IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jeurceramsoc.2025.118107

Huimin Xiang , Jie Fan , Siyuan Huang , Yiran Li , Yuchen Liu , Wenxian Li , Yanchun Zhou , Bin Liu

Porous ceramics with ultralow thermal conductivity and robust thermal stability are critical for advanced hypersonic vehicles. However, sintering and phase transitions of these materials have been critical problems. To address these issues, herein, we report the synthesis of multicomponent (Zn_0.1Ca_0.1Sr_0.4Ba_0.4)ZrO₃ powders via solid-phase reaction and subsequent fabrication of sintering-resistant porous ceramics using a particle-stabilized foaming approach. By modulating solid loading (20–40 wt%), we achieved tailorable architectures with porosity levels of 81.6–92.3 % and compressive strengths of 0.97–4.50 MPa. The optimized material demonstrates ultralow room-temperature thermal conductivity (0.086–0.150 W/(m·K)), remarkably preserved at 0.232 W/(m·K) at 1000°C. Crucially, these ceramics exhibit exceptional thermomechanical stability with < 1 % linear shrinkage after 6 h heating at 1700°C and survive 200°C-quenching thermal shocks without catastrophic structural failure. These combined properties position (Zn_0.1Ca_0.1Sr_0.4Ba_0.4)ZrO₃ porous ceramics as a promising candidate for ultrahigh-temperature insulation in aerospace and energy systems.

多孔陶瓷具有超低导热率和强大的热稳定性，是先进高超声速飞行器的关键。然而，这些材料的烧结和相变一直是关键问题。为了解决这些问题，本文报道了通过固相反应合成多组分（Zn0.1Ca0.1Sr0.4Ba0.4）ZrO3粉末和随后使用颗粒稳定发泡方法制备耐烧结多孔陶瓷的方法。通过调节固体载荷（20-40 wt%），我们实现了孔隙率为81.6-92.3 %、抗压强度为0.97-4.50 MPa的可定制结构。优化后的材料具有极低的室温导热系数（0.086-0.150 W/(m·K)），在1000℃时显著保持在0.232 W/（m·K）。至关重要的是，这些陶瓷在1700°C加热6 h后表现出优异的热机械稳定性<； 1 %的线收缩率，并且在200°C淬火的热冲击下不会发生灾难性的结构破坏。这些综合性能使（Zn0.1Ca0.1Sr0.4Ba0.4）ZrO3多孔陶瓷成为航空航天和能源系统中极有前途的超高温绝缘材料。

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引用次数: 0

Mechanism of amorphous SiO₂ grain boundary modulation to inhibit abnormal grain growth and high-temperature strengthening of 3YSZ ceramic fibers 非晶sio2晶界调制抑制3YSZ陶瓷纤维异常晶粒生长和高温强化的机理

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jeurceramsoc.2026.118128

Youmei Wang , Ying Peng , Weiwei Qin, Luyi Zhu, Yongshuai Xie, Benxue Liu, Xinqiang Wang, Guanghui Zhang, Dong Xu

Amorphous SiO₂ doping is effective in refining grains and enhancing the mechanical properties of brittle ceramics. This study investigates 3YSZ continuous fibers doped with SiO₂ additives. In situ high-temperature spherical aberration-corrected transmission electron microscopy reveals that liquid-like amorphous SiO₂ at grain boundaries facilitates directional adsorption of small grains through capillary action, improving grain size uniformity. This reduces the curvature difference at grain boundaries, thus ultimately decreasing the grain annexation. Kinetic analysis reveals that intergranular amorphous SiO₂ suppresses grain boundary diffusion in zirconia, rendering lattice diffusion dominant at elevated temperatures and suppressing grain coarsening. Small grain accumulation and grain-boundary amorphous SiO₂ significantly reduce pore size, effectively relieving grain-boundary stress concentration. With 10 mol% SiO₂ doping, fibers sintered at 1500 °C exhibit optimal performance, achieving 50 % smaller grains and 28 % higher tensile strength than undoped fibers.

在脆性陶瓷中掺入非晶态SiO2可有效细化晶粒，提高脆性陶瓷的力学性能。本文研究了掺杂SiO2添加剂的3YSZ连续纤维。原位高温球差校正透射电镜显示，晶界处的液态无定形SiO2通过毛细作用有利于小颗粒的定向吸附，提高了晶粒尺寸的均匀性。这减少了晶界处的曲率差，从而最终减少了晶粒的兼并。动力学分析表明，晶间非晶SiO2抑制氧化锆的晶界扩散，使晶格扩散在高温下占优势，抑制晶粒粗化。小颗粒堆积和晶界无定形SiO2显著减小孔径，有效缓解晶界应力集中。当SiO2掺杂量为10 mol%时，在1500°C烧结的纤维表现出最佳性能，与未掺杂的纤维相比，晶粒尺寸减小了50% %，拉伸强度提高了28% %。

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引用次数: 0

The effect of metal doping on the piezoelectric response of AlN film ultrasonic transducers 金属掺杂对AlN膜超声换能器压电响应的影响

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-24 DOI: 10.1016/j.jeurceramsoc.2026.118169

Xiaomei Zeng , Heng Jiang , Rakhimbergan Rakhimov , Shavkat Yuldashev , Changwei Zou , Jun Zhang , Oleksandr Pohrebniak , Bing Yang , Sheng Liu , Vasiliy O. Pelenovich

Piezoelectric AlN thick films doped with Cr, Cu, Nb, Sc, Ta, Ti, Y, Zn, and Zr were deposited on Si and stainless-steel substrates using reactive RF magnetron sputtering. Planar Al sputter target with asymmetrically embedded disk of doping metal was employed in this study. The concentration of doping metal in the deposited films was a function of the distance between the substrate and the inlaid disk. Analysis of the film structure showed that, with the exception of ScAlN and ZnAlN films, the columnar structure and piezoelectric response of doped films were gradually degraded with increasing metal concentration. The piezoelectric d₃₃^eff constants of ScAlN (6.7 at% of Sc), ZnAlN (1.6 at% of Zn), NbAlN (1.2 at% of Nb), TiAlN (0.7 at% of Ti), and AlN films are 10.1 ± 0.5 pC/N, 5.3 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, and 5.6 ± 0.5 pC/N, respectively. Pulse-echo response of these films was studied using ultrasonic transducers and correlation between their piezoelectric d₃₃^eff constant and amplitude of the response was found.

采用反应性射频磁控溅射技术在Si和不锈钢衬底上制备了掺杂Cr、Cu、Nb、Sc、Ta、Ti、Y、Zn和Zr的压电AlN厚膜。采用不对称嵌入掺杂金属盘的平面铝溅射靶。沉积膜中掺杂金属的浓度是衬底与镶嵌盘之间距离的函数。对薄膜结构的分析表明，除了ScAlN和ZnAlN薄膜外，掺杂薄膜的柱状结构和压电响应随着金属浓度的增加而逐渐退化。的压电d33eff常量ScAlN (Sc) 6.7 %,ZnAlN锌(1.6 %),NbAlN Nb(1.2 %),TiAlN (Ti) 0.7 %,和AlN电影10.1 ±0.5 pC / N, 5.3±0.5 pC / N, 5.2±0.5 pC / N, 5.2±0.5 pC / N,和5.6 ±0.5 pC / N,分别。利用超声换能器研究了这些薄膜的脉冲回波响应，发现了它们的压电d33eff常数与响应幅度之间的相关性。

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引用次数: 0

Introduction of Ca2+ and Ti4+ ions by a novel additive CaTiO3 for manufacturing low power loss MnZn ferrites 用新型添加剂CaTiO3引入Ca2+和Ti4+离子制备低功耗MnZn铁氧体

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jeurceramsoc.2026.118166

Mengrui Li , Xianmeng Chen , Boon Xian Chai , Guibing Shi , M. Akbar Rhamdhani , Li Wang , Shanqing Xu

This study proposes a novel CaTiO₃ (CTO) doping strategy for MnZn ferrites to co-incorporate Ca²⁺ and Ti⁴⁺ ions, aiming to develop low power loss magnetic materials for megahertz-range frequency applications. The effects of CaTiO₃ doping on power loss, cut-off frequency, and microstructure were systematically examined. As compared with traditional CaO and TiO₂ doping, CaTiO₃ doping enabled more uniform dopant distribution, refined grain structure, and enhanced electrical resistivity. Among all samples, the MnZn ferrites doped with CTO achieved an 87.5 % reduction in power loss (155 mW/cm³ at 1 MHz/30 mT/25 °C) relative to the undoped reference, while maintaining excellent magnetic performance. Loss separation analysis revealed that the major contribution to this improvement was the suppression of eddy current loss (P_e), complemented by reductions in hysteresis (P_h). This work demonstrates the great potential of CaTiO₃ as a cost-effective, scalable, and efficient dopant for enhancing the high-frequency performance of MnZn ferrites in next-generation power electronics.

本研究提出了一种新的CaTiO3 （CTO）掺杂MnZn铁氧体的策略，以结合Ca2+和Ti4+离子，旨在开发用于兆赫频率范围应用的低功耗磁性材料。系统考察了CaTiO3掺杂对功率损耗、截止频率和微结构的影响。与传统的CaO和TiO2掺杂相比，CaTiO3掺杂使掺杂物分布更加均匀，晶粒结构更加精细，电阻率也得到了提高。在所有样品中，与未掺杂的参考样品相比，掺杂CTO的MnZn铁氧体的功率损耗降低了87.5 %（在1 MHz/30 mT/25°C时为155 mW/cm3），同时保持了优异的磁性能。损耗分离分析显示，这种改进的主要贡献是抑制了涡流损耗（Pe），并辅以降低了磁滞（Ph）。这项工作证明了CaTiO3作为一种具有成本效益，可扩展和高效的掺杂剂的巨大潜力，可以增强下一代电力电子中MnZn铁氧体的高频性能。

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引用次数: 0

UV-assisted drop casting as a novel technique in fabrication of dense ceramic microbeads 紫外辅助滴铸是制备致密陶瓷微珠的一种新技术

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-21 DOI: 10.1016/j.jeurceramsoc.2026.118161

Radoslaw Zurowski , Blanka Seredynska , Karolina Korycka , Aleksandra Szewczyk , Zofia Skowronska , Zofia Kostrzewska , Wiktor Drab , Joanna Tanska , Dominik Wolosz , Anna Wieclaw-Midor , Piotr Wiecinski , Justyna Zygmuntowicz , Dawid Kozien , Paulina Wiecinska , Gustavo Suárez , Pawel Falkowski

This research presents a novel UV-assisted drop casting approach for shaping ceramic microbeads from aqueous-based UV-curable alumina suspensions. The work focused on optimising suspension composition and shaping conditions to obtain dense microbeads with high sphericity. The effects of dispersant concentration, solid loading, monomer ratio, and photoinitiator content on rheology and UV curing were systematically investigated. The optimal suspension (42.5 vol% alumina; water:2-hydroxyethyl acrylate:poly(propylene glycol) dimethacrylate ratio 10:9:1; 5 wt% dispersant; 0.5 wt% photoinitiator) showed shear-thinning behaviour and a cure depth of 580 µm. Shaped droplets were UV-cured in a hydrophobic medium, and thermal analysis enabled controlled debinding and sintering. The best series yielded beads with an average diameter of 1262 µm, circularity up to 0.99, and low dimensional variability. Dense microstructures with minimal porosity were achieved, though surface delamination and grain coarsening occurred. The method enables efficient fabrication of spherical ceramic elements with high structural integrity.

本研究提出了一种新的紫外辅助滴铸方法，用于从水基紫外固化氧化铝悬浮液中塑造陶瓷微珠。工作重点是优化悬浮液成分和成型条件，以获得高球形度的致密微珠。系统研究了分散剂浓度、固载量、单体配比、光引发剂含量对树脂流变性和紫外光固化的影响。最佳悬浮液(42.5 体积%氧化铝；水：2-羟乙基丙烯酸酯：聚（丙二醇）二甲基丙烯酸酯比例10:9:1；5 wt %分散剂;0.5 wt%光引发剂)表现出剪切减薄行为，固化深度为580 µm。成型的液滴在疏水介质中进行紫外线固化，热分析实现了受控的脱脂和烧结。最佳系列的珠粒平均直径为1262 µm，圆度可达0.99，尺寸可变性低。虽然出现了表面分层和晶粒粗化，但获得了致密的微观结构和最小的孔隙率。该方法能够高效地制造具有高结构完整性的球形陶瓷元件。

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引用次数: 0

Tailoring the Hf/(Ti+Ta) ratio to achieve synergistic oxide-induced ablation resistance in C/C-(Hf, Ti, Ta)C-SiC composites 调整Hf/(Ti+Ta)比例，在C/C-(Hf, Ti, Ta)C- sic复合材料中实现协同抗氧化烧蚀

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-12 DOI: 10.1016/j.jeurceramsoc.2026.118145

Qianqian Fan , Yanqin Fu , Fan Zhou , Junhao Zhao , Xue Li , Yuxin Li , Qingzhe Cui , Pei Wang , Yulei Zhang

Despite the improved ablation resistance offered by Hf-based ultra-high temperature ceramics (UHTCs) in carbon/carbon (C/C) composites, the porous oxide scales formed during ablation limits their long-term thermal stability, hindering advanced application. Herein, this work proposed the incorporation of Hf/Ti+Ta with varying molar ratios into C/C composites via reactive melt infiltration, and the resulting multi-component oxides after ablation promoted the formation of a dense oxide layer, thereby improving long-term ablation performance. The finding reveals that all samples were relatively dense and exhibited an identical layered structure around carbon fibers. Notably, the composites with a Hf/Ti/Ta molar ratio of 8:2:1 (8-HTT) exhibited superior ablation resistance, owing to the formation of a dense, adherent surface oxide layer, consisting of (Hf, Ti, Ta)O₂ and HfTiO₄. As the ablation duration increased to 240 s, the linear ablation rate for 8-HTT decreased to 0.7 μm/s, which was attributed to the self-healing effect enabled by low-melting-point oxide Hf₆Ta₂O₁₇. This work establishes a theoretical foundation and optimization strategy for designing high-performance ablation-resistant C/C composites for extreme thermal environments.

尽管高频基超高温陶瓷（UHTCs）在碳/碳（C/C）复合材料中提供了更好的抗烧蚀性能，但烧蚀过程中形成的多孔氧化层限制了其长期热稳定性，阻碍了其进一步应用。本文提出通过反应熔融渗透将不同摩尔比的Hf/Ti+Ta掺入C/C复合材料中，烧蚀后形成的多组分氧化物促进了致密氧化物层的形成，从而提高了长期烧蚀性能。这一发现表明，所有的样品都相对致密，并且在碳纤维周围呈现出相同的层状结构。值得注意的是，Hf/Ti/Ta摩尔比为8:2:1 （8-HTT）的复合材料具有优异的抗烧蚀性能，这是由于表面形成了致密的氧化层，由（Hf, Ti, Ta）O2和HfTiO4组成。当烧蚀时间增加到240 s时，8-HTT的线性烧蚀速率降低到0.7 μm/s，这是由于低熔点氧化物Hf6Ta2O17的自愈作用。本研究为设计高性能抗烧蚀C/C复合材料在极端热环境中的应用奠定了理论基础和优化策略。

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引用次数: 0

Origin of grain refinement and influence on physical properties in Yb-doped BaZrO3 ceramics 掺镱BaZrO3陶瓷晶粒细化的原因及其对物理性能的影响

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jeurceramsoc.2026.118164

Jiaqi He , Shaoyi Li , Minghao Xue , Peng Ji , Jingkun Yu , Lei Yuan

To overcome the inherent limitations in the physical properties of pure BaZrO₃ ceramics, a solid-state reaction was employed to fabricate Yb-doped BaZrO₃ ceramics with Yb doping levels of 1, 3, 5, and 7 wt%. The phase composition, defect structure, grain refinement mechanisms, and the impact of Yb doping concentration on the physical properties of the obtained ceramics was systematically studied. XRD analysis confirms that Yb dissolved into the Zr site of BaZrO₃. The secondary phase Yb₂Zr₂O₇ precipitates at grain boundaries when the Yb dopant concentration exceeds 3 wt%. The average grain size decreases significantly from 6 μm to 0.44 μm with the increasing of Yb dopping amount. This grain refinement arises from the decreased mobility of grain boundaries during sintering, resulting from both the point defect (such as

V_{O}^{••}

) due to Yb doping and the pinning effect exerted by the secondary Yb₂Zr₂O₇ phase. The compressive strength peaks at 198 MPa for 3 wt% Yb doping, while thermal conductivity progressively decreases to 3.061 W·m⁻¹·K⁻¹ with Yb increasing dopant concentration. The improvement in physical properties stems from the synergistic effect of grain size, porosity, and point defects.

为了克服纯BaZrO3陶瓷物理性能的固有局限性，采用固相反应制备了Yb掺杂水平分别为1,3,5和7 wt%的掺镱BaZrO3陶瓷。系统地研究了相组成、缺陷结构、晶粒细化机理以及Yb掺杂浓度对陶瓷物理性能的影响。XRD分析证实，Yb溶解在BaZrO3的Zr位点。当Yb掺杂浓度超过3 wt%时，二次相Yb2Zr2O7在晶界处析出。随着Yb掺量的增加，合金的平均晶粒尺寸从6 μm减小到0.44 μm。这种晶粒细化源于烧结过程中晶界迁移率的降低，这是由Yb掺杂造成的点缺陷（如VO••）和次生Yb2Zr2O7相的钉住作用造成的。当Yb掺杂量为3 wt%时，材料的抗压强度在198 MPa处达到峰值，而随着Yb掺杂量的增加，材料的导热系数逐渐降低至3.061 W·m−1·K−1。物理性能的改善源于晶粒尺寸、孔隙度和点缺陷的协同作用。

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引用次数: 0

Dual strategy to enhance the nitridation resistance of MoSi2-based ceramics for high-temperature applications 提高高温mosi2基陶瓷耐氮化性能的双重策略

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-18 DOI: 10.1016/j.jeurceramsoc.2026.118155

Lu Zhu , Nana Zhu , Pengju Tang , Baojing Zhang , Shengyuan Lei , Xiaohong Wang , Peizhong Feng

MoSi₂‑based ceramics with superior high‑temperature nitridation resistance were developed through a dual strategy combining Al alloying and pre‑oxidation. A two-step route, self-propagating high-temperature synthesis followed by spark plasma sintering, was employed to prepare MoSi₂ and Al-alloyed Mo(Si_0.95Al_0.05)₂. Al incorporation and pre‑oxidation at 1500 °C produced dense Al–Si–O composite scales that merged the impermeability of SiO₂ with the thermal stability of Al₂O₃. During direct nitridation at 1200 °C, the nitrogen diffusion coefficients of Mo(Si_0.95Al_0.05)₂ decreased by 76% and 82% in the rapid (0–16 h) and slow (16–64 h) stages, and its overall mass change was much lower than that of MoSi₂. Pre‑oxidation further enhanced protection, reducing diffusion coefficients to 0.005 and 0.001 mg/cm²·h^0.5 compared with MoSi₂ (0.007 and 0.004 mg/cm²·h^0.5), due to the formation of stable Al–Si–O scales. Therefore, the pioneering dual strategy demonstrates a novel approach for developing advanced MoSi₂-based ceramics with outstanding high-temperature nitridation resistance.

采用Al合金化和预氧化相结合的双重策略制备了具有优异耐高温氮化性能的MoSi2基陶瓷。采用自蔓延高温合成-火花等离子烧结两步法制备了MoSi2和Mo(Si0.95Al0.05)2铝合金。在1500℃下，Al掺入和预氧化产生了致密的Al - si - o复合鳞片，将SiO2的不渗透性与Al2O3的热稳定性结合在一起。在1200℃直接硝化过程中，Mo(Si0.95Al0.05)2的氮扩散系数在快速（0 ~ 16 h）和慢速（16 ~ 64 h）阶段分别下降了76%和82%，其总体质量变化量远低于MoSi2。预氧化进一步增强了保护作用，与MoSi2（0.007和0.004 mg/cm2·h0.5）相比，扩散系数降低到0.005和0.001 mg/cm2·h0.5，这是由于形成了稳定的Al-Si-O鳞片。因此，开创性的双重策略为开发具有优异耐高温氮化性能的先进mosi2基陶瓷提供了一种新方法。

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引用次数: 0

Giant strain vanishes in multilayer ceramics: The limitation of defect-dipole engineering 大应变在多层陶瓷中消失：缺陷偶极子工程的局限性

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2026-01-15 DOI: 10.1016/j.jeurceramsoc.2026.118147

Chengming Li , Lang Bian , Jianhui Jia , Shangpeng Yang , Kai Li , Pengrong Ren

The introduction of oxygen vacancies and defect dipoles to induce giant bending strain is a cutting-edge strategy to improve the performance of piezoelectric ceramics. However, its feasibility in a more widely used multi-layer structure is still unknown. In this study, it is found that the giant strain successfully achieved in single-layer ceramics almost disappeared in multi-layer ceramics based on the same material system. The system analysis shows that the internal mechanical clamping effect introduced by the multi-layer structure and the opposite bending direction between adjacent layers are the root causes of large strain failure. The conclusion of this study clearly points out that the excellent piezoelectric properties in unconstrained single-layer samples cannot be directly converted into the actual advantages of multi-layer devices. This finding provides a crucial application perspective correction for the current popular defect engineering research.

引入氧空位和缺陷偶极子诱导巨大弯曲应变是提高压电陶瓷性能的前沿策略。然而，它在更广泛应用的多层结构中的可行性仍然是未知的。本研究发现，基于相同材料体系的多层陶瓷中，单层陶瓷中成功实现的巨应变几乎消失。系统分析表明，多层结构引入的内部机械夹紧效应和相邻层间相反的弯曲方向是造成大应变破坏的根本原因。本研究的结论清楚地指出，无约束单层样品优异的压电性能并不能直接转化为多层器件的实际优势。这一发现为当前流行的缺陷工程研究提供了重要的应用视角修正。

引用次数: 0

Performance improvement of Si3N4/BN slurry and porous ceramics caused by the synergistic effect of BN surface functionalization and high light transmission of SiO2 氮化硼表面功能化与SiO2高透光性协同作用对氮化硼/氮化硼浆料和多孔陶瓷性能的改善

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2026-07-01 Epub Date: 2025-12-30 DOI: 10.1016/j.jeurceramsoc.2025.118118

Yifei Yan , Chuanzhen Huang , Zhenyu Shi , Zhen Wang , Longhua Xu , Shuiquan Huang , Meina Qu , Zhengkai Xu , Dijia Zhang , Baosu Guo , Tianye Jin , Xiaodan Wang , Hanlian Liu , Dun Liu , Peng Yao

The fabrication of porous Si₃N₄/BN ceramics for high-temperature radomes via vat photopolymerization is hindered by excessive slurry viscosity, which restricts the recoating process, and by limited curing depth. To overcome these challenges, we developed a high-performance slurry using a synergistic strategy combining BN surface functionalization with optical modulation via SiO₂. Ultrasonic-assisted hydrolysis and silane coupling significantly enhanced interfacial compatibility with the resin, reducing viscosity from 20.83 to 4.51 Pa·s at a shear rate of 30 s⁻¹. Simultaneously, the incorporation of refractive-index-matched SiO₂ effectively suppressed light scattering, thereby increasing curing depth and structural integrity. Furthermore, SiO₂ regulated liquid-phase behavior during sintering to optimize the microstructure. The resulting ceramics exhibited an exceptional property balance: 42.14 % porosity, 68.2 MPa flexural strength, a dielectric constant of 2.56, and a loss tangent of 6.85 × 10⁻³. These metrics satisfy the stringent requirements for wave-transparent applications, offering a robust pathway for manufacturing complex-shaped components.

通过还原光聚合法制备用于高温天线罩的多孔Si3N4/BN陶瓷，浆料粘度过高，限制了重涂工艺，并且固化深度有限。为了克服这些挑战，我们开发了一种高性能浆料，采用协同策略，将BN表面功能化与通过SiO2进行光学调制相结合。超声辅助水解和硅烷偶联显著增强了与树脂的界面相容性，以30 s−1的剪切速率将粘度从20.83降低到4.51 Pa·s。同时，掺入折射率匹配的SiO2有效地抑制了光散射，从而增加了固化深度和结构完整性。此外，SiO2调节烧结过程中的液相行为以优化微观结构。所得陶瓷具有优异的性能平衡：孔隙率为42.14 %，抗折强度为68.2 MPa，介电常数为2.56，损耗正切为6.85 × 10−3。这些指标满足了波透明应用的严格要求，为制造复杂形状的部件提供了强大的途径。

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引用次数: 0

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