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Preparation method for synthesizing lanthanum hafnate powder by using sol-gel process
The invention relates to a preparation method for synthesizing lanthanum hafnate powder by using a sol-gel process. The method comprises the following steps: dissolving hafnium tetrachloride (HfCl4) and lanthanum nitrate hydrate (La(NO3)3.xH2O) in deionized water, conducting sufficient stirring, adding a certain amount of citric acid powder, and performing stirring at 50-80 DEG C for 1-3 hours toform sol; weighing a certain amount of ethylene glycol, dissolving the ethylene glycol in the solution obtained in the step 1, and carrying out stirring for 2-4 hours at a temperature of 70-90 DEG C to form gel; and fully drying the gel obtained in the step 2, and calcining the gel at a temperature of 800-100 DEG C for 8-10 hours to obtain the lanthanum hafnate (La2Hf2O7) powder. The preparation method disclosed by the invention has the advantages of controllable chemical components of the synthetic powder, low calcining temperature, good uniformity, high purity and the like.
本发明涉及一种溶胶凝胶法合成铪酸镧粉体的制备方法，工艺过程如下：将四氯化铪(HfCl4)和水合硝酸镧(La(NO3)3·xH2O)溶于去离子水中，充分搅拌后，加入一定量的柠檬酸粉末，在50～80℃条件下搅拌1～3h，形成溶胶；称取一定量的乙二醇溶于步骤一获得溶液中，在70～90℃条件下搅拌2～4h，形成凝胶；步骤三：步骤二所获得凝胶充分干燥，置于温度为800～100℃的条件下煅烧8～10h，即可获得铪酸镧(La2Hf2O7)粉体。本发明所述的制备工艺具有合成粉体化学成分可控、锻烧温度偏低、均匀性好和纯度高等优点。
Preparation method for synthesizing lanthanum hafnate powder by using sol-gel process
The invention relates to a preparation method for synthesizing lanthanum hafnate powder by using a sol-gel process. The method comprises the following steps: dissolving hafnium tetrachloride (HfCl4) and lanthanum nitrate hydrate (La(NO3)3.xH2O) in deionized water, conducting sufficient stirring, adding a certain amount of citric acid powder, and performing stirring at 50-80 DEG C for 1-3 hours toform sol; weighing a certain amount of ethylene glycol, dissolving the ethylene glycol in the solution obtained in the step 1, and carrying out stirring for 2-4 hours at a temperature of 70-90 DEG C to form gel; and fully drying the gel obtained in the step 2, and calcining the gel at a temperature of 800-100 DEG C for 8-10 hours to obtain the lanthanum hafnate (La2Hf2O7) powder. The preparation method disclosed by the invention has the advantages of controllable chemical components of the synthetic powder, low calcining temperature, good uniformity, high purity and the like.
本发明涉及一种溶胶凝胶法合成铪酸镧粉体的制备方法，工艺过程如下：将四氯化铪(HfCl4)和水合硝酸镧(La(NO3)3·xH2O)溶于去离子水中，充分搅拌后，加入一定量的柠檬酸粉末，在50～80℃条件下搅拌1～3h，形成溶胶；称取一定量的乙二醇溶于步骤一获得溶液中，在70～90℃条件下搅拌2～4h，形成凝胶；步骤三：步骤二所获得凝胶充分干燥，置于温度为800～100℃的条件下煅烧8～10h，即可获得铪酸镧(La2Hf2O7)粉体。本发明所述的制备工艺具有合成粉体化学成分可控、锻烧温度偏低、均匀性好和纯度高等优点。
Preparation method for synthesizing lanthanum hafnate powder by using sol-gel process
一种溶胶凝胶法合成铪酸镧粉体的制备方法
ZHANG SHOUYANG (author) / CONG LONGKANG (author) / GU SHENGYUE (author) / LI WEI (author) / LI HEJUN (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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