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Preparation method of boron nitride and aluminum nitride composite ceramic
The invention provides a preparation method of boron nitride and aluminum nitride composite ceramic, and relates to the technical field of preparation of ceramic composite materials. The method comprises the following steps: dissolving aluminum isopropoxide in isopropanol, adding an aluminum salt and a citric acid aqueous solution, and adjusting the pH value to a proper range to prepare sol; then adding modified boron nitride into the sol, and ensuring uniform distribution of the modified boron nitride through ultrasonic dispersion treatment; then performing spray drying to obtain precursor powder; performing cold isostatic pressing on the precursor powder to obtain a cold-pressed blank; after presintering in an inert atmosphere, transferring into ammonia gas to carry out high-temperature nitridation reaction; and finally, carrying out pressureless sintering in an inert atmosphere to finally obtain the high-performance boron nitride and aluminum nitride composite ceramic. According to the method, the technological process is optimized, no extra sintering aid or complex treatment is needed, the uniformity and compactness of the material are remarkably improved, and the method has the advantages of being low in production cost and high in preparation efficiency.
本发明提供了一种氮化硼氮化铝复合陶瓷的制备方法，涉及陶瓷复合材料制备技术领域。所述方法包括将异丙醇铝溶解于异丙醇中，加入铝盐和柠檬酸水溶液，调整pH值至适宜范围制得溶胶；然后将改性氮化硼加入溶胶中，通过超声波分散处理确保其均匀分布；随后喷雾干燥得到前驱体粉末；接着将前驱体粉末冷等静压成型得到冷压坯；在惰性气氛中预烧结后，转移至氨气中进行高温氮化反应；最后在惰性气氛中进行无压烧结，最终得到高性能的氮化硼氮化铝复合陶瓷。本发明通过优化工艺流程，无需引入额外烧结助剂或复杂处理，实现了材料均匀性和致密度的显著提升，具有生产成本低、制备效率高的特点。
Preparation method of boron nitride and aluminum nitride composite ceramic
The invention provides a preparation method of boron nitride and aluminum nitride composite ceramic, and relates to the technical field of preparation of ceramic composite materials. The method comprises the following steps: dissolving aluminum isopropoxide in isopropanol, adding an aluminum salt and a citric acid aqueous solution, and adjusting the pH value to a proper range to prepare sol; then adding modified boron nitride into the sol, and ensuring uniform distribution of the modified boron nitride through ultrasonic dispersion treatment; then performing spray drying to obtain precursor powder; performing cold isostatic pressing on the precursor powder to obtain a cold-pressed blank; after presintering in an inert atmosphere, transferring into ammonia gas to carry out high-temperature nitridation reaction; and finally, carrying out pressureless sintering in an inert atmosphere to finally obtain the high-performance boron nitride and aluminum nitride composite ceramic. According to the method, the technological process is optimized, no extra sintering aid or complex treatment is needed, the uniformity and compactness of the material are remarkably improved, and the method has the advantages of being low in production cost and high in preparation efficiency.
本发明提供了一种氮化硼氮化铝复合陶瓷的制备方法，涉及陶瓷复合材料制备技术领域。所述方法包括将异丙醇铝溶解于异丙醇中，加入铝盐和柠檬酸水溶液，调整pH值至适宜范围制得溶胶；然后将改性氮化硼加入溶胶中，通过超声波分散处理确保其均匀分布；随后喷雾干燥得到前驱体粉末；接着将前驱体粉末冷等静压成型得到冷压坯；在惰性气氛中预烧结后，转移至氨气中进行高温氮化反应；最后在惰性气氛中进行无压烧结，最终得到高性能的氮化硼氮化铝复合陶瓷。本发明通过优化工艺流程，无需引入额外烧结助剂或复杂处理，实现了材料均匀性和致密度的显著提升，具有生产成本低、制备效率高的特点。
Preparation method of boron nitride and aluminum nitride composite ceramic
一种氮化硼氮化铝复合陶瓷的制备方法
HOU YUXUAN (Autor:in) / HOU GUANGSHENG (Autor:in) / LI PAN (Autor:in) / CHU ZONGFU (Autor:in) / LI WEI (Autor:in) / HUANG YU (Autor:in) / ZHOU PEIFANG (Autor:in) / ZANG BINGNA (Autor:in)
24.01.2025
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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