| 摘要 |
PURPOSE:To improve the electromechanical coupling coefficient by a method wherein the basic composition is represented by a molecular formula of Pb(ZrxTiy)O3 (where x+y=1) and within the range of 0.46<=y<=0.47 containing 0.5-1.5 weight% of Nb2O5. CONSTITUTION:In a molecular formula of Pb(ZrxTiy)O3 (where x+y=1), 0.5-1.5 weight% of Nb2O5 is contained within a composition range of 0.46<=y<=0.47. Within such a composition range, tetragonal and rhombohedral ferroelectric substances are mixed with each other in the Pb(ZrxTiy)O3 (0.46<=y<=0.47) to increase the electromechanical coupling coefficient Kp markedly. Furthermore, the piezoelectric characteristics can be extremely improved by adding Nb2O5. |
