Journal of the Australian Ceramic Society最新文献

{"title":"Synthesis, morphology investigation and electrical conduction mechanism of rubidium yttrium diphosphate","authors":"Souad Chkoundali,&nbsp;Hanen Ghoudi,&nbsp;Samia Aydi,&nbsp;Abderrazek Oueslati,&nbsp;Abdelhedi Aydi","doi":"10.1007/s41779-024-01138-z","DOIUrl":"10.1007/s41779-024-01138-z","url":null,"abstract":"<div><p>The rubidium yttrium diphosphate compoundwas synthesized by solid route. The characteristics of this compound have been determined using X-ray powder diffraction, morphological, Raman and complex impedance spectroscopy. While X-ray powder diffraction revealed that RbYP₂O₇ compound crystallizes in the monoclinic system (P2₁/c space group), the SEM mapping demonstrated that the particles have the shape of squares of different sizes and demonstrate that the mean crystalline size of the specimen is 1.75 μm. The complex impedance spectra analysis indicated that the electrical features of the compound are largely dependent on temperature and frequency. Two semi circles are detectable in the Nyquist plots of the complex impedance spectra, suggesting the contribution of the effects of the grain and grain boundary. Non-Debye type relaxation mechanism coupled with negative temperature coefficient of resistance (NTCR) behaviour was indicated by temperature dependent impedance spectroscopy. Additionally, the AC conductivity frequency dependence was interpreted in terms of Jonscher’s law, whereas DC conductivity promotes the polaron assisted hopping in RbYP₂O₇ composition having activation energies of the grain σ_g and grain boundary are Ea_g= 0.81 eV and Ea_gb = 1.21 eV, respectively. The power law exponent (s) yielded that the correlated barrier hopping (CBH) model corresponds to the dominant transport process in this material. Furthermore, the multiple relaxation process was revealed by the modulus spectroscopy dominated by the mixed Rb⁺ cation motion within the investigated material structure.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1101 - 1112"},"PeriodicalIF":2.1,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161613","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}

{"title":"Parameters influencing the characteristics of the nano-bonded aluminosilicate based refractory castables","authors":"Shirin Khanmohammadi,&nbsp;Masoomeh Mohtadinia","doi":"10.1007/s41779-024-01139-y","DOIUrl":"10.1007/s41779-024-01139-y","url":null,"abstract":"<div><p>Replacing calcium aluminate cement as hydraulic binder by silica sol as sol-gel binder for refractory castables is known to reduce drawbacks of hydraulic binders but still comprehensive information regarding the effect of various raw materials and additives are required. In this research bauxite, andalusite and argellite were chosen as aluminosilicate aggregates and silica sol as binder and the effect of citric acid, micro silica and cement as setting agent were investigated for different compositions. Mechanical strength of the obtained castables at different temperatures of 110, 1000 and 1400°C were probed for various compositions. Finally based on the maximum mechanical strength of 342.5 and 241 Kg/cm² at 110°C, workability and flowability of the castables, optimum compositions were selected. The used amounts of citric acid, micro silica and cement for bauxite optimized composition were 0.04%, 2% and 1% while there were 0.02%, 0% and 1%, respectively for andalusite based one. The effect of sol-gel binder on the corrosion resistance of the optimized compositions was investigated in contact with molten sodium silicate using static cup test. Bauxite based castables showed mechanical strength higher than andalusite ones, while the later exhibited better corrosion resistance which related to the intrinsic characteristics of the used aggregates.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"21 - 29"},"PeriodicalIF":2.1,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121413","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}

{"title":"Spark plasma sintering of B4C-TiB2 composite: Effect of combustion synthesized nanoparticle on sinterability and mechanical properties","authors":"Ozan Coban,&nbsp;Mehmet Bugdayci,&nbsp;Salih Çagri Ozer,&nbsp;Serkan Baslayici,&nbsp;Servet Turan,&nbsp;M. Ercan Acma","doi":"10.1007/s41779-024-01113-8","DOIUrl":"10.1007/s41779-024-01113-8","url":null,"abstract":"<div><p>This study investigated the effects of fine particles with high surface area synthesized by Self-propagating High-Temperature Synthesis (SHS) on the SPS process and the properties of the resulting products. Correlations were established between particle size, SHS product addition, sinterability, and mechanical properties. The products were characterized by measuring shrinkage percentages, relative density, microhardness, elastic modulus, and fracture toughness, which were further correlated with SEM–EDS results. The results revealed that SHS nanoparticles significantly increased fracture toughness, especially with additions above 60%, by reducing average particle size, increasing powder porosity, and adding composite powder. The product exhibited high relative density (99.03%), elastic modulus (464 GPa), and fracture toughness (4.65 MPa.m^1/2) when SPS was used on B₄C-TiB₂ powders containing 80% SHS product at a low temperature of 1550 °C. By adding 80% SHS product, hardness increased by 62% (19.5 GPa) and fracture toughness by 24%, even at low sintering temperatures, thus reducing energy consumption.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"937 - 951"},"PeriodicalIF":2.1,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161198","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}

{"title":"Magnetic and luminescence properties of bioactive glass nanoparticles for biomedical applications","authors":"Fatma Unal,&nbsp;Batur Ercan","doi":"10.1007/s41779-024-01141-4","DOIUrl":"10.1007/s41779-024-01141-4","url":null,"abstract":"<div><p>This study explores the synthesis and characterization of superparamagnetic iron oxide nanoparticles (SPIONs) coated with zinc (Zn) and/or europium (Eu) doped bioactive glass. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) confirmed spherical agglomerated morphology and core@shell structure, respectively. High-Resolution TEM (HR-TEM) revealed lattice fringe values consistent with the cubic magnetite phase. Magnetic property assessment showed stable superparamagnetic behavior with slight reductions in saturation magnetization (σ_s) after immersion in simulated body fluid (SBF) solution. Photoluminescence (PL) spectra of Eu-doped samples exhibited red emission, confirming Eu rare earth element incorporation and maintaining luminescence post-immersion in SBF. Upon the interaction with SBF, hydroxyapatite (HA) formation occurred on the nanoparticle surfaces, suggesting the bioactive nature of the nanoparticles. These findings suggest that the synthesized nanoparticles exhibit promising potential for biomedical applications, including imaging, and orthopedics, due to their bioactive, magnetic, and luminescent properties.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"301 - 310"},"PeriodicalIF":2.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122505","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}

{"title":"Texture induced superhydrophilic ceramic surfaces with hybrid structures","authors":"Gokhan Acikbas","doi":"10.1007/s41779-024-01140-5","DOIUrl":"10.1007/s41779-024-01140-5","url":null,"abstract":"<div><p>There are two primary methods for creating superhydrophilic surfaces: applying photochemically active chemicals as coatings or creating a textured surface. Texture-induced superhydrophilic surfaces have a further advantage of being stable and without requiring radiation. The creation of texture on the surface mostly depends on the chemical composition and firing conditions. Therefore, this study aims to assess the influence of alterations in glaze composition and firing cycle on crystal phase development, microstructure, contact angle, surface roughness, and specific surface energy in nano ZnO/ZnO-Cu included glazes. In this sense, glaze formulations comprising 7.8% nano zinc oxide / 7.8% nano zinc oxide, and 0.780% nano copper, with industrial glaze, were developed. Glazed samples were sintered at 1210 °C and underwent heat treatment at 965 °C for periods of 8 and 32 h. The surfaces of the samples were examined utilizing scanning electron microscopy, X-ray diffraction, surface profilometry, and wetting angle goniometry. As a result, superhydrophilic surfaces was obtained with the formation of multi-layer structures consisting of micro-sized willemite islands at the bottom and on top of well crystalized smaller (around 1 micron in size) willemite grains and at the top nano spherical shape plagioclase granular structures. After 8 h of heat treatment, the surface achieves its maximum superhydrophilic state with a contact angle of 5◦. The superhydrophilicity was caused by the nano crystalline plagioclase granules’ surface architecture, not its chemical composition.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"311 - 320"},"PeriodicalIF":2.1,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122442","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}

{"title":"Investigation low-temperature densification and dielectric properties of glass/Al2O3/nano-TiO2 ceramics for microwave applications","authors":"Oğuzhan Bilaç","doi":"10.1007/s41779-024-01136-1","DOIUrl":"10.1007/s41779-024-01136-1","url":null,"abstract":"<div><p>A commercial SiO₂-Al₂O₃-CaO-based commercial glass, Al₂O₃, and nano-TiO₂ were used as initial materials. Glass/Al₂O₃/TiO₂ samples were fabricated using the uniaxial dry pressing method, using C55 with 15 wt% TiO₂, 23 wt% TiO₂ and 36 wt% TiO₂. The optimum bulk density temperature for the C55 was 800 ˚C, for the C55-15 T was 900 ˚C, for the C55-23 T was 900 ˚C, for the C55-36 T was 1000 ˚C. TiO₂ neither chemically reacted with the other phases nor decomposed with temperature which was critical to increasing the dielectric constant. The C55-36 T sample was highlighted for its low sintering temperature of 1000 °C, high dielectric constant values (18.92 at 5 MHz, 17.40 at 1 GHz, and 17.03 at 10 GHz), low dielectric loss (0.0058 at 5 MHz, 0.0063 at 1 GHz, and 0.0075 at 10 GHz), as well as a near-zero temperature coefficient (1.7 ppm/°C) along with high mechanical properties.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"711 - 718"},"PeriodicalIF":1.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892701","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}

{"title":"Understanding the processing of mullite-based ceramics from kaolin waste: a cautionary note on the inadvertent use of split-plot designs","authors":"Rivaildo M. Andrade,&nbsp;Allan J. M. Araújo,&nbsp;Rafael A. Raimundo,&nbsp;Ricardo P. S. Dutra,&nbsp;Liszandra F. A. Campos,&nbsp;Carla A. Vivacqua,&nbsp;André L. S. Pinho,&nbsp;Daniel A. Macedo","doi":"10.1007/s41779-024-01126-3","DOIUrl":"10.1007/s41779-024-01126-3","url":null,"abstract":"<div><p>Experimentation plays an important role in ceramic science and engineering, which involves the design of new products, development of new manufacturing processes, and also the optimization of processing. In this work, a cautionary note on the inadvertent use of split-plot designs was presented to understand the processing of mullite-based ceramics from kaolin waste. Samples were obtained by solid-state reactive sintering of kaolin waste following a 2² × 2 full factorial split-plot design. The influence of firing temperature, time and applied pressing pressure on the physical properties was evaluated. The structural and microstructural analyses of fired samples were evaluated by X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM). Kaolin waste processed ceramics at 1400 ºC consist of elongated mullite crystals uniformly embedded into a glassy phase and minor amounts of quartz. Statistical models were constructed for open porosity and density at 1% level of significance. The estimated <i>P</i>-values indicate that the coefficients associated with the applied pressing pressure and its interaction with firing temperature and time (<span>(:gamma:)</span> and <span>(:{delta:}_{1})</span>) were statistically significant for open porosity and density. The higher applied pressing pressure leads to lower open porosity. The densification process was influenced by different sintering mechanisms depending on temperature (solid phase sintering vs. liquid phase sintering). The lack of harmony between the planning and the execution of the experiment does not allow the testing of the main effects of firing temperature, time and the interaction between them (β₁, β₂ and β₃). Understanding the proper way to plan, execute and analyze experiments are of urgent interest in the field of ceramic processing, and that is the key message of this paper.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"699 - 710"},"PeriodicalIF":1.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892700","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}

{"title":"Dry and wet sliding, fatigue, creep and mechanical properties of AA-7475 metal matrix composite reinforced with Si2N2O from rice husk ash","authors":"K. Pratheesh,&nbsp;Seeniappan Kaliappan,&nbsp;L. Natrayan,&nbsp;V. P. Arthanarieswaran","doi":"10.1007/s41779-024-01131-6","DOIUrl":"10.1007/s41779-024-01131-6","url":null,"abstract":"<div><p>This study extensively explores the mechanical performance of AA7475 metal matrix composites reinforced with heat-treated Si2N2O sourced from rice husk ash. The specimens were meticulously fabricated using the stir casting method, ensuring a homogeneous dispersion of Si2N2O particles within the AA7475 matrix. The characterization of these specimens followed ASTM standards, encompassing evaluations of dry and wet sliding behavior, fatigue strength, creep resistance, and overall mechanical properties.Among the various specimens, the AAR3 designation emerged as the most promising, showcasing exceptional mechanical properties. AAR3 exhibited a remarkable tensile strength of 569 MPa, accompanied by a reduced elongation of 8%, yield strength of 264 MPa, and impact energy of 24.15 J. The increased rigidity attributed to the 6wt% Si2N2O particles in AAR3 also led to an improved hardness of 164.The trend of enhanced mechanical strength extended to fatigue properties, with AAR2 delivering a notable fatigue strength of 329 MPa. In terms of wear resistance, AAR3 stood out with impressive results, featuring a specific wear rate of 0.0075 mm³/Nm and a coefficient of friction (COF) of 0.44 for dry sliding wear. For wet sliding wear, AAR3 demonstrated a specific wear rate of 0.0047 mm³/Nm and a COF of 0.42.In the realm of creep properties, AAR3 exhibited reduced creep strain values of 0.01824, 0.0233, 0.0934, 0.2004, and 0.3505 for time intervals of 2000, 4000, 6000, 8000, and 10,000 s, respectively. These findings collectively emphasize the superior mechanical and tribological performance of AAR3, underlining the potential of heat-treated Si2N2O reinforcement for enhancing the properties of AA7475 metal matrix composites.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1069 - 1080"},"PeriodicalIF":2.1,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167275","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}

{"title":"Microstructure and performances of MoN/CrMoN bi-layer coatings","authors":"Chih-Fu Yang,&nbsp;Chih-Chung Hu,&nbsp;Chih-Tsung Chang,&nbsp;Chun-Chih Hsu,&nbsp;Kun-Yuan Lin,&nbsp;Chun-Yao Hsu","doi":"10.1007/s41779-024-01124-5","DOIUrl":"10.1007/s41779-024-01124-5","url":null,"abstract":"<div><p>This study utilized direct current (DC) magnetron sputtering to produce a MoN/CrMoN bi-layer film. The impact of the MoN buffer layer thickness, varying Mo DC power, and substrate plasma etching pre-treatment on the structural and mechanical properties of MoN/CrMoN bi-layer films was investigated. With fixed CrMoN film deposition parameters an increase in the thickness of the MoN buffer layer led to a reduction in the grain size of the MoN/CrMoN bi-layer film and an enhancement in the surface hardness of the film coating. Fixed MoN buffer, Cr DC power and change the Mo DC power, the results show that as the Mo power increases, the crystal position of the (111) crystal plane diffraction peak of the MoN/CrMoN bi-layer film shifted to a higher angle along with changes in internal stress. Substrates pre-treated by plasma etching showed increased surface roughness, hydrophilic tendency, and good film coating adhesion. By increasing the plasma etching power of the substrate pre-treated, the MoN/ZrMoN bi-layer film has better mechanical properties. The H, E, H/E ratio H³/E² ratio, <i>R</i>e, and the coefficient of friction of the MoN/CrMoN bi-layer films are 14.59 GPa, 144.8 GPa, 0.101, 0.148, 65.2%, and 0.39, respectively.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1027 - 1039"},"PeriodicalIF":2.1,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166181","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}

{"title":"A review, zirconia based dental materials","authors":"Merve Nezir,&nbsp;Suat Özcan,&nbsp;Aykan Onur Atilla,&nbsp;Zafer Evis","doi":"10.1007/s41779-024-01134-3","DOIUrl":"10.1007/s41779-024-01134-3","url":null,"abstract":"<div><p>In dentistry, increasing aesthetic expectations and technological developments have increased the use of different materials that are biologically compatible, tooth-colored, and have mechanical properties provided by the metal infrastructure, as an alternative to the metal-supported ceramic restorations that have been used for a long time. Nowadays, the use of full ceramic restorations in prosthetic dental treatments has become quite common. Zirconia is a frequently used ceramic material due to its high mechanical properties. Especially in fixed prosthetic treatment applications, it can be used as the infrastructure material of tooth and implant supported crown and bridge prostheses or as one-piece full anatomical prosthetic restorations, as the primers of telescope systems, as post and/or core, as the implant abutment and the implant itself. Nowadays, it is possible to produce zirconia restorations with computer-aided design-computer-aided manufacturing (CAD/CAM) method and three-dimensional (3D) printers. In this review, the compositional properties, production methods, structural, mechanical and optical properties of zirconia-based dental materials and their use in dental applications are reviewed in the light of current literature information.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"235 - 249"},"PeriodicalIF":2.1,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121983","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}