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研究了软性铌锑—锆钛酸铅Pb(Sb1/ 2 Nb1/ 2 )ZrTiO3 (简称SN)系及硬性锑锰—锆钛酸铅Pb(Mn1/ 3 Sb2 / 3 )ZrTiO3(简称MS)系压电陶瓷电场E3 和应变S1的关系。压电方程为S1=d3 1E3 ,在弱电场下为线性关系。随着电场增加 ,压电应变系数d3 1变大 ,从而不再是常数。当电场E3 增大到某一值时d3 1有极大值 ,我们称此电场为饱和电场Es。软性SN三元系压电陶瓷的退极化电场Ed 为 12 .7kV/cm ,小于它的矫顽场Ec(13.6kV/cm)以及d3 1极大值 (-45 7pC/N)时的饱和电场Es(14kV/cm)。而硬性MS三元系压电陶瓷的退极化电场Ed 和d3 1极大值 (- 2 0 2pC/N)时的饱和电场Es相等 ,均为 2 4kV/cm ,大于它的矫顽电场Ec(18.6kV/cm)。软性SN三元系压电陶瓷在较低的电场下就可产生很大的应变。而硬性MS三元系压电陶瓷可以施加很大的反向电场
The effects of soft niobium antimony-zirconium titanate Pb (Sb1 / 2 Nb1 / 2) ZrTiO3 (SN) and hard antimony manganese-lead zirconate titanate Pb (Mn1 / 3 Sb2 / 3) ZrTiO3 Relationship between piezoelectric ceramic E3 and strain. Piezoelectric equation S1 = d3 1E3, in a weak electric field is linear. As the electric field increases, the piezoelectric strain coefficient d3 1 becomes large so that it is no longer constant. When the electric field E3 increases to a certain value d3 1 has a maximum value, we call this electric field is the saturated electric field Es. The depolarization electric field Ed of soft SN ternary piezoelectric ceramics is 12.7kV / cm, less than its coercive field Ec (13.6kV / cm) and d3 1 max (-45 7pC / N) Saturated electric field Es (14 kV / cm). However, the depolarization electric field Ed and the saturated electric field ES at the dmax level (-202pC / N) of hard MS ternary piezoelectric ceramics are equal to 2 4kV / cm, which is larger than its coercive field Ec (18.6 kV / cm). Soft SN ternary piezoelectric ceramics in the lower electric field can produce a great strain. The rigid MS ternary piezoelectric ceramics can exert a large reverse electric field