Pub Date : 2026-01-06DOI: 10.1016/j.jeurceramsoc.2025.118119
Haohui Hao, Xiaomeng Fan, Xinlei Wang, Fang Ye, Jimei Xue
SiCf/Si3N4 composite is a promising structural wave-absorbing integrated composites, while the interphase damage caused by thermal expansion mismatch degrades its mechanical properties. By employing iBN-coated SiC fibers, a higher interfacial bonding strength between the fibers and the interphase can be achieved, thereby reducing the interphase damage in the composite. In this work, BN interphase with different thickness was deposited on the surface of iBN-coated SiC fibers. After the formation of multilayer BN interphase, the interfacial damage ratio decreased from 19 % to 3 %, and thus the tensile strength of the composites increased from 161 ± 10–196 ± 31 MPa. At the same time, with the change of intra-bundle fiber contact state, the minimum reflection coefficient of the composites decreased from −4.46 to −12.32 dB, resulting from the increase of the conduction loss.
{"title":"Optimization of interfacial zone microstructure of SiCf/Si3N4 composites containing in-situ formed BN coating","authors":"Haohui Hao, Xiaomeng Fan, Xinlei Wang, Fang Ye, Jimei Xue","doi":"10.1016/j.jeurceramsoc.2025.118119","DOIUrl":"10.1016/j.jeurceramsoc.2025.118119","url":null,"abstract":"<div><div>SiC<sub>f</sub>/Si<sub>3</sub>N<sub>4</sub> composite is a promising structural wave-absorbing integrated composites, while the interphase damage caused by thermal expansion mismatch degrades its mechanical properties. By employing iBN-coated SiC fibers, a higher interfacial bonding strength between the fibers and the interphase can be achieved, thereby reducing the interphase damage in the composite. In this work, BN interphase with different thickness was deposited on the surface of iBN-coated SiC fibers. After the formation of multilayer BN interphase, the interfacial damage ratio decreased from 19 % to 3 %, and thus the tensile strength of the composites increased from 161 ± 10–196 ± 31 MPa. At the same time, with the change of intra-bundle fiber contact state, the minimum reflection coefficient of the composites decreased from −4.46 to −12.32 dB, resulting from the increase of the conduction loss.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118119"},"PeriodicalIF":6.2,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940034","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}
CaCu3Ti4O12 ceramics were synthesized using high–energy ball milling (HEBM) and conventional ball milling (CBM) methods. The HEBM powder produced fine, high–quality powder with improved reactivity, facilitating the formation of dense and uniform ceramic microstructures with fine grains ranging from ∼1.1–1.7 μm. Optimally sintered HEBM ceramics exhibited high ε′ of ∼3000–4000 and exceptionally low tanδ∼0.026–0.009 at 1 kHz. The ε′ of HEBM ceramics remained stable across a broad frequency range (100 Hz to 1 MHz) and demonstrated excellent temperature stability from −55 to 150 °C, fulfilling the X8R capacitor standard, while CBM ceramics exhibited strong temperature–dependent ε′. Additionally, HEBM ceramics displayed significantly improved nonlinear current–voltage behavior, with a high nonlinear coefficient of 24.1 and a breakdown strength over ten times higher than that of CBM ceramics. Impedance and X–ray photoelectron analyses confirmed enhanced dielectric and nonlinear properties resulted mainly from improved grain boundaries.
{"title":"Significantly enhanced dielectric and nonlinear electrical properties in CCTO ceramics prepared via high–energy ball milling with fine–grained IBLC microstructure","authors":"Kwanruthai Sankham , Jurimart Wongsricha , Sirion Srilarueang , Jutapol Jumpatam , Nutthakritta Phromviyo , Pornjuk Srepusharawoot , Prasit Thongbai","doi":"10.1016/j.jeurceramsoc.2026.118126","DOIUrl":"10.1016/j.jeurceramsoc.2026.118126","url":null,"abstract":"<div><div>CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> ceramics were synthesized using high–energy ball milling (HEBM) and conventional ball milling (CBM) methods. The HEBM powder produced fine, high–quality powder with improved reactivity, facilitating the formation of dense and uniform ceramic microstructures with fine grains ranging from ∼1.1–1.7 μm. Optimally sintered HEBM ceramics exhibited high ε′ of ∼3000–4000 and exceptionally low tanδ∼0.026–0.009 at 1 kHz. The ε′ of HEBM ceramics remained stable across a broad frequency range (100 Hz to 1 MHz) and demonstrated excellent temperature stability from −55 to 150 °C, fulfilling the X8R capacitor standard, while CBM ceramics exhibited strong temperature–dependent ε′. Additionally, HEBM ceramics displayed significantly improved nonlinear current–voltage behavior, with a high nonlinear coefficient of 24.1 and a breakdown strength over ten times higher than that of CBM ceramics. Impedance and X–ray photoelectron analyses confirmed enhanced dielectric and nonlinear properties resulted mainly from improved grain boundaries.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118126"},"PeriodicalIF":6.2,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940030","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}
In light of the mounting imperative for high heat dissipation packages for power devices, the DLP 3D printing technique was utilized as a preparatory measure for integrated embedded microfluidic SiCN ceramic substrates. The fabrication of SiCN composite ceramics with minimal shrinkage (25.6 ± 0.2 %) and elevated fracture toughness (4.1 ± 0.1 MPa·m1/2) was accomplished by optimizing the Si3N4 whiskers filler content within the hybrid filler. The critical thermal shock temperature difference of α-Si3N4/Si3N4w/SiCN ceramics to reach 730 °C, which is 119 °C higher than α-Si3N4/SiCN ceramics without Si3N4 whiskers (621 °C). Ceramics substrates with embedded microfluidic channels (diameter less than 467 μm) were prepared by optimizing fillers, and the connectivity, airtightness, and heat dissipation properties were tested and simulated separately. The results demonstrated excellent impermeability and heat dissipation properties. The study provides a viable technical solution to the issue of heat dissipation of electronic components under high-temperature working conditions.
{"title":"Fabrication of α-Si3N4/Si3N4w/SiCN ceramic substrate with embedded microchannel by DLP","authors":"Zhongya Zhang , Yongzhao Hou , Juhai Weng , Cheng Zhong , Jing Xue , Jiawei Jiang , Guangwu Wen , Xuefei Ma , Lijuan Zhang","doi":"10.1016/j.jeurceramsoc.2025.118120","DOIUrl":"10.1016/j.jeurceramsoc.2025.118120","url":null,"abstract":"<div><div>In light of the mounting imperative for high heat dissipation packages for power devices, the DLP 3D printing technique was utilized as a preparatory measure for integrated embedded microfluidic SiCN ceramic substrates. The fabrication of SiCN composite ceramics with minimal shrinkage (25.6 ± 0.2 %) and elevated fracture toughness (4.1 ± 0.1 MPa·m<sup>1/2</sup>) was accomplished by optimizing the Si<sub>3</sub>N<sub>4</sub> whiskers filler content within the hybrid filler. The critical thermal shock temperature difference of α-Si<sub>3</sub>N<sub>4</sub>/Si<sub>3</sub>N<sub>4w</sub>/SiCN ceramics to reach 730 °C, which is 119 °C higher than α-Si<sub>3</sub>N<sub>4</sub>/SiCN ceramics without Si<sub>3</sub>N<sub>4</sub> whiskers (621 °C). Ceramics substrates with embedded microfluidic channels (diameter less than 467 μm) were prepared by optimizing fillers, and the connectivity, airtightness, and heat dissipation properties were tested and simulated separately. The results demonstrated excellent impermeability and heat dissipation properties. The study provides a viable technical solution to the issue of heat dissipation of electronic components under high-temperature working conditions.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118120"},"PeriodicalIF":6.2,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940029","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}
This study reports the first fabrication of strontium feldspar-silicon carbide (SAS-SiC) composites, investigating the densification mechanism and potential as integrated absorption-storage materials for solar thermal power generation. Results indicate the composite ceramic with 40 wt% SAS (40SAS/SiC) achieves densification (bulk density: 2.96 g/cm3) with high thermal conductivity (25.91 W·m−1·K−1). The high density is attained via liquid-phase sintering, owing to the good compatibility between SAS and SiC and the reduction of liquid phase viscosity by Na2CO3. Furthermore, the material demonstrates excellent heat storage capacity (1104 kJ·kg−1, 1000℃) and solar absorptance (88.1 %). After 100 h of oxidation at 1100 °C, it exhibits mass gain (5.71 mg·cm−2). The sample shows merely 5 % reduction in bending strength after 50 thermal shock cycles. This resilience benefits from its high thermal conductivity and the transformation of SAS from the hexagonal phase to the monoclinic phase during thermal shock, the latter possessing a lower thermal expansion coefficient.
{"title":"Densification mechanism and thermal physical properties of strontium feldspar - silicon carbide ceramics for integrated absorption-storage materials","authors":"Saixi Qiu , Jianfeng Wu , Xiaohong Xu , Yaqiang Shen , Deng Zhang , Mingzhuo Ding","doi":"10.1016/j.jeurceramsoc.2026.118125","DOIUrl":"10.1016/j.jeurceramsoc.2026.118125","url":null,"abstract":"<div><div>This study reports the first fabrication of strontium feldspar-silicon carbide (SAS-SiC) composites, investigating the densification mechanism and potential as integrated absorption-storage materials for solar thermal power generation. Results indicate the composite ceramic with 40 wt% SAS (40SAS/SiC) achieves densification (bulk density: 2.96 g/cm<sup>3</sup>) with high thermal conductivity (25.91 W·m<sup>−1</sup>·K<sup>−1</sup>). The high density is attained via liquid-phase sintering, owing to the good compatibility between SAS and SiC and the reduction of liquid phase viscosity by Na<sub>2</sub>CO<sub>3</sub>. Furthermore, the material demonstrates excellent heat storage capacity (1104 kJ·kg<sup>−1</sup>, 1000℃) and solar absorptance (88.1 %). After 100 h of oxidation at 1100 °C, it exhibits mass gain (5.71 mg·cm<sup>−2</sup>). The sample shows merely 5 % reduction in bending strength after 50 thermal shock cycles. This resilience benefits from its high thermal conductivity and the transformation of SAS from the hexagonal phase to the monoclinic phase during thermal shock, the latter possessing a lower thermal expansion coefficient.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118125"},"PeriodicalIF":6.2,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940035","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}
Lithium loss resulting from undesirable side reactions of reactive lithium-compounds with substrate materials during the synthesis of Ni-rich ternary lithium transition-metal oxides are investigated. NMC811 samples were synthesized in different reaction crucibles, starting from oxide precursors (Ni0.8Mn0.1Co0.1O) and LiOH. Post-mortem analysis of the crucibles by means of SEM-EDS and XRD, combined with structural and electrochemical characterization of the obtained cathode materials reveal a clear correlation between the final lithium to metal ratio in the cathode material and the chosen substrate material and exemplify the effect on the materials’ performance. It was determined that the commonly used ceramic oxides SiO2 and Al2O3 compete with the transition metal oxide precursor for lithiation at high temperature, resulting in high lithium losses, increased Ni2+/Li+ mixing and suboptimal electrochemical performance. In contrast, it is demonstrated that the occurrence of parasitic side reactions is greatly reduced in MgO and Au, resulting in materials with improved performance.
{"title":"On the sensitivity of ternary lithium-ion cathode materials to substrate-induced lithium loss during calcination","authors":"Siebe Coessens , Behnam Bahramian , Inge Bellemans , Tijl Crivits , Christophe Detavernier , Kim Verbeken","doi":"10.1016/j.jeurceramsoc.2025.118124","DOIUrl":"10.1016/j.jeurceramsoc.2025.118124","url":null,"abstract":"<div><div>Lithium loss resulting from undesirable side reactions of reactive lithium-compounds with substrate materials during the synthesis of Ni-rich ternary lithium transition-metal oxides are investigated. NMC811 samples were synthesized in different reaction crucibles, starting from oxide precursors (Ni<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O) and LiOH. Post-mortem analysis of the crucibles by means of SEM-EDS and XRD, combined with structural and electrochemical characterization of the obtained cathode materials reveal a clear correlation between the final lithium to metal ratio in the cathode material and the chosen substrate material and exemplify the effect on the materials’ performance. It was determined that the commonly used ceramic oxides SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> compete with the transition metal oxide precursor for lithiation at high temperature, resulting in high lithium losses, increased Ni<sup>2+</sup>/Li<sup>+</sup> mixing and suboptimal electrochemical performance. In contrast, it is demonstrated that the occurrence of parasitic side reactions is greatly reduced in MgO and Au, resulting in materials with improved performance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118124"},"PeriodicalIF":6.2,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940025","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}
Pub Date : 2026-01-02DOI: 10.1016/j.jeurceramsoc.2025.118122
Shengye Zhai , Na Ni , Weiwei Xiao , Hongxia Liang , Xiaohui Fan
In this work, flash sintering under an AC electric field was employed to co-sinter a multilayer structure consisting of a 20 mol% gadolinium doped ceria (GDC20) electrolyte with a (La0.6Sr0.4)0.99CoO3-δ (LSC64) cathode for solid oxide cell applications. A series current configuration where the electrical field is perpendicular to the layer interface was adopted and found to beneficial in co-sintering GDC20 and LSC64 layers with large conductivity differences. Optimized FS conditions allow to achieve full densification of the electrolyte while maintaining high porosity in the electrode without interfacial cracks and elemental interdiffusion. Preferential densification and grain growth of GDC were found to occur near its interface with the LSC layer, which may be related to the accelerated oxygen electrochemical reduction reaction at the interfacial area where the porous LSC64 layer, as a mixed ion-electron conductor, provides abundant three-phase reaction sites.
{"title":"Flash co-sintering of a solid oxide fuel cell electrolyte - electrode multilayers structure under an AC electric field","authors":"Shengye Zhai , Na Ni , Weiwei Xiao , Hongxia Liang , Xiaohui Fan","doi":"10.1016/j.jeurceramsoc.2025.118122","DOIUrl":"10.1016/j.jeurceramsoc.2025.118122","url":null,"abstract":"<div><div>In this work, flash sintering under an AC electric field was employed to co-sinter a multilayer structure consisting of a 20 mol% gadolinium doped ceria (GDC20) electrolyte with a (La<sub>0.6</sub>Sr<sub>0.4</sub>)<sub>0.99</sub>CoO<sub>3-δ</sub> (LSC64) cathode for solid oxide cell applications. A series current configuration where the electrical field is perpendicular to the layer interface was adopted and found to beneficial in co-sintering GDC20 and LSC64 layers with large conductivity differences. Optimized FS conditions allow to achieve full densification of the electrolyte while maintaining high porosity in the electrode without interfacial cracks and elemental interdiffusion. Preferential densification and grain growth of GDC were found to occur near its interface with the LSC layer, which may be related to the accelerated oxygen electrochemical reduction reaction at the interfacial area where the porous LSC64 layer, as a mixed ion-electron conductor, provides abundant three-phase reaction sites.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 7","pages":"Article 118122"},"PeriodicalIF":6.2,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940026","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118155"},"PeriodicalIF":6.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146661539","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118248"},"PeriodicalIF":6.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146661551","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118201"},"PeriodicalIF":6.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146661556","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118183"},"PeriodicalIF":6.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146661562","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}