| 主权项 |
1. A material comprising:
a ceramic material having the empirical formula A′1−b−cB′bC′c where: 0<b≦0.5 and 0<c≦0.01; wherein A′ represents the composition Pb(ZraTi1−a)O3 and 0.5≦a≦0.6 and A′ serves as host lattice for B′ and C′, B′ is an additive component of the perovskite lattice type and is selected from the following components:
KNbO3,Pb(MII1/2MVI1/2)O3) where MII is Zn, Co, Ni, Mn or Cu and where MVI is W,Pb(MIII1/2MV1/2)O3 where MIII is Fe, Mn, Cr, or Ga and MV is Nb, Ta, or Sb,Pb(MIII1/2MVI1/3)O3 where MIII is Fe, Mn, Cr, or Ga and MVI is W,Pb(LiI1/4MV3/4)O3 where MV is Nb, Ta or Sb, C′ is a ceramic material of the cryolite lattice type which has the general formula
A4(B2−2x/3Nb2+2x/3)O11+xV1−x, where A comprises barium or strontium, where B comprises strontium, magnesium, or calcium, where V comprises an oxygen vacancy having a phase range and the parameter x is such that: 0≦x<1. |
