CAJ | 학술논문

研究了锰掺杂对PZT材料微结构及压电性能的影响, 并用ESR确定了锰在PZT材料中的价态. 结果表明，锰在PZT材料中主要以Mn2+和Mn3+的方式共存. 锰在PZT陶瓷材料中的“溶解度”约为1.5mol%. 锰含量<0.5mol%时, Mn将以Mn2+和Mn3+的方式优先进入晶格Pb位, 使材料的压电性能提高，表现出施主杂质特性；锰浓度处于0.5～1.5 mol%时, 部分Mn将以Mn3+或Mn2+的方式进入晶格中(Zr，Ti)位，而此浓度范围内锰掺杂的PZT材料同时表现出“软性”和“硬性”材料的压电特性. 锰含量>1.5 mol%时, 过量的Mn将在晶界积聚，使压电活性降低. 少量Fe的存在，可使Mn离子的溶解度降低，并起到抑制Mn2+和Mn3+氧化的作用.
연구료맹참잡대PZT재료미결구급압전성능적영향, 병용ESR학정료맹재PZT재료중적개태. 결과표명，맹재PZT재료중주요이Mn2+화Mn3+적방식공존. 맹재PZT도자재료중적“용해도”약위1.5mol%. 맹함량<0.5mol%시, Mn장이Mn2+화Mn3+적방식우선진입정격Pb위, 사재료적압전성능제고，표현출시주잡질특성；맹농도처우0.5～1.5 mol%시, 부분Mn장이Mn3+혹Mn2+적방식진입정격중(Zr，Ti)위，이차농도범위내맹참잡적PZT재료동시표현출“연성”화“경성”재료적압전특성. 맹함량>1.5 mol%시, 과량적Mn장재정계적취，사압전활성강저. 소량Fe적존재，가사Mn리자적용해도강저，병기도억제Mn2+화Mn3+양화적작용.
The effects of manganese addition on the microstructure and piezoelectric properties of PZT were studied. The valence states of manganese were also measured by ESR. It shows that manganese coexists mainly in Mn2+ and Mn3+ in PZT ceramics. The solubility limit of MnO in PZT ceramics is about 1.5mol%. Mn ion is preferentially incorporated in the lattice Pb site in Mn2+ or Mn3+ acted as donor when the concentration of Mn ion is below 0.5mol%, which will improve the piezoelectric properties. In the concentration region of 0.5-1.5mol%, some Mn ion will be incorporated in the lattice of (Ti , Zr) site in Mn3+ or Mn+2 acted as acceptor, and correspondingly the Mn-doped PZT ceramics exhibit properties of both “soft” and “hard” piezoelectrics simultaneously. When the concentration of Mn ion is larger than 1.5mol%, it will accumulate at the grain boundaries and give rise to the decrease of piezoelectric properties of PZT ceramics. Small amount of Fe may decrease the solubility limit of Mn ion in PZT ceramics and it may also prevent the oxidation of Mn2+ and Mn3+.