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Preparation method of ultrahigh-temperature ceramic composite powder
According to the preparation process, the ZrB2-SiC ultrahigh-temperature composite ceramic is synthesized through combustion in a high-pressure argon atmosphere, the oxygen content of the composite ceramic can be controlled to be lower than 1%, the purity of synthesized powder is high, the particle size of the powder is small and ranges from 5 nm to 500 nm, and the high-temperature resistance and application durability of the material can be improved. Compared with the conventional in-situ synthesis method, the powder prepared by the method is generally in a micron level, and the oxygen content is inevitably increased in the reaction process because the reaction atmosphere is not concerned after the vacuum is pumped to a certain degree in the reaction process, so that the performance is influenced.
本发明公开了一种ZrB2‑SiC超高温复合陶瓷的制备工艺，通过在高压氩气气氛下燃烧合成ZrB2‑SiC超高温复合陶瓷，能够控制复合陶瓷的含氧量低于1％，合成粉体纯度高，粉体粒径小，为5‑500nm，有利于提高材料的耐高温性能以及应用的持久性；相比于常规原位合成法制备的粉体通常在微米级别，由于反应过程中通常抽真空达到一定程度后即不在关注反应气氛，必然会导致反应过程中氧含量的增加，从而影响性能。
Preparation method of ultrahigh-temperature ceramic composite powder
According to the preparation process, the ZrB2-SiC ultrahigh-temperature composite ceramic is synthesized through combustion in a high-pressure argon atmosphere, the oxygen content of the composite ceramic can be controlled to be lower than 1%, the purity of synthesized powder is high, the particle size of the powder is small and ranges from 5 nm to 500 nm, and the high-temperature resistance and application durability of the material can be improved. Compared with the conventional in-situ synthesis method, the powder prepared by the method is generally in a micron level, and the oxygen content is inevitably increased in the reaction process because the reaction atmosphere is not concerned after the vacuum is pumped to a certain degree in the reaction process, so that the performance is influenced.
本发明公开了一种ZrB2‑SiC超高温复合陶瓷的制备工艺，通过在高压氩气气氛下燃烧合成ZrB2‑SiC超高温复合陶瓷，能够控制复合陶瓷的含氧量低于1％，合成粉体纯度高，粉体粒径小，为5‑500nm，有利于提高材料的耐高温性能以及应用的持久性；相比于常规原位合成法制备的粉体通常在微米级别，由于反应过程中通常抽真空达到一定程度后即不在关注反应气氛，必然会导致反应过程中氧含量的增加，从而影响性能。
Preparation method of ultrahigh-temperature ceramic composite powder
一种超高温陶瓷复合粉体制备方法
YANG XIAO (Autor:in) / LI YONG (Autor:in) / ZHANG GUANNAN (Autor:in) / MENG QING (Autor:in) / YANG ZENGCHAO (Autor:in) / HE GANG (Autor:in) / SHUANG SHUANG (Autor:in) / CHEN YIXIANG (Autor:in) / LI JIANGTAO (Autor:in)
22.04.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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