摘要
The dielectric ceramics with a main crystal phase of MgTiO 3 and additional crystal phase of CaTiO 3 were prepared by the conventional electronic ceramics technology. The structures of MgTiO 3 are ilmenite-type, and belong to hexagonal syngony. The ratio of MgTiO 3 to CaTiO 3 can be adjusted to gain a zero temperature coefficient of ε r and a higher ε r for the system. The effects of B 2O 3 doping on the dielectric properties of MgTiO 3-CaTiO 3 (MCT) ceramics were investigated. The addition of B 2O 3 decreases the sintering temperature and results in rapid densification without obvious negative effect on the Q values of the system (Q=1/tan δ). B 2O 3 exists as liquid phase in the sintering process, promoting the reactions as a sintering agent.
The dielectric ceramics with a main crystal phase of MgTiO 3 and additional crystal phase of CaTiO 3 were prepared by the conventional electronic ceramics technology. The structures of MgTiO 3 are ilmenite-type, and belong to hexagonal syngony. The ratio of MgTiO 3 to CaTiO 3 can be adjusted to gain a zero temperature coefficient of ε r and a higher ε r for the system. The effects of B 2O 3 doping on the dielectric properties of MgTiO 3-CaTiO 3 (MCT) ceramics were investigated. The addition of B 2O 3 decreases the sintering temperature and results in rapid densification without obvious negative effect on the Q values of the system (Q=1/tan δ). B 2O 3 exists as liquid phase in the sintering process, promoting the reactions as a sintering agent.
基金
FundedbyProjectofNational"86 3"Plan(No.2 0 0 2AA32 5 110 )
