| 摘要 |
PURPOSE:To obtain a ceramic which has electric anisotropy and wxcellent dielectric and piezoelectric characteristics by using crystal particles whose orientation is in the direction of an axis C as for a three-constituent piezoelectric material to which a composite compound is added as a PbTiO3-PbZrO3 system constituent or the 3rd constituent. CONSTITUTION:Strong-acid TiCl3 kept at 95 deg.C is turned to be a white deposite with the air blown thereon, is washed sufficiently by water, filtered and dried, and thus a needle-shaped TiO2 is prepared. Next, this TiO2 (PbCOOH)2.2H2O whose average diameter of particle is 0.2mum and ZrO2 whose average diameter of particle The sheet is 0.1mum are mixed so that the composition thereof be Pb(Ti0.65Zr0.35)O3 and, then are placed under heat treatment, and later are crushed to form the particles of piezoelectric material. After that, butyral resin, phthalate di-n-butyl and isopropyl alcohol are added to the particles, which are formed by extrusion into a raw sheet. is placed under heat treatment and sintered with an organic binder being scattered thereon simultaneously. In this way, the ceramic wherein almost all the crystal particles are oriented in the direction of an axis C is obtained and the piezoelectric characteristic thereof is found to be excellent. |
