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Method for preparing high-strength aluminum nitride ceramic through low-temperature sintering
The invention discloses a method for preparing high-strength aluminum nitride ceramic through low-temperature sintering, and relates to the technical field of aluminum nitride ceramic preparation. The aluminum nitride ceramic prepared by the low-temperature sintering method provided by the invention is specifically prepared by the following steps: carrying out particle size grading on original powder to obtain aluminum nitride powder with the particle size range of 0.1-1.2 mu m and the average particle size of less than 0.5 mu m, and carrying out coating modification on a sintering aid and the ceramic powder in combination with a coating method to obtain the aluminum nitride ceramic. The preparation of the aluminum nitride ceramic with high density, fine grains and more uniform microstructure is facilitated, and the mechanical property and thermal shock resistance of the aluminum nitride ceramic are improved; in addition, hot isostatic pressing treatment is carried out at a low temperature after sintering is completed, grain growth of a ceramic sintered body can be effectively controlled on the premise that high densification is achieved, and the strength and hardness of the ceramic sintered body are further improved. According to the method, the high-strength aluminum nitride ceramic can be prepared under low-temperature sintering, the preparation cost of the aluminum nitride ceramic is reduced, and the method has high commercial value and practical significance.
本发明公开了一种低温烧结制备高强度氮化铝陶瓷的方法，涉及氮化铝陶瓷制备技术领域。本发明提供的低温烧结法制备得到的氮化铝陶瓷，具体是通过对原始粉体进行粒径分级，获得粒径范围在0.1～1.2μm、平均粒径尺寸小于0.5μm的氮化铝粉体，结合包覆法将烧结助剂与陶瓷粉体进行包覆改性，有助于制备致密度高、晶粒细小、微观结构更加均匀的氮化铝陶瓷，有助于提高其力学性能和抗热震性能；另外，本发明在烧结完成后用较低温度进行热等静压处理，可在达到高致密化的前提下，有效控制陶瓷烧结体的晶粒生长，进一步提高其强度和硬度。本发明可以实现在低温烧结下制备高强度氮化铝陶瓷，降低了氮化铝陶瓷的制备成本，具有较高商业价值及现实意义。
Method for preparing high-strength aluminum nitride ceramic through low-temperature sintering
The invention discloses a method for preparing high-strength aluminum nitride ceramic through low-temperature sintering, and relates to the technical field of aluminum nitride ceramic preparation. The aluminum nitride ceramic prepared by the low-temperature sintering method provided by the invention is specifically prepared by the following steps: carrying out particle size grading on original powder to obtain aluminum nitride powder with the particle size range of 0.1-1.2 mu m and the average particle size of less than 0.5 mu m, and carrying out coating modification on a sintering aid and the ceramic powder in combination with a coating method to obtain the aluminum nitride ceramic. The preparation of the aluminum nitride ceramic with high density, fine grains and more uniform microstructure is facilitated, and the mechanical property and thermal shock resistance of the aluminum nitride ceramic are improved; in addition, hot isostatic pressing treatment is carried out at a low temperature after sintering is completed, grain growth of a ceramic sintered body can be effectively controlled on the premise that high densification is achieved, and the strength and hardness of the ceramic sintered body are further improved. According to the method, the high-strength aluminum nitride ceramic can be prepared under low-temperature sintering, the preparation cost of the aluminum nitride ceramic is reduced, and the method has high commercial value and practical significance.
本发明公开了一种低温烧结制备高强度氮化铝陶瓷的方法，涉及氮化铝陶瓷制备技术领域。本发明提供的低温烧结法制备得到的氮化铝陶瓷，具体是通过对原始粉体进行粒径分级，获得粒径范围在0.1～1.2μm、平均粒径尺寸小于0.5μm的氮化铝粉体，结合包覆法将烧结助剂与陶瓷粉体进行包覆改性，有助于制备致密度高、晶粒细小、微观结构更加均匀的氮化铝陶瓷，有助于提高其力学性能和抗热震性能；另外，本发明在烧结完成后用较低温度进行热等静压处理，可在达到高致密化的前提下，有效控制陶瓷烧结体的晶粒生长，进一步提高其强度和硬度。本发明可以实现在低温烧结下制备高强度氮化铝陶瓷，降低了氮化铝陶瓷的制备成本，具有较高商业价值及现实意义。
Method for preparing high-strength aluminum nitride ceramic through low-temperature sintering
一种低温烧结制备高强度氮化铝陶瓷的方法
WU SHANGHUA (author) / QI YUJIE (author) / LIN KUNJI (author) / ZHANG WENDUO (author)
2023-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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