Stéphanie Jublot-Leclerc , Gabriel Bouhali , Antoine Combrisson , Florian Pallier , Ludovic Largeau , Aurélie Gentils
{"title":"Influence of initial microstructure on implantation-induced strain, damage and surface amorphization in AlN","authors":"Stéphanie Jublot-Leclerc , Gabriel Bouhali , Antoine Combrisson , Florian Pallier , Ludovic Largeau , Aurélie Gentils","doi":"10.1016/j.jeurceramsoc.2025.117627","DOIUrl":"10.1016/j.jeurceramsoc.2025.117627","url":null,"abstract":"<div><div>The effects of 1) crystalline quality, and 2) radiation-induced pre-existing damage, on the microstructural modifications induced by ion implantation into single crystalline AlN layers were investigated in dedicated experiments. The native dislocations do not have any visible effect on the microstructural changes induced by implantation when point defect recombination is important. They are however shown to considerably reduce the elastic strain, and thus the quantity of point defects, when implantation-induced extended defects are formed. Moreover, an experiment of He implantation performed at 550°C in a material previously damaged by Al implantation is shown to induce the amorphization of an extended surface layer in the material of lower crystalline quality only. This phenomenon apparently results from the combination of several factors, including the combined influence of native dislocations and of a dense network of extended defects created by pre-implantation on the migration and accumulation of point defects at the surface.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117627"},"PeriodicalIF":5.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321176","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}
{"title":"Optimal design and evaluation of direct ammonia SOFC based on defect-induced LaySr0.3Cr0.85Ni0.15O3-δ anode","authors":"Fulan Zhong , Yijie Gao , Yiting Jiang , Huihuang Fang , Yu Luo , Chongqi Chen , Qing Zhang , Lilong Jiang","doi":"10.1016/j.jeurceramsoc.2025.117622","DOIUrl":"10.1016/j.jeurceramsoc.2025.117622","url":null,"abstract":"<div><div>The development of the anode with high catalytic activity for ammonia (NH<sub>3</sub>) oxidation and compatible with electrolyte is of great significance for the commercial application of direct ammonia solid oxide fuel cells (NH<sub>3</sub>-SOFC). The work showed an enhancement of electrochemical performance by optimal design and molecular engineering insights into ammonia oxidation mechanism in depth. Sr-doped LaCr<sub>0.85</sub>Ni<sub>0.15</sub>O<sub>3</sub> (LS<sub><em>x</em></sub>CN) oxides and defect-induced La<sub>y</sub>Sr<sub>0.3</sub>Cr<sub>0.85</sub>Ni<sub>0.15</sub>O<sub>3</sub> (L<sub><em>y</em></sub>S<sub>0.3</sub>CN) oxides were developed to establish the structure-performance relationship of the component-optimized anodes. After optimal design of the single cell structure, it was found that the electrochemical activity can be significantly improved by adding the isolation layer Gd<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2</sub> (GDC) and tuning the defective nonequilibrium of L<sub><em>y</em></sub>S<sub>0.3</sub>CN. As a result, the electrolyte-supported NH<sub>3</sub>-SOFC using defect-induced L<sub>0.60</sub>S<sub>0.3</sub>CN anode with 50 sccm NH<sub>3</sub> as fuel gas gives the maximum power density of 501 mW/cm<sup>2</sup> at 800 ℃, 8.8 times higher than that of traditional NiO anode (57 mW/cm<sup>2</sup>). Based on relaxation time distribution analysis, the preferential rate-limiting step of the single cell may be proposed.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117622"},"PeriodicalIF":5.8,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489637","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}
Feihong Li , Lei Zheng , Zhanjun Liu , Mingyu Zhang , Qizhong Huang
{"title":"Insight into the evolution mechanism and properties of SiC modified (Ti, Zr, Hf)C multi-phase ceramics synthesized via the sol-gel method","authors":"Feihong Li , Lei Zheng , Zhanjun Liu , Mingyu Zhang , Qizhong Huang","doi":"10.1016/j.jeurceramsoc.2025.117619","DOIUrl":"10.1016/j.jeurceramsoc.2025.117619","url":null,"abstract":"<div><div>This work delves into the fascinating transformation from organic precursors to dense SiC-modified (Ti, Zr, Hf)C solid solution ceramics. Nanocrystalline powder was crafted through an innovative sol-gel process coupled with carbothermal reduction, followed by spark plasma sintering (SPS) to obtain the multi-phase ceramics. The results indicate that the addition of silicone alkoxide is required for forming a robust multi-phase gel network, which facilitates the formation of oxide intermediates (e.g., ZrSiO<sub>4</sub>, HfSiO<sub>4</sub>), accelerates phase transformation, and inhibits grain from coarsening by encapsulating Ti/Zr/Hf compounds while reinforcing grain boundaries. After pyrolysis at 1400 °C, the precursors gradually evolved into a highly crystalline, medium-entropy solid solution. The optimal sintered composite achieves a relative density of 97.8 % and an open porosity of 0.4 %. The mechanical properties were improved by induced lattice distortion and effect of fine-grained strengthening with the incorporation of SiC. Nanoindentation tests reveal that the hardness and elastic modulus of the (Ti, Zr, Hf)C-SiC composite reach 22.39 GPa and 342.78 GPa, respectively.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117619"},"PeriodicalIF":5.8,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272134","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}
Hadi Issa , Kevin Nadaud , Virgile Trannoy , Sarah Dine , Damien Brault , Yousra Mazloum , Vinh Ta Phuoc , Micka Bah , Fabien Giovannelli , Frédéric Schoenstein , Silvana Mercone , Isabelle Monot-Laffez
{"title":"Optimization of artificial multifunctional K0.5Na0.5NbO3–CoFe2O4 ceramics","authors":"Hadi Issa , Kevin Nadaud , Virgile Trannoy , Sarah Dine , Damien Brault , Yousra Mazloum , Vinh Ta Phuoc , Micka Bah , Fabien Giovannelli , Frédéric Schoenstein , Silvana Mercone , Isabelle Monot-Laffez","doi":"10.1016/j.jeurceramsoc.2025.117620","DOIUrl":"10.1016/j.jeurceramsoc.2025.117620","url":null,"abstract":"<div><div>Lead and rare earth-free (1-x)<span><math><mrow><mspace></mspace><msub><mrow><mi>K</mi></mrow><mrow><mn>0.5</mn></mrow></msub><msub><mrow><mi>Na</mi></mrow><mrow><mn>0.5</mn></mrow></msub><mi>Nb</mi><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> – (x)<span><math><mrow><mi>Co</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span> composites (where x = 0.05, 0.10 and 0.20), consisting of ferroelectric <span><math><mrow><msub><mrow><mi>K</mi></mrow><mrow><mn>0.5</mn></mrow></msub><msub><mrow><mi>Na</mi></mrow><mrow><mn>0.5</mn></mrow></msub><mi>Nb</mi><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> (KNN) matrix and ferromagnetic <span><math><mrow><mi>Co</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span> (CFO) nano-inclusions, were densified via spark plasma sintering (SPS) to develop multifunctional materials. X-ray diffraction (XRD) confirmed the absence of secondary phases. High resolution scanning electron microscopy (HR-SEM) revealed dense microstructures, with increasing CFO grain size at higher CFO content. Energy dispersive X-ray spectroscopy (EDS) mapping and scattered scanning near-field optical microscopy (s-SNOM) confirmed CFO distribution in KNN matrix. Ferroelectric hysteresis loops demonstrated ferroelectricity in all composites. Dielectric measurements showed relaxation behavior with increasing losses for higher CFO content. Magnetic analysis at room temperature indicated a dominant ferromagnetic behavior, with superparamagnetic and diamagnetic contributions from CFO and KNN, respectively. Our complete full knowledge studies functionalities will be helpful to build ceramics architectures suitable for magneto-electric properties.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117620"},"PeriodicalIF":5.8,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297866","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}
Xian Xue , Shiran Ma , Ziyu Wang , Yimeng Zhang , Jing Guo , Yuming Zhang
{"title":"High-performance LTCC: Structural and microwave dielectric properties of NaLn(MoO4)2 (Ln = Pr, Sm)","authors":"Xian Xue , Shiran Ma , Ziyu Wang , Yimeng Zhang , Jing Guo , Yuming Zhang","doi":"10.1016/j.jeurceramsoc.2025.117615","DOIUrl":"10.1016/j.jeurceramsoc.2025.117615","url":null,"abstract":"<div><div>In this work, the ultra-low loss scheelite-type Na<sub>0.5</sub>Pr<sub>0.5</sub>MoO<sub>4</sub> and Na<sub>0.5</sub>Sm<sub>0.5</sub>MoO<sub>4</sub> microwave dielectric ceramics were synthesized via the solid-state reaction method. The sintering behaviors, crystal structures, microstructures, chemical compatibility with silver electrodes, and microwave dielectric properties were systematically investigated. Both compositions exhibit good densification and chemical compatibility with silver electrodes. Na<sub>0.5</sub>Sm<sub>0.5</sub>MoO<sub>4</sub> ceramic achieves a high <em>Q</em> × <em>f</em> value of 90,900 GHz sintered at 890 °C with <span><math><msub><mrow><mi>ε</mi></mrow><mrow><mi>r</mi></mrow></msub></math></span> = 11.95, and <span><math><msub><mrow><mi>τ</mi></mrow><mrow><mi>f</mi></mrow></msub></math></span> = -45.61 ppm/°C, surpassing Na<sub>0.5</sub>Pr<sub>0.5</sub>MoO<sub>4</sub> ceramic, which exhibits <em>Q</em> × <em>f</em> = 72,600 GHz sintered at 830 °C. Raman and infrared spectroscopic analyses reveal that low-frequency phonons of [MoO<sub>4</sub>] tetrahedra dominate the dielectric response. Sm<sup>3+</sup> ions improve the packing fraction and structural symmetry of [MoO<sub>4</sub>] tetrahedra, effectively reducing lattice defects and dielectric losses, which contributes to the superior <em>Q</em> × <em>f</em> value of Na<sub>0.5</sub>Sm<sub>0.5</sub>MoO<sub>4</sub>. These findings highlight the potential of Na<sub>0.5</sub>Sm<sub>0.5</sub>MoO<sub>4</sub> ceramic as a high-performance candidate for LTCC applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117615"},"PeriodicalIF":5.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280579","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}
Lin Dong, Ming-Ze Ren, Ze-Yao Zeng, Guang-Rong Li, Mei-Jun Liu, Guan-Jun Yang
{"title":"Enhanced corrosion and oxidation resistance of environmental barrier coatings through densification and high crystallization at optimized deposition temperatures","authors":"Lin Dong, Ming-Ze Ren, Ze-Yao Zeng, Guang-Rong Li, Mei-Jun Liu, Guan-Jun Yang","doi":"10.1016/j.jeurceramsoc.2025.117613","DOIUrl":"10.1016/j.jeurceramsoc.2025.117613","url":null,"abstract":"<div><div>To withstand extreme aero gas turbine environments, environment barrier coatings (EBCs) must strongly resist high-temperature oxidation and water-vapor corrosion. A highly dense and crystalline structure is key to durability. This study explores ytterbium disilicate and monosilicate hybrid coatings fabricated using different plasma spraying techniques and deposition temperatures to assess their effects on density, crystallinity, and water-vapor corrosion resistance. Results revealed that low-heated (∼200 ℃) air plasma sprayed (APS) coatings had high porosity (7.3 %), multi-cracked structures, and mostly amorphous (above 90 %), making them highly susceptible to degradation. In contrast, low-pressure plasma spraying (LPPS) with low input power minimized silicon evaporation during deposition and increased crystallinity to 83 % by raising deposition temperature to 800 ℃. Highly dense and crystallized LPPS coatings remained structurally integrity after 300 h exposure in 90 vol%H<sub>2</sub>O-10vol%O<sub>2</sub> at 1350 ℃, effectively reducing silicate decomposition, cracking, and silicon oxidation, extending oxidation resistant life by more than 10 times.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117613"},"PeriodicalIF":5.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272148","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}
Heng Wang , Jiali Su , Hongyan Huang , Zixu Ji , Ning Liao , Shaobai Sang , Yawei Li , Tianbin Zhu
{"title":"Microstructure and comprehensive properties of BN-SiC composites fabricated via oscillatory pressure sintering","authors":"Heng Wang , Jiali Su , Hongyan Huang , Zixu Ji , Ning Liao , Shaobai Sang , Yawei Li , Tianbin Zhu","doi":"10.1016/j.jeurceramsoc.2025.117618","DOIUrl":"10.1016/j.jeurceramsoc.2025.117618","url":null,"abstract":"<div><div>BN-SiC composites with varying BN (40–70 wt%) and SiC (20–50 wt%) contents were fabricated <em>via</em> oscillatory pressure sintering at 1800 °C for 1 h. The results indicate that the B<sub>50</sub>S<sub>40</sub>Y<sub>10</sub> composites (BN/SiC=5:4) achieve a relative density of 94.65 %, flexural strength of 485.1 ± 24.2 MPa, fracture toughness of 4.87 ± 0.45 MPa·m<sup>1/2</sup>, and Vickers hardness of 4.78 ± 0.18 GPa. These enhancements are attributed to stress-induced strengthening at BN/SiC boundaries, as well as synergistic toughening mechanisms involving BN-mediated crack bridging and SiC-induced crack deflection. Additionally, SiC-rich composites exhibit enhanced wear resistance, with wear rate decreasing to (0.93–1.15) × 10<sup>−3</sup> mm<sup>3</sup>·N<sup>−1</sup> m<sup>−1</sup>, approximately two-thirds reduction compared to BN-rich composites. This reduction is attributed to a transition in the wear mechanism from abrasive-dominated to oxidation-dominated wear. Furthermore, BN-SiC composites display excellent oxidation resistance due to the formation of Y<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>/YBO<sub>3</sub> protective layers on their surface which effectively inhibits oxygen diffusion into the bulk material.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117618"},"PeriodicalIF":5.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272150","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}
Seong Wook Cho , Yong-Hyeon Na , Jeong Min Baik , Young Hun Jeong
{"title":"Texture-controlled electrostain response in PNN-PZT multilayer piezoelectric ceramic actuators enabled by asymmetric stacking strategy","authors":"Seong Wook Cho , Yong-Hyeon Na , Jeong Min Baik , Young Hun Jeong","doi":"10.1016/j.jeurceramsoc.2025.117614","DOIUrl":"10.1016/j.jeurceramsoc.2025.117614","url":null,"abstract":"<div><div>Multilayer piezoelectric textured ceramic actuators (T-MLCAs) of 0.5Pb(Ni<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-0.16PbZrO<sub>3</sub>-0.34PbTiO<sub>3</sub> (PNNZT) fabricated by two-dimensionally-dispersed template grain growth (2DD-TGG) are introduced. The texture morphology and electrostrain properties of the PNNZT T-MLCA by 2DD-TGG, co-fired at 1000°C for 48 h, were comparatively investigated by varying the stacking order of the sheets forming the MLCA. The PNNZT T-MLCA by 2DD-TGG with the asymmetrical stacking order in the vertical direction showed outstanding textured grain morphology, compared with the symmetrical counterpart. This is because heat supplied by the electrode during sintering contributes to the growth of the PNNZT textured grains. An extremely large <em>d</em><sub>33</sub>* value of 1182 pm/V at 0.5 kV/mm was achieved for the PNNZT T-MLCA by 2DD-TGG with the asymmetrical stacking order. In addition, its <em>d</em><sub>33</sub>* value was degraded as low as approximately 4.4 % up to 10<sup>6</sup> unipolar cycles, indicating that the actuator has excellent long lifetime.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117614"},"PeriodicalIF":5.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298015","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}
Junhao Zhao , Yanqin Fu , Junshuai Lv , Jiachen Li , Hui Chen , Yi Cao , Xue Li , Wei Li , Jinxue Ding , Yulei Zhang
{"title":"Insights into high entropy ceramics under extreme conditions: Ablation behavior and microstructure evolution of C/C-(Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C composites","authors":"Junhao Zhao , Yanqin Fu , Junshuai Lv , Jiachen Li , Hui Chen , Yi Cao , Xue Li , Wei Li , Jinxue Ding , Yulei Zhang","doi":"10.1016/j.jeurceramsoc.2025.117616","DOIUrl":"10.1016/j.jeurceramsoc.2025.117616","url":null,"abstract":"<div><div>High entropy ceramics (HECs) exhibit superior oxidation/ablation properties than traditional ceramics, particularly forming a low melting point phase with self-healing effect during the ablation process. Herein, C/C-(Ti<sub>0.2</sub>Zr<sub>0.2</sub>Hf<sub>0.2</sub>Nb<sub>0.2</sub>Ta<sub>0.2</sub>)C composites were fabricated by the combination of polymer infiltration pyrolysis (PIP) and chemical vapor infiltration (CVI). Oxyacetylene ablation behavior of C/C-(Ti<sub>0.2</sub>Zr<sub>0.2</sub>Hf<sub>0.2</sub>Nb<sub>0.2</sub>Ta<sub>0.2</sub>)C composites was studied systematically under a heat flux of 2.4 MW/m<sup>2</sup>, resulting in mass and linear recession rates of 0.58 mg/s and 5.13 µm/s, respectively. Due to the unique preferential behavior of multi-components, a dense transition layer containing (Hf, Zr)TiO<sub>4</sub> and (Nb, Ta, Ti)C was formed between the oxide layer and the matrix, which alleviated the thermal expansion coefficient mismatch between the oxide layer and the matrix, protecting the internal matrix at ultra-high temperatures. Our work investigated the ablation protection behavior and mechanism of C/C-(Ti<sub>0.2</sub>Zr<sub>0.2</sub>Hf<sub>0.2</sub>Nb<sub>0.2</sub>Ta<sub>0.2</sub>)C and broadened the application of HECs in the field of ultra-high temperature ablation resistance for carbon-based composites.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117616"},"PeriodicalIF":5.8,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272149","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}
Shichao Wang , Jialin Bai , Pengfei Zhang , Xuejian Liu , Xiumin Yao , Zhengren Huang
{"title":"High thermal conductive SiC ceramics prepared with ultralow sintering additives content derived from boric acid and sucrose","authors":"Shichao Wang , Jialin Bai , Pengfei Zhang , Xuejian Liu , Xiumin Yao , Zhengren Huang","doi":"10.1016/j.jeurceramsoc.2025.117612","DOIUrl":"10.1016/j.jeurceramsoc.2025.117612","url":null,"abstract":"<div><div>High thermal conductivity SiC ceramics with ultralow sintering additive content were developed using soluble boric acid and sucrose as B and C sources. The study systematically analyzed how B and C content affected the mechanical and thermal properties of SiC ceramics during pressureless sintering. Density was the main factor influencing these properties. SiC ceramics with B (0.1–0.4 wt%) and C (1–2 wt%) contents achieved relative densities above 97 %, with high thermal diffusivity (80–82 mm²/s) and thermal conductivity (166–171 W·m⁻¹·K⁻¹). Increasing B content reduced residual C, leading to larger grain sizes and slightly lower flexural strength. Conversely, higher C content decreased grain size and improved bending strength. The optimized ceramic with 0.1 wt% B and 1.5 wt% C exhibited exceptional thermal conductivity (171 W·m⁻¹·K⁻¹), which was attributed to the homogeneous dispersion of sintering additives from boric acid and sucrose, minimizing phonon scattering and excessive second-phase formation.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117612"},"PeriodicalIF":5.8,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254091","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}