A ceramic piezoelectric material that exchanges mechanical vibration with an alternating electric field. The material is often a solid solution of PbZrO3 and PbTiO3 (abbreviated as PZT), or PZT with the addition of Pb(Mg1/3Nb1/3) O3 , Pb(Mn1/3Sb1/3) O3 , or Pb(Co1/3Nb1/3) O3 . The crystal structure of these solid solutions is perovskite ( CaTiO3 ) type, and is abbreviated as ABO3 . A contains larger ions such as Pb2 + , Ba2 + , Sr2 + and Ca2 + , and B contains small ions such as Ti4 + , Zr4 + , Hf4 + , Mg2 + , Nb5 + , Mn2 + , Sb5 + and Co2 + , but as long as the ratio of the number of atoms in A:B is 1:1, the same crystal will be maintained, which has the advantage that a solid solution with a composition according to the desired physical properties can be selected and synthesized. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
機械的振動と交流電場との交換を行う圧電性材料を,セラミックスで作ったもの。物質としては,PbZrO3とPbTiO3との固溶体(PZTと略称),あるいはPZTにPb(Mg1/3Nb1/3)O3,Pb(Mn1/3Sb1/3)O3,Pb(Co1/3Nb1/3)O3などを加えているものが多い。これらの固溶体の結晶構造はペロブスカイト(CaTiO3)型でありABO3と略記される。Aには大きいイオンであるPb2+,Ba2+,Sr2+,Ca2+などが入り,Bには小さいイオンであるTi4+,Zr4+,Hf4+,Mg2+,Nb5+,Mn2+,Sb5+,Co2+などが入るが,原子数の比がA:Bで1:1でありさえすれば同じ結晶を保てるから,所望の物性値に応じた組成の固溶体を選択・合成できる利点がある。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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