Multi-component system nonleaded piezoelectric ceramic with good performance

Abstract

The polycomponent lead-free piezoelectric ceramic composition with excellent performance is one perovskite type environment consistency piezoelectric ceramic composition. The composition has the general expression of (1-e-f-g)(Bi1-uLu)1-w(Na1-x-yKxLiy)wTiO3+eBaTiO3+fSrTiO3+gCaTiO3+aMalphaObeta, where x is 0-1, y 0-0.5, u 0-0.12, (x+y) 0-1, e 0-1, f 0-1, g 0-1, (e+f+g) 0-1, w 0.3-0.7, L is RE elements La, Ce, Pr, Nd, Sm, etc.; MalphaObeta is doping oxide(s) in the content an of 0-10 %; M is +1~+6 valent element capable of forming solid oxide, such as Na, K, Li, Zn, Cr, etc. with alpha and beta being atom number. The piezoelectric ceramic composition has d33 up to 200 pC / N, kp up to 36.0 % and stable technological process, may be produced via traditional piezoelectric ceramic preparation process and industrial material, and is practical.

Description

1. Technical field

[0001] The invention relates to a novel multi-component lead-free piezoelectric ceramic composition, which belongs to the field of piezoelectric ceramics with perovskite structure and environment coordination. 2. Background technology

[0002] Since the discovery of the piezoelectricity of barium titanate ceramics in the mid-1940s, the structural characteristics are ABO 3 The research and development of piezoelectric ceramics is very active. Piezoelectric ceramics and their components have been widely used in industry, especially in the field of information industry. Lead zirconate titanate (Pb(Ti, Zr)O 3 ) as the representative lead-based binary system, the A site is Pb; the B site is Ti, Zr and lead zirconate titanate (Pb(Ti, Zr)O 3 ) as the base material, add the third component, such as lead magnesium niobate-lead titanate [Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 ] as a representative, the A position is Pb, and the B position is Mg 1 / 3 Nb 2 / 3 The lead-b...

Images