Abstract Hexagonal boron nitride (h-BN) matrix textured ceramics were prepared by hot pressing sintering assisted with grain rearrangement during Digital Light Processing (DLP), using CaO-Y2O3-Al2O3 as a sintering additive. The effects of holding time on h-BN grain size, texture degree, mechanical and thermophysical properties were investigated. Under liquid phase sintering, the C-axis of the flaky h-BN grains was preferentially arranged in the direction parallel to the sintering pressure. With the increase of holding time, the texture degree of the material was gradually improved, and the mechanical and thermal physical properties of anisotropy were gradually enhanced. When the holding time was 4 h, the material had the most typical anisotropic characteristic and properties. Grain size and grain orientation degree were the main factors affecting the anisotropic properties.

中文翻译：

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保温时间对h-BN基织构陶瓷晶粒尺寸、取向度及性能的影响

摘要 以CaO-Y2O3-Al2O3为烧结添加剂，通过热压烧结辅助数字光处理(DLP)中的晶粒重排制备了六方氮化硼(h-BN)基织构陶瓷。研究了保温时间对h-BN晶粒尺寸、织构程度、力学和热物理性能的影响。在液相烧结下，片状 h-BN 晶粒的 C 轴优先排列在平行于烧结压力的方向上。随着保温时间的增加，材料的织构程度逐渐提高，各向异性的力学和热物理性能逐渐增强。当保温时间为 4 h 时，材料具有最典型的各向异性特性和性能。