| 摘要 |
PURPOSE:To obtain a piezoelectric porcelain composition of a high electrostriction effect by application of voltage and low hysteresis by adding specific quantities of NiO and/or Bi2O3 and MnO as auxiliary constituents to a specific basic composition. CONSTITUTION:0.02-0.5wt.% of NiO and/or Bi2O3 and 0.005-0.15wt.% of MnO are added as auxiliary constituents to a basic composition satisfying formula I. PbO, NiO, Nb2O5, ZnO, Sb2O3, ZrO2, TiO2, and the specified auxiliary constituents selected as starting materials are mixed in a ball mill and baked temporarily. Powder which is obtained by re-pulverization and to which a proper quantity of organic binder is added is pelletized, shaped by pressurization, and baked. |
