Li₂CO₃ 첨가에 따른 Mg？Ta₄O₁？ 세라믹스의 소결 특성 = Sintering Properties of the Mg？Ta₄O₁？ Ceramics with Li₂CO₃ Additions

다국어 초록 (Multilingual Abstract)

In this study, the sintering properties and structural properties of the Mg？Ta₄O₁？ cation-deficient perovskite ceramics with Li₂CO₃ additions are investigated. The cation-deficient perovskite ceramics are prepared through the solid-state route. According to the XRD pattern, Mg₄Ta₂O？, MgTa₂O？ and Mg？Ta₄O₁？ phase existed in sintered pure Mg？Ta₄O₁？ ceramics. With Li₂CO₃ additions, the peak intensities of Mg₄Ta₂O？ and MgTa₂O？ phase were reduced. Also, diffraction intensity of the Mg？ Ta₄O₁？ phase was increased with increments of Li₂CO₃ additions. The bulk densities were increased with increasing of Li₂CO₃ amount and approach the theoretical density of the Mg？Ta₄O₁？ ceramics, more and more. Microstructure of the Mg？Ta₄O₁？ ceramics were densified more and more by additions of Li₂CO₃. The bulk density of Mg？Ta₄O₁？+5wt% Li₂CO₃ ceramics sintered at 1500℃ for 10 hours was 5.88 g/㎤.