誘電率の温度変化が小さい低酸素分圧焼成用Pb系誘電体セラミックス : 物性・応用

概要

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Materials and properties of ceramics in the system Pb(Zn_<1/3>Nb_<2/3>)O_3-SrTiO_3that contained Pb(Cu, Mn, Nb)O_3 were studied. Comparing with Pb(Zn_<1/3>Nb_<2/3>)O_3-SrTiO_3binary system, temperature coefficient of dielectric constant decreased by incorporating Pb(Cu, Mn, Nb)O_3. This is probably because the atomic species forming perovskite increased then the phase transition of dielectric got more diffused. Cu^<1+> emphasized this effect than Cu^<2+> or another atoms. Furthermore, we found Cu or Mn promoted aging of dielectrics and changed the temperature dependence curve of dielectric constant to a double peak. The ceramics developed in the system Pb(Zn_<1/3>Nb_<2/3>)O_3-SrTiO_3-Pb{(Cu_<1-x>Mn_x)Nb_<2/3>}O_3 had a high density and a high resistivity when fired in atmospheres of low oxygen partial pressure below 1000℃.
社団法人日本セラミックス協会の論文
1990-08-01