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Preparation method of potassium sodium niobate based leadless piezoelectric ceramic
The invention relates to the preparation of leadless piezoelectric materials, and in particular to a preparation method of a potassium sodium niobate based leadless piezoelectric ceramic. The preparation technology of a precursor sol and the sintering process of ceramic chip have an important effect on the properties of ceramic. The preparation of the precursor sol uses citric acid as a complexing agent and uses ethylene glycol as an esterifying agent; and the proportion of citric acid and ethylene glycol to Nb<5+> is as below: n(CA):n(Nb<5+>)=1:1-5:1, and n(CA):n(EG)=1:1-5:1. The sintering temperature is 1000 to 1140 DEG C, and insulation sintering is conducted at the sintering temperature of 0-5 h. The sol-gel method for preparation of the piezoelectric ceramic material overcomes the defects of a traditional solid phase method, and has the advantages of low cost, and simple preparation process and equipment. Compared to the traditional solid phase method, the piezoelectric ceramic material prepared by the sol-gel method can reduce the sintering temperature, thereby reducing the volatilization of the alkali metal elements and improving the performance of ceramic. The leadless piezoelectric ceramic does not damage human health in the production, usage and waste processing processes, or pollute the ecologic environment, and can satisfy the requirement of sustainable social development.
Preparation method of potassium sodium niobate based leadless piezoelectric ceramic
The invention relates to the preparation of leadless piezoelectric materials, and in particular to a preparation method of a potassium sodium niobate based leadless piezoelectric ceramic. The preparation technology of a precursor sol and the sintering process of ceramic chip have an important effect on the properties of ceramic. The preparation of the precursor sol uses citric acid as a complexing agent and uses ethylene glycol as an esterifying agent; and the proportion of citric acid and ethylene glycol to Nb<5+> is as below: n(CA):n(Nb<5+>)=1:1-5:1, and n(CA):n(EG)=1:1-5:1. The sintering temperature is 1000 to 1140 DEG C, and insulation sintering is conducted at the sintering temperature of 0-5 h. The sol-gel method for preparation of the piezoelectric ceramic material overcomes the defects of a traditional solid phase method, and has the advantages of low cost, and simple preparation process and equipment. Compared to the traditional solid phase method, the piezoelectric ceramic material prepared by the sol-gel method can reduce the sintering temperature, thereby reducing the volatilization of the alkali metal elements and improving the performance of ceramic. The leadless piezoelectric ceramic does not damage human health in the production, usage and waste processing processes, or pollute the ecologic environment, and can satisfy the requirement of sustainable social development.
Preparation method of potassium sodium niobate based leadless piezoelectric ceramic
WENXIN MA (Autor:in) / GUOYUAN CHENG (Autor:in) / XINGHUA FU (Autor:in) / WENHONG TAO (Autor:in) / LIPING ZHAO (Autor:in)
24.02.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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