Ceramics International最新文献_第6页

Enhancement of dielectric constant in Sm:Zr co-doped HfO2 films synthesized by cost-effective method 用经济有效的方法合成的 Sm:Zr 共掺杂 HfO2 薄膜介电常数的提高

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.372

Sabhya, Dhananjaya Kekuda, Mohan Rao K

{"title":"Enhancement of dielectric constant in Sm:Zr co-doped HfO2 films synthesized by cost-effective method","authors":"Sabhya, Dhananjaya Kekuda, Mohan Rao K","doi":"10.1016/j.ceramint.2024.09.372","DOIUrl":"10.1016/j.ceramint.2024.09.372","url":null,"abstract":"<div><div>Sm, Zr co-doped HfO2 films were deposited on a p-type silicon wafer using a cost-effective spin coating method. The influence of Sm, Zr co-doping concentration variation on structural, compositional, morphological, and electrical properties was examined. The dominance of the orthorhombic phase (o-phase) in comparison to the monoclinic phase was noted to rise with the simultaneous increment of Sm doping concentration and decrement of Zr concentration. A decrease in oxygen vacancies was noted for all the Sm, Zr co-doped HfO2 films from XPS results. Nonporous and uniform distribution of grains was observed from Field Emission Scanning Electron Microscope (FESEM) and Atomic Force Microscopy (AFM) studies. Electrical studies of MOS capacitors based on Sm, Zr co-doped HfO2 films revealed a low leakage current. C-V studies exhibited an increment of dielectric constant and a decrement of interface trap densities. Further, to obtain insights into the microscopic features of Sm, Zr co-doped films, impedance and modulus studies have been performed. The obtained results imply the potential of tuning Sm, Zr co-doping concentrations in HfO2 towards stabilization of the orthorhombic phase and to enhance the dielectric constant of the films.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50271-50281"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

CO2 photoreduction using encapsulated potassium bismuth iodide (K3Bi2I9) perovskite in porous supports 利用多孔支撑物中的封装碘化铋钾 (K3Bi2I9) 包晶进行二氧化碳光致还原

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.434

Edith Luévano-Hipólito , Oscar L. Quintero-Lizárraga , Leticia M. Torres-Martínez

{"title":"CO2 photoreduction using encapsulated potassium bismuth iodide (K3Bi2I9) perovskite in porous supports","authors":"Edith Luévano-Hipólito , Oscar L. Quintero-Lizárraga , Leticia M. Torres-Martínez","doi":"10.1016/j.ceramint.2024.09.434","DOIUrl":"10.1016/j.ceramint.2024.09.434","url":null,"abstract":"<div><div>Lead-free halide perovskites (LFHP) are one of the most promising materials for CO2 photoreduction; however, their stability is an issue that must be solved to scale up the manufacturing. To overcome this limitation, this work proposes the encapsulation of LFHP of K3Bi2I9 in three inorganic supports based on aluminosilicates such as (i) geopolymer, (ii) tobermorite, and other based on (iii) magnesium oxychloride. These supports provide a porous structure and active sites to host the perovskite particles, which favor enhanced light absorption, stability, and their activity for CO2 reduction under visible light. The encapsulated perovskites exhibited activity to photoconvert CO2 into formic acid (HCOOH) with efficiencies up to 2500 μmol h−1 using the K3Bi2I9 host in geopolymer. This support provides stable polysialate-diloxo chains to encapsulate the perovskite, delayed the degradation in aqueous medium, and its activity was demonstrated during 16 h of continuous visible light irradiation. The good stability and efficiency for CO2 reduction was associated to the formation of K3Bi2I9/BiOI heterojunction that prevent the degradation of the structure and enhance the charge transfer between both semiconductors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50876-50883"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Surface grafting modification of BN significantly enhanced the thermal conductivity for epoxy resin 对 BN 进行表面接枝改性可显著提高环氧树脂的热导率

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.398

Lu Wu, Guozhi Jia

{"title":"Surface grafting modification of BN significantly enhanced the thermal conductivity for epoxy resin","authors":"Lu Wu, Guozhi Jia","doi":"10.1016/j.ceramint.2024.09.398","DOIUrl":"10.1016/j.ceramint.2024.09.398","url":null,"abstract":"<div><div>Boron nitride, as an excellent thermal conductive filler, has received widespread attention in the field of heat dissipation, and its interface thermal transport with organic matrix is a key issue for improving thermal conductivity. In this study, several typical modifiers are selected to modify boron nitride to improve its interfacial compatibility with epoxy resin. The composition of functional groups, crystal structure and factors affecting thermal conductivity of the modified boron nitride surface are systematically studied. The influence of main factors such as the structural characteristics of grafted molecules and the grafting functional groups on the construction of thermal conductivity channels was analyzed in detail. The results show that shorter chain length and fewer cross-linked branches are more conducive to phonon transport and propagation. The thermal conductivity of BN-KH570/EP composite at 26 wt% load reaches 1.52 W/m·K, which is 7.6 times that of pure epoxy resin. It also maintains good thermal stability at 600 °C, which provides a new idea for improving the interface interaction of boron nitride composites.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50526-50534"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Systematic exploration of properties, band gap energies and precise optical transition in ZnO–TeO2–P2O5–B2O3– Dy2O3–Sm2O3 glasses 对 ZnO-TeO2-P2O5-B2O3- Dy2O3-Sm2O3 玻璃的性质、带隙能和精确光学转变的系统探索

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.418

Ibrahim Bulus , Areej S. Alqarni

{"title":"Systematic exploration of properties, band gap energies and precise optical transition in ZnO–TeO2–P2O5–B2O3– Dy2O3–Sm2O3 glasses","authors":"Ibrahim Bulus , Areej S. Alqarni","doi":"10.1016/j.ceramint.2024.09.418","DOIUrl":"10.1016/j.ceramint.2024.09.418","url":null,"abstract":"<div><div>Herein, a fresh glass host with definite chemical composition of (49.0-x)B2O3-10P2O5-30TeO2-10ZnO-1Dy2O3-xSm2O3 (0.0 ≤ x ≤ 1.5, mol%) was made through melt-quenching method. The effects of B2O3/Sm2O3 swapping on the physical and optical properties of the as-produced glasses was analytically inspected. The glass densities, deduced via Archimedes rule, were observed to be increasing while the mol v ar volume decline. Besides, the absorption spectral data monitored at 300–1800 nm region was used to determined various optical parameters. Further, three legendary models including, Tauc's, ASF (absorption spectral fitting) and DASF (derivation of ASF) were employed for deducing the energy band gap together with refractive indices. Midst the aforesaid models, scrutiny from DASF publicized exact optical transition index, m <math><mrow><mo>≈</mo></mrow></math> 0.5, affirming direct band gap energy in the present glasses. Moreover, other relevant optical quantities had been explored. To sum up, the achieved results buttressed the efficacy of the present glasses in the field of optoelectronics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50738-50747"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effects of sintering temperature on the microstructure and mechanical properties of double-hard-phase TiB2–TiC cermets 烧结温度对双硬质 TiB2-TiC 金属陶瓷微观结构和机械性能的影响

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.428

Fenghua Luo , Meng Fan , Fengdan Xue , Meiyao Liu , Chen Wang , Zikai Wu , Kuangxin Luo , Ning Wu

{"title":"Effects of sintering temperature on the microstructure and mechanical properties of double-hard-phase TiB2–TiC cermets","authors":"Fenghua Luo , Meng Fan , Fengdan Xue , Meiyao Liu , Chen Wang , Zikai Wu , Kuangxin Luo , Ning Wu","doi":"10.1016/j.ceramint.2024.09.428","DOIUrl":"10.1016/j.ceramint.2024.09.428","url":null,"abstract":"<div><div>The mechanical properties and microstructure of double-hard-phase TiB2–25-wt.%-TiC–20-wt.%-CoNi cermets prepared at different temperatures were investigated by performing scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. The results showed that the transverse rupture strength, indentation fracture toughness, hardness, and relative density of the cermets reached the maximum values of 1654 MPa, 11.06 MPa m1/2, 90.1 HRA, and 99.42 %, respectively, when the sintering temperature was 1462 °C. Solid- and liquid-phase sintering occurred at temperatures below and above 1354.5 °C, respectively. The cermets were composed of TiB2, TiC, TiB, and CoNi phases when sintered at 1440 °C and below, but the TiB phase disappeared when sintered at 1462 °C and above. Both TiB2 core–(Ti, Co, Ni)B rim and TiC core–(Ti, Co, Ni)C rim structures appeared in cermets sintered at 1440 °C and above. In addition, a few TiC core–(Ti, W)C inner–(Ti, W, Co, Ni)C outer double rim structures were formed. A coherent interface was found between the (Ti, Co, Ni)B rim and TiB2 core. A thin CoNi amorphous metallic layer existed at the interface between the (Ti, Co, Ni)C rim and TiC core. In addition, amorphous CoNi was observed in the interfacial region between the CoNi binder and (Ti, Co, Ni)C rim phase and inside the CoNi binder phase. These multi-interface and core–rim structures resulted in excellent strength and toughness of the cermets.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50810-50820"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Novel and practical fabrication of pre-seasoned Y2O3 ceramics through surface modification 通过表面改性新颖实用地制造预调质 Y2O3 陶瓷

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.420

Kang-Bin Bae , Hae-Seong Jang , Se-Rin Min , Gyu-Sang Oh , Yoon-Suk Oh , In-Hwan Lee , Sung-Min Lee

{"title":"Novel and practical fabrication of pre-seasoned Y2O3 ceramics through surface modification","authors":"Kang-Bin Bae , Hae-Seong Jang , Se-Rin Min , Gyu-Sang Oh , Yoon-Suk Oh , In-Hwan Lee , Sung-Min Lee","doi":"10.1016/j.ceramint.2024.09.420","DOIUrl":"10.1016/j.ceramint.2024.09.420","url":null,"abstract":"<div><div>In the semiconductor industry, the long “seasoning” time required after the installation of new ceramic components in etching equipment restricts the wafer production efficiency. This study proposes a novel and practical method for the fabrication of pre-seasoned ceramics through surface modification of Y2O3 ceramics. Fluorine-containing reactive vapors were produced by utilizing NH4F as the source. Further, the formation of yttrium oxyfluoride layers on the surfaces of Y2O3 ceramics was demonstrated. The modified surface comprises a single-crystalline phase near the interface with the Y2O3 substrate. The change in the composition, crystalline nature of the modified layer, and orientation relationship with the substrate were examined via transmission electron microscopy. The kinetics of the surface modification were studied for the sintered Y2O3 bulk as well as for practical coatings such as plasma-sprayed or PVD coatings. The proposed surface modification approach can be used to fabricate pre-seasoned Y2O3 coatings, which can significantly benefit the semiconductor industry.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50757-50765"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The network former/modifier behavior of CuO in Na2O-P2O5 glasses Na2O-P2O5 玻璃中 CuO 的网络形成/调节行为

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.421

Aamir Bashir , Paramjyot Kumar Jha , Navneet Kaur Mattu , Santosh Kumar , K. Singh

{"title":"The network former/modifier behavior of CuO in Na2O-P2O5 glasses","authors":"Aamir Bashir , Paramjyot Kumar Jha , Navneet Kaur Mattu , Santosh Kumar , K. Singh","doi":"10.1016/j.ceramint.2024.09.421","DOIUrl":"10.1016/j.ceramint.2024.09.421","url":null,"abstract":"<div><div>This present study focus on the synthesis, characterization, and evaluation of the role of CuO in the physical, structural, and optical properties of 50P2O5-(55-x)Na2O-xCuO (x = 0, 1, 3, and 5 mol%) compositions. The synthesized samples are analysed using various techniques such as XRD, FTIR, Raman, and UV–Visible spectroscopy to check their potential for laser and nonlinear optical applications. The addition of CuO in place of Na2O, increases the density of the glasses, while the molar volume decreases except for the PNC-5 (5 mol%) samples. X-ray diffraction confirms the amorphous nature of the samples. FTIR and Raman spectra reveal the presence of metaphosphate (Q2) and pyrophosphate (Q1) structural units, indicating that the glass network becomes more polymerized as CuO is added up to 3 mol%. The optical band gap increases from 3.52 to 4.27 eV, while the refractive index decreases from 2.54 to 2.12 as the concentration of CuO increases up to 3 mol%. These observations, shows the dual behaviour of CuO i.e., network former (up to 3 mol%) and network modifier (above 3 mol%). These findings also suggest that the present glass material holds significant promises for applications in nonlinear optics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50766-50773"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Broadband near-infrared luminescence in garnet Y3Ga3ZnAO12 (A = Ge, Si):Cr3+ phosphors 石榴石 Y3Ga3ZnAO12（A = Ge，Si）：Cr3+ 荧光体中的宽带近红外发光特性

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.394

Jie Shen , Gen Li , Guowang Wu , Dixi Ke , Xi Li , Min Zeng , Yongming Hu , Haoshuang Gu , Yuebin Li

{"title":"Broadband near-infrared luminescence in garnet Y3Ga3ZnAO12 (A = Ge, Si):Cr3+ phosphors","authors":"Jie Shen , Gen Li , Guowang Wu , Dixi Ke , Xi Li , Min Zeng , Yongming Hu , Haoshuang Gu , Yuebin Li","doi":"10.1016/j.ceramint.2024.09.394","DOIUrl":"10.1016/j.ceramint.2024.09.394","url":null,"abstract":"<div><div>In this work, novel Cr3+-doped near-infrared phosphors Y3Ga(3-x)ZnAO12 (A = Ge, Si):xCr3+ were synthesized by the solid-phase reaction method. Their crystal structures and luminescence properties were studied. The excitation spectra of Y3Ga(3-x)ZnAO12 (A = Ge, Si):xCr3+ at 453 nm and 632 nm correspond to the Cr3+ spin-allowed d-d transitions 4A2g-4T1g (4 F) and 4A2g-4T2g (4 F), respectively. The near-infrared emission peak observed at 783 nm (FWHM ≈ 130 nm) is induced by the 4T2g-4A2g transitions of Cr3+. Additionally, the luminescence performance of Y3Ga(3-x)ZnAO12 (A = Ge, Si):xCr3+ phosphors were successfully enhanced by Si4+-Ge4+ ions substitution. The emitting intensities of Y3Ga3ZnGeO12:0.05Cr3+ and Y3Ga3ZnGe0.8Si0.2O12:0.05Cr3+ remain 56 % and 49 % at 423 K of their initial value at 298 K, respectively. The above results indicate that the excitation wavelengths of Y3Ga(3-x)ZnAO12 (A = Ge, Si):xCr3+ phosphors match well with commercial 460 nm blue light chips, suggesting their potential applications in medical imaging, night vision and non-destructive testing.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50233-50241"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A novel LiMg2P3O10 microwave dielectric ceramic for ultra-wideband dielectric resonant antenna applications 用于超宽带介质谐振腔天线的新型 LiMg2P3O10 微波介质陶瓷

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.401

Longxiang Jiang, Qianbiao Du, Linzhao Ma, Guo Tian, Hao Li

{"title":"A novel LiMg2P3O10 microwave dielectric ceramic for ultra-wideband dielectric resonant antenna applications","authors":"Longxiang Jiang, Qianbiao Du, Linzhao Ma, Guo Tian, Hao Li","doi":"10.1016/j.ceramint.2024.09.401","DOIUrl":"10.1016/j.ceramint.2024.09.401","url":null,"abstract":"<div><div>In pursuit of the objective of implementing fifth-generation communication technology, a LiMg2P3O10 microwave dielectric ceramic was developed in this study, and an ultra-wideband dielectric resonant antenna was fabricated. Rietveld refinement confirmed that the monoclinic crystal structure of LiMg2P3O10 ceramics is constituted of MgO6 octahedral chains and shared angle PO4 tetrahedra. The impact of chemical bond characteristics on properties was explored through P-V-L theory. The primary contributions to the intrinsic properties were investigated through infrared spectroscopy. The LiMg2P3O10 ceramics sintered at 830 °C were found to have the best microwave dielectric properties (εr = 6.16, Q × f = 33,573 GHz (at 15.538 GHz), and τf = −35.6 ppm/°C). A novel ultra-wideband dielectric resonant antenna with 53.7 % relative bandwidth, 6.53 dBi maximum gain and 81.7 % radiation efficiency was designed and fabricated. Its wide ultra-wideband characteristics makes it suitable for signal transmission in modern wireless communication systems.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50560-50568"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence mechanism of added low-melting glass powder on the properties of high-temperature organic composite coatings 添加低熔点玻璃粉对高温有机复合涂层性能的影响机理

IF 5.1 2区材料科学

Ceramics International Pub Date : 2024-10-01 DOI: 10.1016/j.ceramint.2024.09.430

Tongjun Zhao , Shasha Yang , Zehao Chen , Yao Du , Jinlong Wang , Minghui Chen , Shenglong Zhu , Fuhui Wang

{"title":"Influence mechanism of added low-melting glass powder on the properties of high-temperature organic composite coatings","authors":"Tongjun Zhao , Shasha Yang , Zehao Chen , Yao Du , Jinlong Wang , Minghui Chen , Shenglong Zhu , Fuhui Wang","doi":"10.1016/j.ceramint.2024.09.430","DOIUrl":"10.1016/j.ceramint.2024.09.430","url":null,"abstract":"<div><div>Two formulations of high-temperature organic composite coatings containing Al flakes, nano-TiO2 were designed and low-melting glass (LMG) powder was added to the second for comparison. The properties of two coatings before and after the heat exposure tests were investigated. At room temperature, the large particles of LMG powder shortened the diffusion path of corrosive medium and had low interface binding strength with Al flakes, which has a negative effect on the barrier properties and strength of the as-prepared coating. After exposed to 600 °C for 300 h, the binder—silicone-modified acrylic resin—decomposed into silica, releasing gaseous products and generating a large amount of cavities inside the coating. Barrier properties and strength of the coating without added LMG powder severely deteriorated. At high temperatures, LMG in the viscous flow state infiltrated into the surrounding cavities by capillary action, forming a glass network and leaving in-situ holes. These holes deteriorated the barrier properties of the coating. The glass network filled in the cavities increased the coating strength and had a barrier effect on the diffusion of corrosive medium.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50834-50845"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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