| 摘要 |
A substituted barium-neodymium-titanium perovskite having a defect structure of the general composition <IMAGE> where the cations <IMAGE> include at least Ba<2+>, Nd<3+> and, if desired, one or more cations selected from the group consisting of Cs<1+>, Rb<1+>, Tl<+>, K<1+>, Pb<2+>, Ag<1+>, Sr<2+>, Na<1+>, Bi<3+>, La<3+>, Ca<2+>, Ce<3+>, Cd<2+> Pr<3+>, Nd <3+>, Sm<3+>, Eu<3+>, Gd<3+>, Th<4+>, Tb<3+>, Mn<2+>, Li<1+>, Dy<3+>, U<4+>, Y<3+>, Fe<2+>, Ho<3+>, Ce <4+ , Co<2+>, Zn<2+>, Er<3+>, Tm<3+>, Yb<3+>, and/or Lu<3+>, the cations <IMAGE> include at least titanium and, if desired, one or more cations selected from the group consisting of Mn<2+>, Cr<2+>, In<3+>, V<2+>, Fe<2+>, Pb<4+>, Li<1+>, Zr<4+>, Co<2+>, Sc<3+>, Zn<2+>, Cu<2+>, U<6+>, Mg<2+>, Hf <4+>, Mo<3+>, Sn<4+>, Ni<2+>, Nb<4+>, Ti<3+>, W<4+>, Mo<4+>, Fe<3+>, Mn<3+>, V<3+>, Re<4+>, Ir<4+>, Ru <4+ , W<5+>, Ta<5+>, Cr<3+>, Ga<3+>, Co<3+>, Mo<5+>, Ni<3+>, Sb<5+>, W<6+>, Nb<5+>, Mo<6+>, Fe<4+>, Re <5+>, V<4+>, Te<6+>, V<5+>, Cu<3+>, Al<3+>, Mn<4+>, Ge<4+>, and/or Re<7+> &squ& are cation vacancies and a1 + a2 + ... + an+1 = 1, 0.17 < an+1 < 0.30, b1 + b2 + ... + bn = 1 and a1<*>n<1> + a<2*>n<2> + ...+ a<n*>n<n> + b1 <* m<1> + b<2>m<2> + ... + b<m*>m<m> = 6, is an improved dielectric, ceramic material whose dielectric properties can be reliably reproduced and optimised for certain application areas. A dielectric, ceramic composition containing this substituted barium-neodymium-titanium perovskite is suitable as the ceramic dielectric of capacitors, e.g. NPO capacitors, and microwave components, in particular dielectric resonators. <IMAGE> |
