Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics
Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics
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C04B 35/462, C04B 35/468, C04B 35/622
Tsinghua Univ.
Li Longtu, Li Enzhu, Chu Xiangcheng
Key Words:
Bismuth-sodium, titanate-bismuth potassium, titanate barium zirconate titanate, lead free, ceramics
The present invention discloses a kind of environment friendly lead-free bismuth sodium titanate-bismuth potassium tatanate-barium zirconate titanate piezoelectric ceramic in functional ceramic preparing technology. The lead-free piezoelectric ceramic has the general expression of (1-x)Bi1/2(Na1-zKz)1/2TiO3-xBa(ZryTi1-y)O3, where, x is BZT molar content, y is atom number of Zr to replace Ti in BaTiO3, z is atom number of K to replace Na in BaNaO3, x is 0-0.1, y is 0-0.10 and z is 0-0.05. The lead-free piezoelectric ceramic may be prepared with industrial materials and through traditional piezoelectric ceramic preparing technological process. The lead-free piezoelectric ceramic has d33 up to 16pC/N, Curie temperature up to 270 deg c and practical application value.

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