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Preparation method for synthesizing lanthanum hafnate powder by molten salt method
The invention relates to a preparation method for synthesizing lanthanum hafnate powder by a molten salt method, which comprises the following steps: dissolving hafnium tetrachloride (HfCl4) and lanthanum nitrate hydrate (La (NO3) 3.xH2O) in deionized water, drying a coprecipitation mixture obtained under the action of ammonia water, mixing with a molten salt medium, grinding, treating in a mufflefurnace, soaking in deionized water, centrifuging, and drying white precipitate to obtain the high-purity lanthanum hafnate (La2Hf2O7) powder. The technological process also has the advantages that the operation is simple, the preparation period is short, the purity and crystallinity of the synthesized ceramic powder are high, the prepared powder does not need to be subjected to heat treatment, and the like. The La2Hf2O7 powder which is uniform in particle size, high in purity and good in crystallinity can be prepared under the low-temperature condition. And the problems of high energy consumption, complex process, long preparation period and the like of the traditional process are well solved.
本发明涉及一种熔盐法合成铪酸镧粉体的制备方法，将四氯化铪(HfCl4)和水合硝酸镧(La(NO3)3·xH2O)，溶于去离子水中，在氨水作用下获得的共沉淀混合物，干燥后与熔盐介质混合研磨，在马弗炉中处理后经过去离子水中浸泡，离心白色沉淀烘干后，获得高纯度铪酸镧(La2Hf2O7)粉末。本发明工艺流程还具有操作简单、制备周期短、合成的陶瓷粉末纯度和结晶度高和制备得到的粉末无需再进行热处理等优点。可以实现在低温条件下，制备得到颗粒尺寸均匀、纯度高和结晶性好的La2Hf2O7粉体。很好地克服了传统工艺耗能高、工艺复杂和制备周期长等问题。
Preparation method for synthesizing lanthanum hafnate powder by molten salt method
The invention relates to a preparation method for synthesizing lanthanum hafnate powder by a molten salt method, which comprises the following steps: dissolving hafnium tetrachloride (HfCl4) and lanthanum nitrate hydrate (La (NO3) 3.xH2O) in deionized water, drying a coprecipitation mixture obtained under the action of ammonia water, mixing with a molten salt medium, grinding, treating in a mufflefurnace, soaking in deionized water, centrifuging, and drying white precipitate to obtain the high-purity lanthanum hafnate (La2Hf2O7) powder. The technological process also has the advantages that the operation is simple, the preparation period is short, the purity and crystallinity of the synthesized ceramic powder are high, the prepared powder does not need to be subjected to heat treatment, and the like. The La2Hf2O7 powder which is uniform in particle size, high in purity and good in crystallinity can be prepared under the low-temperature condition. And the problems of high energy consumption, complex process, long preparation period and the like of the traditional process are well solved.
本发明涉及一种熔盐法合成铪酸镧粉体的制备方法，将四氯化铪(HfCl4)和水合硝酸镧(La(NO3)3·xH2O)，溶于去离子水中，在氨水作用下获得的共沉淀混合物，干燥后与熔盐介质混合研磨，在马弗炉中处理后经过去离子水中浸泡，离心白色沉淀烘干后，获得高纯度铪酸镧(La2Hf2O7)粉末。本发明工艺流程还具有操作简单、制备周期短、合成的陶瓷粉末纯度和结晶度高和制备得到的粉末无需再进行热处理等优点。可以实现在低温条件下，制备得到颗粒尺寸均匀、纯度高和结晶性好的La2Hf2O7粉体。很好地克服了传统工艺耗能高、工艺复杂和制备周期长等问题。
Preparation method for synthesizing lanthanum hafnate powder by molten salt method
一种熔盐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)
2021-01-01
Patent
Electronic Resource
Chinese
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