MICROWAVE CHARACTERISTICS OF MIXED PHASES OF BATI4O9-BAPR2TI4O12 CERAMICS

The microwave characteristics of the BaTi4O9-BaPr2Ti4O12 system were i nvestigated, including its microstructure and infrared reflection spec troscopy. It was found that this system is entirely composed of two ph ases, BaTi4O9 and BaPr2Ti4O12, and it is suggested that the lattices o f each phase are well matched obliquely at the interface in the sinter ed ceramics. The dielectric properties are compared with calculated va lues deduced from the mixing relations of the two components. Furtherm ore, the infrared reflection spectra of this system were analysed with the factorized form of the dielectric function, for the purpose of st udying the applicability of the reflection analysis technique to this mixed phase system.