The dielectric ceramics with a main crystal phase of MgTiO3 and additional crystal phase of CaTiO3 were prepared by the conventional electronic ceramics technology. The structures of MgTiO3 are ilmenite-type, and belong to hexagonal syngony. The ratio of MgTiO3 to CaTiO3 can be adjusted to gain a zero temperature coefficient of εr and a higher εr for the system. The effects of B2O3 doping on the dielectric properties of MgTiO3-CaTiO3 (MCT) ceramics were investigated. The addition of B2O3 decreases the sintering temperature and results in rapid densification without obvious negative effect on the Q values of the system (Q=1/tan δ). B2O3 exists as liquid phase in the sintering process, promoting the reactions as a sintering agent.
参考文献
| [1] | V M Ferreira;F Azough;J L Baptista et al.Magnesium Titanate Microwave Dielectric Ceramics[J].FERROELECTRICS,1992,133:127. |
| [2] | V M Ferreira;J L Baptista;L Kamba et al.Dielectric Spctroscopy of MgTiO3-based Ceramics in the 109-1014Hz Region[J].JMaterSoc,1993,28:5894. |
| [3] | V.M.Ferreira;F.Azough .The effect of Cr and La on MgTiO3 and MgTiO3-CaTiO3 microwave dielectric ceramics[J].Journal of Materials Research,1997(12):3293-3299. |
| [4] | B W Hakki;P D Coleman .A dielectric resonator method of measuring inductive capacities in the millimeter range[J].Microwave Theory and Techniques,1960,8:402. |
| [5] | Cheng-Liang Huang;Ming-Hung Weng .Improved high Q value of MgTiO{sub}3-CaTiO{sub}3 microwave dielectric ceramics at low sintering temperature[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2001(15):2741-2750. |
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