压电位移材料电场E_3和应变S_1的关系  

RELATIONSHIP BETWEEN ELECTRIC FIELD E-3 AND STRAIN S_1 OF PIEZOELECTRIC CERAMICS DISPLACEMENT MATERIALS

作　　者：孙清池[1] 左孝杰[1] 徐庭献[1] 王裕斌[1] 

机构地区：[1]天津大学材料学院

出　　处：《兵器材料科学与工程》2001年第3期7-10,共4页Ordnance Material Science and Engineering

基　　金：天津大学内燃机燃烧学国家重点实验室基金资助

摘　　要：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。The relationship between the electric field E 3 and the strain S 1 of both soft Pb(Sb 1/2 Nb 1/2 )ZrTiO 3 (SN)system and hard Pb(Mn 1/3 Sb 2/3 )ZrTiO 3(MS) systems piezoelectric ceramics has been studied. It is a linear relationship between S 1 and E 3 according to the piezoeleetric equation S 1=d 31 E 3 when a weaker electrical field is applied to both SN and MS ceramics. When a stronger electrical field is applied, the piezoelectric strain constant d 31 is no longer a constant. It has the maximum value when the E 3 is increase to a certain value,so we call this E 3 saturated electrical field E s. The depolarizing electric field of the soft SN piezoelectric ceramics is about 12.7kV/cm. This value is smaller than both the coercive electric field E c (13.6 kV/cm) and the saturated electric field E s (14 kV/cm).But the values of both the depolarizing electic field E d and the .Saturated eletric field E s of the hard MS piezoelectric ceramics are 24kV/cm,and it is stronger than the coercive electric field E c(18.6kV/cm).A large strain can be induced to the soft SN system ceramics even by a weaker electric field,while a stronger opposite electric field can be applied to the MS system piezoeleetric ceramics.

关 键 词：压电应变系统d31 退极化电场Ed 矫顽电场Ec 饱和电场Es 电滞回线 压电陶瓷 智能材料 SN系 MS系 

分 类 号：TB381[一般工业技术—材料科学与工程] TM282[电气工程—电工理论与新技术]