| 摘要 |
PURPOSE:To produce the titled powder capable of providing a dense sintered material having pyroelectric properties by normal pressure sintering at relatively low temperature, by obtaining precipitate containing Pb, Zr, Ti, Mn and Nb by multi-stage wet method and calcining the precipitate. CONSTITUTION:Precipitate containing 1-4 elements selected from Pb, Zr, Ti, Mn and Nb is formed from a solution containing the 1-4 elements and, in a state wherein the prepared precipitate is dispersed, precipitate containing a least one of the 4-1 elements among the 5 elements is formed from a solution containing at least 1 element among the remaining 4-1 element. The operation is carried out for necessary time to precipitate the total five elements. Then, the precipitate is calcined to give the titled fine powder having a composition shown by formula (0.01<=A<=0.3; 0.54<=x<=0.95; 0.25<=y<=0.55). The fine powder has small particle diameter and readily sintering properties and can produce a porcelain by sintering at relatively low temperature and at normal pressure. The prepared porcelain has improved pyroelectric properties and is useful as a piezoelectric material. |
