{"title":"Introduction of new Editor-in-Chief: Prof. Amit Bandyopadhyay","authors":"Amit Bandyopadhyay","doi":"10.1111/ijac.15162","DOIUrl":"https://doi.org/10.1111/ijac.15162","url":null,"abstract":"","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197165","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}
R. A. Shishkin, I. Yu. Komolikov, V. M. Skachkov, I. O. Yurev, V. D. Zhuravlev
{"title":"Effect of basalt aids on the thermal stability and mechanical properties of zircon composites produced by slip casting","authors":"R. A. Shishkin, I. Yu. Komolikov, V. M. Skachkov, I. O. Yurev, V. D. Zhuravlev","doi":"10.1111/ijac.15151","DOIUrl":"https://doi.org/10.1111/ijac.15151","url":null,"abstract":"<p>This study explores the feasibility of producing cost-effective zircon–basalt composite ceramics using slip casting method. Zircon is effectively stabilized by basalt up to 1550°C, preventing its decomposition; however, challenges such as gas release and partial melting during sintering result in increased porosity and reduced mechanical strength. Thermal analysis, including thermogravimetric and differential thermal measurements, identified a stepwise mass loss in basalt beginning 600°C, attributed to the sublimation of chlorine- or fluorine-containing compounds. Visual thermal analysis determined a melting point of 1300°C ± 50°C for basalt. Scanning electron microscopy revealed pore formation from gas release and the presence of zircon grains within an anorthite matrix. Microhardness increased with both basalt content and sintering temperature, while flexural strength showed an inverse relationship, highlighting the negative impact of porosity. These findings demonstrate the complex interaction between composition, processing parameters, and microstructure in determining the mechanical properties of zircon–basalt composites. To mitigate the challenges of gas release and porosity, further optimization could involve refining the sintering parameters, such as lowering the heating rate or introducing additional additives to trap volatile species, thereby improving the material's densification and mechanical integrity.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197651","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":"Temperature-stable BaLiF3 microwave ceramics for LTCC applications with the addition of SrTiO3 and LiF","authors":"H. Zheng, L. M. Huang, J. J. Bian","doi":"10.1111/ijac.15153","DOIUrl":"https://doi.org/10.1111/ijac.15153","url":null,"abstract":"<p>Although BaLiF<sub>3</sub> ceramic has a high quality-factor at microwave frequencies (<i>Q ×</i> <i>f</i> value = ∼83000 GHz) coupled with a low sintering temperature (750°C/2 h), its high negative temperature coefficient of resonant frequency (<i>τ</i><sub>f</sub> = ∼ −70 ppm/°C) prevents practical applications. In the present paper, we employed SrTiO<sub>3</sub> as a second phase (7 mol%) to tune the negative <i>τ</i><sub>f</sub> value to near zero (∼2.5 ppm/°C) and added a small amount of LiF (4 mol%) to reduce the sintering temperature to ∼800°C. Sintering in the N<sub>2</sub> atmosphere has a beneficial effect on the density, while it has a detrimental impact on the <i>Q ×</i> <i>f</i> value of the sintered body due to the partial reduction of Ti<sup>4+</sup> in the SrTiO<sub>3</sub> (SrTi<sup>4+</sup><sub>1-</sub><i><sub>x</sub></i>Ti<sup>3+</sup><i><sub>x</sub></i>O<sub>3-</sub><i><sub>x</sub></i>F<i><sub>x</sub></i>) and F-vacancies in the BaLiF<sub>3</sub> (BaLiF<sub>3-x</sub>)<sub>.</sub> The 0.93BaLiF<sub>3</sub> +0.07SrTiO<sub>3</sub> composite with 4 mol% LiF addition exhibits excellent combined microwave dielectric properties (<i>ε</i><sub>r</sub><i><sub> </sub></i>= 14, <i>Q ×</i> <i>f </i>= 55 000 GHz, and τ<i><sub>f </sub></i>= −3 ppm/°C), coupled with low sintering temperature (785°C/3 h) and good cofiring chemical compatibility with silver, which is a promising candidate for LTCC applications.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197652","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":"Study on synthesis of MgAl2O4 spinel materials from alumina titania slag and light-burned magnesia","authors":"G. Z. Ruan, Z. H. Zhang, L. Q. Zhang","doi":"10.1111/ijac.15149","DOIUrl":"https://doi.org/10.1111/ijac.15149","url":null,"abstract":"<p>Alumina titania slag (It is an industrial waste generated during the preparation of iron titanium alloys by aluminum thermal reduction method.) and light-burned magnesia were used as raw materials to prepare MgAl<sub>2</sub>O<sub>4</sub> spinel at 1400–1600°C. Particularly, the effect of the mass ratio of alumina titania slag and light-burned magnesia on the synthesis and densification of MgAl<sub>2</sub>O<sub>4</sub> spinel was studied. The mass ratio of alumina titania slag and light-burned magnesia was adjusted to 100:29, 100:35, 100:41, and 100:47. Alumina titania slag was mixed with light-burned magnesia according to above mass ratio, respectively, and pressed into billets diameter of 20 mm and height of 15 mm. The green-body billets then were sintered at 1400–1600°C in an air atmosphere. Bulk density, apparent porosity, phase composition, and microstructure of final sintered products were analyzed. The results indicated that MgAl<sub>2</sub>O<sub>4</sub> spinel could be prepared by solid reaction of alumina titania slag and light-burned magnesia. With the increasing magnesia content, the bulk density of samples and lattice parameters of MgAl<sub>2</sub>O<sub>4</sub> spinel increased, while apparent porosity of samples decreased. At the same time, the higher magnesia content, the more MgAl<sub>2</sub>O<sub>4</sub> spinel particles with obvious structure appeared and grew large.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197563","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}
He Lu, Yuhou Wu, Zijin Liu, Tongxiang Zheng, Jiancheng Guo
{"title":"Regulation of Ag atom diffusion in CrAlN-Ag coatings based on diffusion mechanism","authors":"He Lu, Yuhou Wu, Zijin Liu, Tongxiang Zheng, Jiancheng Guo","doi":"10.1111/ijac.15150","DOIUrl":"https://doi.org/10.1111/ijac.15150","url":null,"abstract":"<p>The diffusion of solute atoms at grain boundaries significantly impacts material properties. This study employed magnetron sputtering to prepare CrAlN-Ag coatings on silicon nitride substrates. Comprehensive characterization was conducted on the surface and cross-sectional morphologies of the coatings, as well as the concentration distribution of Ag elements along the coating depth direction. The diffusion mechanism of Ag atoms at the Σ5(012)[100] grain boundary and CrAlN(100) surface was analyzed using ab initio calculations. Based on this understanding, the distribution of Ag elements in the coatings was regulated. The results indicate that the Ag nanoparticles on the coating surface originate from the migration of Ag atoms from within a 260 nm depth range of the coating. The energy barrier for Ag atoms migrating along grain boundaries is .98 eV, suggesting that grain boundaries serve as rapid pathways for Ag atoms migrating toward the surface. Additionally, vacancy defects at grain boundaries and surfaces create energy traps that restrict the free diffusion of Ag atoms. Based on this mechanism, the stoichiometric deviation of N elements in the coatings was regulated. For the coatings after regulation, the size of surface Ag particles decreased, and the mechanical properties and wear resistance were improved.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197604","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":"Reaction bonding of oxide/oxide ceramic matrix composites using aluminum nitride as an alumina precursor","authors":"Fucai Yang, Xinqiang Cao, Yang Liu, Wenfeng Qiu","doi":"10.1111/ijac.15145","DOIUrl":"https://doi.org/10.1111/ijac.15145","url":null,"abstract":"<p>The reaction bonding technique offers a promising approach for controlling matrix sintering shrinkage in oxide/oxide ceramic matrix composites (OCMCs), thereby reducing the sintering cracks and enhancing mechanical properties. In this study, aluminum nitride (AlN) was used as an alumina precursor to fabricate OCMCs via reaction bonding. The results indicated that the mechanical properties of the OCMCs could be greatly improved due to the volume expansion induced by AlN oxidation, which reduced sintering cracks, and the high sintering activity of AlN, which enhanced the particle bonding strength in the matrix. However, the strong bonding between the matrix and fibers, attributed to the high sintering activity of AlN, resulted in the decrease of toughness. These findings confirm that the reaction bonding can effectively improve the mechanical properties of OCMCs, but careful control of matrix-fiber bonding is essential to optimize overall performance.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197096","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":"High-entropy boride ceramic cutting tools by SPS-HF dual sintering: Preparation process, composition, and properties","authors":"Yan Sun, Hui Chen, Jingjie Zhang, Guangchun Xiao, Mingdong Yi, Zhaoqiang Chen, Xianglong Meng, Yangyang Hu, Chonghai Xu","doi":"10.1111/ijac.15130","DOIUrl":"https://doi.org/10.1111/ijac.15130","url":null,"abstract":"<p>High-entropy boride (HEB) ceramics demonstrate significant potential for cutting tool applications, yet conventional synthesis methods face challenges in achieving full densification and optimal mechanical performance. (Mo<sub>0.2</sub>Zr<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>Ti<sub>0.2</sub>)B<sub>2</sub> HEB ceramics were prepared using the spark plasma sintering-high-frequency (SPS-HF) dual sintering method. The optimal mechanical properties of the HEB ceramic cutting tool materials were achieved at a sintering temperature of 1750°C. Compared with the HEB ceramic tool material without Al<sub>2</sub>O<sub>3</sub> (HEB0), the HEB ceramic tool material containing 3 wt% Al<sub>2</sub>O<sub>3</sub> (HEB3A) exhibited improved mechanical properties. The Vickers hardness and flexural strength of HEB3A were 20.07 GPa and 492.85 MPa, representing increases of 2.87% and 17.28%, respectively, compared to HEB0. The HEB3A tool achieved a cutting distance of 1000 m and a coefficient of friction of 0.62 during dry cutting tests on 45 steel, representing a 66.67% increase and an 11.29% reduction, respectively, compared to the HEB0 tool. The results indicate that the addition of Al<sub>2</sub>O<sub>3</sub> improves the cutting performance of HEB ceramic tools. This work shows that the HEB-based ceramics with high hardness, high toughness, and high flexural strength have potential applications in the field of cutting tools.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197166","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}
Mengmeng Wang, Binghua Tang, Jishi Du, Xiaojun Huang, Xudong Li, Feng Xie, Hu Chen, Lei Chen, Xiaodong Wang
{"title":"Effects of cold isostatic pressing parameters on mechanical and insulation performances of a 95.5 wt% alumina ceramic","authors":"Mengmeng Wang, Binghua Tang, Jishi Du, Xiaojun Huang, Xudong Li, Feng Xie, Hu Chen, Lei Chen, Xiaodong Wang","doi":"10.1111/ijac.15143","DOIUrl":"https://doi.org/10.1111/ijac.15143","url":null,"abstract":"<p>The effects of cold isostatic pressing (CIP) pressure on the sintering densification, the mechanical and insulation performances of a 95.5 wt% alumina ceramic are investigated. The density of sintered ceramic increases with the increase of CIP pressure, and tends to level off when the CIP pressure is higher than a suitable pressure (120 MPa). This is attributed to the effect of CIP pressure on the pore size. The fracture strengths of green body and sintered ceramic both increases linearly with the increase of densities, which can be explained by the weakest-link assumption of fracture that initiates from pores. For the sintered ceramics, the direct current (DC) dielectric breakdown strength (DBS) increases exponentially with density, while the alternating current (AC) DBS prepared under different pressures have no noticeable difference, and this may be attributed to it that the large pores can discharge under DC while cannot discharge under AC. This work can contribute to fabricating ceramics with excellent performances on the premise of reducing costs.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197095","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}
Muhammad Ismail, Karam Jabbour, Sedra Muqadas, Ali Junaid, Khadija Bibi, Nigarish Bano, Numair Ansari, Aboud Ahmed Awadh Bahajjaj, Sana Ijaz, Muhammad Shuaib Khan
{"title":"Fabrication of samarium oxide embedded carbon nanotubes electrocatalyst for oxygen evolution reaction","authors":"Muhammad Ismail, Karam Jabbour, Sedra Muqadas, Ali Junaid, Khadija Bibi, Nigarish Bano, Numair Ansari, Aboud Ahmed Awadh Bahajjaj, Sana Ijaz, Muhammad Shuaib Khan","doi":"10.1111/ijac.15146","DOIUrl":"https://doi.org/10.1111/ijac.15146","url":null,"abstract":"<p>The economically unfeasible electrochemical breakdown of water is linked to the production of materials with low overpotential using a simple method. The study demonstrates the fabrication and use of samarium oxide (Sm<sub>2</sub>O<sub>3</sub>) on carbon nanotubes (CNTs) as an effective and long-lasting electrocatalyst for oxygen evolution reaction (OER). X-ray diffraction analysis confirms fabrication of Sm<sub>2</sub>O<sub>3</sub> embedded CNTs (Sm<sub>2</sub>O<sub>3</sub>/CNTs) phases with 0.052 nm lattice strain, while scanning electron microscopy structural analysis shows a ball-like shape with 78 nm average particle size. The synthesized catalyst performs well, attaining a current density of 10 mA cm<sup>−2</sup> and having an onset potential of 1.33 V versus reversible hydrogen electrode (RHE). In contrast to Sm<sub>2</sub>O<sub>3</sub> and CNT, which exhibit higher overpotentials of 311 and 342 mV with corresponding Tafel slopes of 62 and 83 mV dec<sup>−1</sup>, respectively, Sm<sub>2</sub>O<sub>3</sub>‒CNT has a low Tafel slope of 38 mV dec<sup>−1</sup> and a lower overpotential of 276 mV. With a current density of more than 50 mA cm<sup>−2</sup>, the catalyst demonstrated remarkable stability over 180 h. The electrochemical impedance spectroscopy analysis attributed the robust ionic conductivity of K⁺ ions, their small hydration sphere, and reduced electrode impedance to their <i>R</i><sub>ct</sub> value of 3.4 Ω. The composite potential of CNTs and Sm<sub>2</sub>O<sub>3</sub> as a long-term and effective OER electrocatalysis substitute has been demonstrated through promising results.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197240","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":"Simulation and empirical equation for thermal stress in Al2O3/Si3N4 ceramic joints brazed to Kovar/Monel metal alloys","authors":"Sunita Khod, Mayank Goswami","doi":"10.1111/ijac.15141","DOIUrl":"https://doi.org/10.1111/ijac.15141","url":null,"abstract":"<p>This study presents a simulation methodology to choose the optimal material combination before constructing a ceramic‒metal composite joint. Two types of joint assemblies/structures designed with and without pores and eight material combinations are tested. The finite element discretization of the model is implemented using Abaqus. The effect of thermal stress is functionally evaluated by Von Mises Stress (VMS) and average volumetric stress as a decision parameter. The joint assembly with Al<sub>2</sub>O<sub>3</sub>/Ag‒Cu‒Ti/Kovar composite material is found to have a relatively larger limit to get fractured. The thermal strain rate for optimal material combination is 3.77 × 10<sup>−6</sup> K<sup>‒1</sup> (with pores) and 6.11 × 10<sup>−6</sup> K<sup>‒1</sup> (without pores), respectively. The porous joint structure's average thermal stress is (∼30%‒50%) lower than the non-porous joint structure. The analysis concludes that pores do not always deteriorate joint performance. An empirically fit equation is derived to estimate the VMS value for any pore's shape, size, location, porosity, and material properties. The equation can be used to predict the VMS value for any ceramic‒metal composite material combinations. An empirical linear equation is also derived to predict effective coefficient of thermal expansion as a function of microstructure (shape, size, location, and porosity) and material type (effective molecular mass).</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197256","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}