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Rare earth hafnate high-entropy ceramic powder through low-temperature synthesis and preparation method
The invention relates to rare earth hafnate high-entropy ceramic powder through low-temperature synthesis and a preparation method, wherein the chemical formula of the rare earth hafnate high-entropyceramic powder is (5RE0.2)2Hf2O7, and rare earth elements RE are La, Ce, Nd, Pr, Sm and Eu. The preparation method specifically comprises the following steps: by taking hafnium tetrachloride (HfCl4) and hydrated rare earth nitrate (RE(NO3)3.xH2O) as raw materials and selecting urea as a combustion agent, mixing the components in a solution, combusting in an air atmosphere at a low temperature to generate fluffy powder, and carrying out high-temperature carbon removal treatment to obtain high-purity (5RE0.2)2Hf2O7 powder. Compared with high-energy ball milling, spray pyrolysis, coprecipitationand other oxide high-entropy ceramic synthesis methods, the method has the advantages of low synthesis temperature, simple operation, high preparation speed and the like.
本发明涉及一种低温合成稀土铪酸盐高熵陶瓷粉体及制备方法，稀土铪酸盐高熵陶瓷的化学式为(5RE0.2)2Hf2O7,其中稀土元素RE＝La,Ce,Nd,Pr,Sm,Eu。本发明具体的制备过程如下：以四氯化铪(HfCl4)和水合稀土硝酸盐(RE(NO3)3·xH2O)为原料，选用尿素作为燃烧剂，经溶液混合，在空气气氛和低温条件下，燃烧生成蓬松状的粉末，经高温除碳处理后，得到高纯度(5RE0.2)2Hf2O7粉末。该方法较高能球磨、喷雾热解和共沉淀等氧化物高熵陶瓷合成方法，具有合成温度低，操作简单和制备速度快等优点。
Rare earth hafnate high-entropy ceramic powder through low-temperature synthesis and preparation method
The invention relates to rare earth hafnate high-entropy ceramic powder through low-temperature synthesis and a preparation method, wherein the chemical formula of the rare earth hafnate high-entropyceramic powder is (5RE0.2)2Hf2O7, and rare earth elements RE are La, Ce, Nd, Pr, Sm and Eu. The preparation method specifically comprises the following steps: by taking hafnium tetrachloride (HfCl4) and hydrated rare earth nitrate (RE(NO3)3.xH2O) as raw materials and selecting urea as a combustion agent, mixing the components in a solution, combusting in an air atmosphere at a low temperature to generate fluffy powder, and carrying out high-temperature carbon removal treatment to obtain high-purity (5RE0.2)2Hf2O7 powder. Compared with high-energy ball milling, spray pyrolysis, coprecipitationand other oxide high-entropy ceramic synthesis methods, the method has the advantages of low synthesis temperature, simple operation, high preparation speed and the like.
本发明涉及一种低温合成稀土铪酸盐高熵陶瓷粉体及制备方法，稀土铪酸盐高熵陶瓷的化学式为(5RE0.2)2Hf2O7,其中稀土元素RE＝La,Ce,Nd,Pr,Sm,Eu。本发明具体的制备过程如下：以四氯化铪(HfCl4)和水合稀土硝酸盐(RE(NO3)3·xH2O)为原料，选用尿素作为燃烧剂，经溶液混合，在空气气氛和低温条件下，燃烧生成蓬松状的粉末，经高温除碳处理后，得到高纯度(5RE0.2)2Hf2O7粉末。该方法较高能球磨、喷雾热解和共沉淀等氧化物高熵陶瓷合成方法，具有合成温度低，操作简单和制备速度快等优点。
Rare earth hafnate high-entropy ceramic powder through low-temperature synthesis and preparation method
一种低温合成稀土铪酸盐高熵陶瓷粉体及制备方法
ZHANG SHOUYANG (author) / CONG LONGKANG (author) / GU SHENGYUE (author) / LI WEI (author) / LI HEJUN (author)
2020-11-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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