. The average PSNR of the optimized microcrack weak texture feature image is 21.4556 dB, as per the results. By comparing the experiments, the image entropy is improved by 23.8% on average, which effectively enhances the roller microcrack contrast and details of the texture feature image, improves the accuracy and quality of feature images.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1651 - 1661"},"PeriodicalIF":2.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the complete extraction method of ancient ceramic texture features 古陶瓷纹理特征的完整提取方法研究
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-11 DOI: 10.1007/s41779-025-01192-1
Guanbiao Li, Miao Mei, Xiaoxue Zhang, Weiwen Hu, Changfu Fang, Dahai Liao
{"title":"Study on the complete extraction method of ancient ceramic texture features","authors":"Guanbiao Li,&nbsp;Miao Mei,&nbsp;Xiaoxue Zhang,&nbsp;Weiwen Hu,&nbsp;Changfu Fang,&nbsp;Dahai Liao","doi":"10.1007/s41779-025-01192-1","DOIUrl":"10.1007/s41779-025-01192-1","url":null,"abstract":"<div><p>To address the problems such as background noise and uneven illumination during the extraction of ancient ceramic patterns. A nondestructive extraction method for missing patterns in ancient ceramics is proposed. Combined with the characteristics of the pattern, the median filter matrix equation is designed to denoise the image. By defining the median filter equation function for the high-frequency approximation coefficient of the wavelet transform, the details of the ancient ceramic pattern are clearer. The double histogram equalization algorithm is built to maintain the average brightness of the image, which is helpful to the extraction and analysis. The verification shows that the method can effectively eliminate the interference of noise on the extraction of the ancient ceramic pattern, and the accuracy of the segmentation reaches 94%. It effectively promotes the restoration and protection of ancient ceramic cultural relics.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 4","pages":"1557 - 1569"},"PeriodicalIF":2.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evolution of mechanical properties and microstructure of high alumina porcelain insulators with sintering temperature 高铝瓷绝缘子力学性能和显微组织随烧结温度的变化
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-08 DOI: 10.1007/s41779-025-01203-1
Yonggang Yue, Lanjun Yang, Xiaochuan Chong, Donghai Ding, Guoqing Xiao
{"title":"Evolution of mechanical properties and microstructure of high alumina porcelain insulators with sintering temperature","authors":"Yonggang Yue,&nbsp;Lanjun Yang,&nbsp;Xiaochuan Chong,&nbsp;Donghai Ding,&nbsp;Guoqing Xiao","doi":"10.1007/s41779-025-01203-1","DOIUrl":"10.1007/s41779-025-01203-1","url":null,"abstract":"<div><p>To explore the effect of sintering temperature on the mechanical properties and clarify the relationship between their microstructure and properties of porcelain insulators, the green body of porcelain insulators were prepared by dry moulding and sintered at different temperatures. The effect of sintering temperature on bulk density, apparent porosity, water absorption, linear shrinkage, compressive strength and bending strength of the insulators were investigated. The phase composition and microstructure of the sintered specimens were obtained to explain the essential reasons for changes in mechanical properties. The results showed that the apparent porosity and water absorption decrease first and then increase with the increase of sintering temperature, and the compressive strength and bending strength increase first and then decrease with the increase of sintering temperature. The sample sintered at 1280 °C exhibited the optimum overall properties, with the lowest apparent porosity and water absorption of 0.43% and 0.15%, the highest compressive strength and bending strength of 434.1 MPa and 110.8 MPa, respectively. The reinforcing effect caused by the interlocking bonding network formed by the in-situ generated rod-shaped mullite are the key factors in improving the mechanical properties.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1695 - 1704"},"PeriodicalIF":2.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of spray dried silver-copper co-doped β-tricalcium phosphate particles 喷雾干燥银铜共掺杂β-磷酸三钙颗粒的研制
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-05-06 DOI: 10.1007/s41779-025-01201-3
Henni Setia Ningsih, Bramantyo Bayu Aji, Meng-Huang Wu, Shao-Ju Shih
{"title":"Development of spray dried silver-copper co-doped β-tricalcium phosphate particles","authors":"Henni Setia Ningsih,&nbsp;Bramantyo Bayu Aji,&nbsp;Meng-Huang Wu,&nbsp;Shao-Ju Shih","doi":"10.1007/s41779-025-01201-3","DOIUrl":"10.1007/s41779-025-01201-3","url":null,"abstract":"<div><p>Β-tricalcium phosphate (β-TCP) is preferred among of the calcium phosphate family member owing to its resorbility for bone related implant materials. In addition to this feature, antibacterial and low cytotoxicity attributes are necessary to mitigate the risk of infection caused by bacteria and minimize the rejection rate from the body. Silver (Ag) and Copper (Cu) are two metals that have been extensively utilized since ancient times to suppress microbial growth. β-TCP powders with dopant of the Ag, Cu and Ag/Cu co-doped were prepared with spray pyrolysis (SP). A series of X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM) were employed to analyze the crystalline phase, morphology, and elemental composition of un-doped, Ag-doped, Cu-doped and Ag/Cu co-doped β-TCP samples. From the results showed, all prepared powders have a spherical shape with metals distributed homogenously on the β-TCP. This confirms the effective synthesis of dopant Ag and Cu to β-TCP by the SP method. Furthermore, at lower concentrations, the antibacterial efficacy of 2.9 mol% Ag/2.9 mol% Cu co-doped β-TC is equal to 5.8% mol Ag-doped and demonstrated higher cell viability, indicating a favorable influence of the co-doping technique on improving the bioactivity of β-TCP.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1663 - 1680"},"PeriodicalIF":2.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-025-01201-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of pyrocatechol on the computational, structural, spectroscopic and thermal properties of silver-modified hydroxyapatite 邻苯二酚对银修饰羟基磷灰石的计算、结构、光谱和热性能的影响
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-04-29 DOI: 10.1007/s41779-025-01202-2
Serhat Keser, Aykut Yıldız, Azeez A. Barzinjy, Rebaz Obaid Kareem, Bahroz Kareem Mahmood, Riyadh Saeed Agid, Tankut Ates, Mehmet Mürşit Temüz, Suleyman Koytepe, Turan İnce, Omer Kaygili, Józef E. Sienkiewicz, Patryk Jasik, Niyazi Bulut
{"title":"Effects of pyrocatechol on the computational, structural, spectroscopic and thermal properties of silver-modified hydroxyapatite","authors":"Serhat Keser,&nbsp;Aykut Yıldız,&nbsp;Azeez A. Barzinjy,&nbsp;Rebaz Obaid Kareem,&nbsp;Bahroz Kareem Mahmood,&nbsp;Riyadh Saeed Agid,&nbsp;Tankut Ates,&nbsp;Mehmet Mürşit Temüz,&nbsp;Suleyman Koytepe,&nbsp;Turan İnce,&nbsp;Omer Kaygili,&nbsp;Józef E. Sienkiewicz,&nbsp;Patryk Jasik,&nbsp;Niyazi Bulut","doi":"10.1007/s41779-025-01202-2","DOIUrl":"10.1007/s41779-025-01202-2","url":null,"abstract":"<div><p>This study investigates the synthesis and characterization of hydroxyapatite (HAp) ceramic biomaterials doped with silver (Ag) and pyrocatechol. HAp, commonly utilized in the treatment of hard tissues including teeth and bones, was produced and analyzed to assess the structural, morphological, elemental, and thermal properties of the materials. The phase and crystal structures of the synthesized HAp biomaterials were examined using X-ray diffraction (XRD), revealing that the incorporation of Ag and pyrocatechol influenced the crystallinity and lattice parameters. Fourier transform infrared (FT-IR) spectroscopy verified the presence of the characteristic OH- and PO<sub>4</sub>³⁻ groups of HAp, while scanning electron microscopy (SEM) displayed consistent morphologies across all samples, free of residues or impurities. Elemental compositions were determined by energy dispersive X-ray (EDX) spectroscopy, and thermal stability was assessed through differential thermal analysis (DTA) and thermogravimetric analysis (TGA). Additionally, computational studies using density functional theory (DFT) were conducted to further investigate the electronic and structural properties of 0.44% Ag-doped HAp. The DFT calculations revealed that Ag atoms replace calcium (Ca1 and Ca2) positions in the lattice, leading to slight distortions in the lattice structure and changes in the electronic density distribution. Minor changes were observed in the band structure and electronic properties, indicating the stability and tunability of the doped system. A small amount of β-tricalcium phosphate (β-TCP) phase was also detected alongside the main HAp phase. These results underscore the importance of incorporating pyrocatechol and silver doping into HAp for biomedical applications. The resulting biomaterials exhibit enhanced structural, thermal, and electronic properties, with improved biocompatibility and antimicrobial activity.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1681 - 1694"},"PeriodicalIF":2.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-025-01202-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finite element simulation of the thermal shock resistance of cordierite-mullite kiln furniture 堇青石-莫来石窑具抗热震性能的有限元模拟
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-04-25 DOI: 10.1007/s41779-025-01199-8
Le Ma, Hongfeng Yin, Yuchi Liu, Yun Tang, Yalou Xin, Xiaohu Ren, Hudie Yuan
{"title":"Finite element simulation of the thermal shock resistance of cordierite-mullite kiln furniture","authors":"Le Ma,&nbsp;Hongfeng Yin,&nbsp;Yuchi Liu,&nbsp;Yun Tang,&nbsp;Yalou Xin,&nbsp;Xiaohu Ren,&nbsp;Hudie Yuan","doi":"10.1007/s41779-025-01199-8","DOIUrl":"10.1007/s41779-025-01199-8","url":null,"abstract":"<div><p>Cordierite-mullite kiln furniture for lepidolite calcination was prepared from cordierite, M45 mullite, and clay with the addition of potassium feldspar fines. The effects of potassium feldspar content and firing temperature on phase composition, microstructure, mechanical properties, and thermal shock resistance were investigated. The findings indicate that the incorporation of potassium feldspar enhances the liquid phase content in the samples without significantly altering the phase compositions, thereby facilitating the densification of the materials. In combination with the thermodynamic calculations and the results of the finite element simulation, it is evident that the stresses within the cordierite-mullite system result in less damage to the samples and exhibit a lower degree of stress concentration in the aggregate compared to the mullite-cordierite system. The porous structure of the cordierite aggregate, combined with stress concentration, leads to the formation of microscopic cracks that redirect crack propagation and consume additional fracture energy as the cracks extend. Consequently, cordierite-mullite kiln furniture exhibits a fracture strength of 16.5 MPa and a retention rate of 92.7% following thermal shock.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1639 - 1650"},"PeriodicalIF":2.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced piezoelectric properties in high-TC Bi5Ti3FeO15 via dysprosium substitution: a rare-earth doping approach for superior performance 通过镝取代增强高tc Bi5Ti3FeO15的压电性能:一种性能优越的稀土掺杂方法
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-04-18 DOI: 10.1007/s41779-025-01193-0
Hui-Lin Li, Yi-Nuo Chen, Qian Wang, En-Meng Liang, Yi-Jun Wan, Xin-Yu Yu, Zhi-Qiang Li, Xian Zhao, Chun-Ming Wang
{"title":"Enhanced piezoelectric properties in high-TC Bi5Ti3FeO15 via dysprosium substitution: a rare-earth doping approach for superior performance","authors":"Hui-Lin Li,&nbsp;Yi-Nuo Chen,&nbsp;Qian Wang,&nbsp;En-Meng Liang,&nbsp;Yi-Jun Wan,&nbsp;Xin-Yu Yu,&nbsp;Zhi-Qiang Li,&nbsp;Xian Zhao,&nbsp;Chun-Ming Wang","doi":"10.1007/s41779-025-01193-0","DOIUrl":"10.1007/s41779-025-01193-0","url":null,"abstract":"<div><p>The development of iron-containing Aurivillius-phase bismuth layer-structured ferroelectrics (BLSFs) has garnered considerable attention due to their unique multiferroic properties, characterized by the coexistence of ferroelectric and magnetic ordering. Among these materials, bismuth titanate-ferrite (Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub>) stands out as a prominent candidate for high-temperature piezoelectric applications, given its elevated Curie temperature (<i>T</i><sub>C</sub>) of 760 °C. Despite its potential, the practical utilization of Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> in high-temperature piezoelectric devices is limited by low resistance at elevated temperatures and poor piezoelectric performance. To address these issues, we explored a composition optimization strategy involving the partial substitution of bismuth ions with rare-earth dysprosium (Dy) ions to enhance piezoelectric performance and direct-current (DC) electrical resistivity of Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub>. This substitution aims to mitigate the volatility of bismuth ions and stabilize the (Bi<sub>2</sub>O<sub>2</sub>)<sup>2+</sup> layer, thereby reducing oxygen vacancy concentration. We successfully synthesized Bi<sub>5-<i>x</i></sub>Dy<sub><i>x</i></sub>Ti<sub>3</sub>FeO<sub>15</sub> (BTF-100<i>x</i>Dy) oxide compounds using a solid-state reaction method. Our experimental results demonstrate that dysprosium-substituted Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> exhibits markedly enhanced piezoelectric performance compared to the unmodified Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub>. Specifically, the BTF-5Dy composition achieved a significant increase in the piezoelectric constant (<i>d</i><sub>33</sub>) to 23.1 pC/N, which is approximately three times higher than that of the unmodified Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> (7.1 pC/N). The temperature-dependent measurements of DC electrical resistivity revealed that dysprosium substitution substantially improves the material’s electrical resistivity at elevated temperatures. Additionally, BTF-5Dy exhibited a high <i>T</i><sub>C</sub> of 787 °C, a low dielectric loss tan<i>δ</i> (~ 0.38% at 1 MHz), and good thermal stability of electromechanical properties up to 300 °C. These improvements are attributed to lattice distortion and reduced oxygen vacancies. Collectively, these findings suggest that dysprosium-substituted Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> ceramics hold great promise as high-performance materials for high-temperature piezoelectric applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 4","pages":"1571 - 1582"},"PeriodicalIF":2.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of the effects of alkaline activators and sand type on the properties of calcined zeolite-based geopolymer 碱性活化剂及砂型对煅烧沸石基地聚合物性能影响的研究
IF 2.1 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2025-04-17 DOI: 10.1007/s41779-025-01196-x
Ferhat Helvacı, Gökhan Görhan
{"title":"Investigation of the effects of alkaline activators and sand type on the properties of calcined zeolite-based geopolymer","authors":"Ferhat Helvacı,&nbsp;Gökhan Görhan","doi":"10.1007/s41779-025-01196-x","DOIUrl":"10.1007/s41779-025-01196-x","url":null,"abstract":"<div><p>This study examines the effects of sand type on the properties of the calcined zeolite-based geopolymer mortars. The geopolymer mortars were prepared using different sand types, standard and crushed, in different ratios. The zeolite calcined at 600 <sup>o</sup>C was used for the alumina silicate resource. The sodium hydroxide at 4 M, 8 M, and 12 M and sodium silicate solutions with 2Ms and 3Ms were used for the alkaline activation process. Using a vibrating table, the prepared geopolymer mortar samples were placed in a 40 × 40 × 160 mm metallic mold. The samples were then cured in the oven at 90 <sup>o</sup>C for 6 h. According to the results, the geopolymer mortars’ apparent porosity and water absorption values varied depending on the NaOH molarity and the sand used in the mixtures. The apparent porosity and water absorption rates varied in between 11.85 − 25.54% and 7.02 − 16.51%, respectively. Considering the data obtained from the geopolymer mortars activated with different NaOH molarities and SS solutions, the flexural strengths are between 0.93 MPa − 4.0 MPa, and compressive strength values are 3.39 MPa − 12.54 MPa. The highest flexural (4 MPa) and compressive strength (12.54 MPa) were obtained in the CS40 samples. As a result, the increased amount of crushed sand content increases the strength values.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 5","pages":"1901 - 1919"},"PeriodicalIF":2.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-025-01196-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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