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Method for preparing boride ultrahigh-temperature ceramic powder by hydrothermal-method-assisted molten salt method
The invention relates to a method for preparing boride ultrahigh-temperature ceramic powder by a hydrothermal-method-assisted molten salt method. The method comprises the following steps: preparing mixed powder of ZrO2 and boron powder by a hydrothermal method, and promoting a boro-thermal reduction reaction by a molten salt method to obtain high-purity ZrB2(HfB2) powder. The mixed powder of ZrO2and boron powder is prepared by adopting the hydrothermal method. Thus, ZrO2 and boron powder are mixed more uniformly, it is ensured that the later boro-thermal reduction reaction can be fully carried out, and the purity of the product is improved. Secondly, by combining the molten salt method, the method has the following three advantages: (1) the synthesis temperature can be obviously reduced and the reaction time can be obviously shortened; (2) the shape and the size of the particles can be controlled more easily. and (3) the reaction process of the molten salt method and a subsequent cleaning process are also beneficial to the elimination of impurities to form the high-purity reaction product.
本发明涉及一种水热法辅助熔盐法制备硼化物超高温陶瓷粉体的方法，首先采用水热法制备出ZrO2和硼粉的混合粉体，再借助熔盐法促进硼热还原反应进而制得高纯ZrB2(HfB2)粉体。采用水热法制备出ZrO2和硼粉的混合粉体。这样使得二者的混合更加均匀，确保后期硼热还原反应能充分进行，提高产物的纯度。其次，结合熔盐法又具有以下三点优势：(1)可以明显地降低合成温度和缩短反应时间。(2)可以更容易地控制颗粒的形状和尺寸。(3)熔盐法的反应过程以及随后的清洗过程中，也有利于杂质的消除，形成高纯的反应产物。
Method for preparing boride ultrahigh-temperature ceramic powder by hydrothermal-method-assisted molten salt method
The invention relates to a method for preparing boride ultrahigh-temperature ceramic powder by a hydrothermal-method-assisted molten salt method. The method comprises the following steps: preparing mixed powder of ZrO2 and boron powder by a hydrothermal method, and promoting a boro-thermal reduction reaction by a molten salt method to obtain high-purity ZrB2(HfB2) powder. The mixed powder of ZrO2and boron powder is prepared by adopting the hydrothermal method. Thus, ZrO2 and boron powder are mixed more uniformly, it is ensured that the later boro-thermal reduction reaction can be fully carried out, and the purity of the product is improved. Secondly, by combining the molten salt method, the method has the following three advantages: (1) the synthesis temperature can be obviously reduced and the reaction time can be obviously shortened; (2) the shape and the size of the particles can be controlled more easily. and (3) the reaction process of the molten salt method and a subsequent cleaning process are also beneficial to the elimination of impurities to form the high-purity reaction product.
本发明涉及一种水热法辅助熔盐法制备硼化物超高温陶瓷粉体的方法，首先采用水热法制备出ZrO2和硼粉的混合粉体，再借助熔盐法促进硼热还原反应进而制得高纯ZrB2(HfB2)粉体。采用水热法制备出ZrO2和硼粉的混合粉体。这样使得二者的混合更加均匀，确保后期硼热还原反应能充分进行，提高产物的纯度。其次，结合熔盐法又具有以下三点优势：(1)可以明显地降低合成温度和缩短反应时间。(2)可以更容易地控制颗粒的形状和尺寸。(3)熔盐法的反应过程以及随后的清洗过程中，也有利于杂质的消除，形成高纯的反应产物。
Method for preparing boride ultrahigh-temperature ceramic powder by hydrothermal-method-assisted molten salt method
一种水热法辅助熔盐法制备硼化物超高温陶瓷粉体的方法
FU QIANGANG (author) / ZHOU LEI (author) / LI HEJUN (author) / ZHANG JIAPING (author) / WEI YALONG (author) / TONG MINGDE (author) / HU DOU (author) / LI XINGANG (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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