MgO가 첨가된(Ca,Sr)(Zr,Ti)O₃의 결정구조, 미세구조 및 저손실 유전특성 = Crystal structure, microstructure, and low-loss dielectric property of MgO-added (Ca,Sr)(Zr,Ti)O₃

다국어 초록 (Multilingual Abstract)

Crystal structure, microstructure, and dielectric properties of the (Ca, Sr)(Zr, Ti)O3 (CSZT) system has been studied as a function of sintering temperature and MgO addition for microwave applications. A single-phase CSZT powder with the orthorhombic crystal structure was obtained by the solid-state reaction method. The powder compacts were sintered at 1200°C, 1300°C, and 1400°C respectively. All the sintered samples had a single-phase orthorhombic crystal structure and grain size increased with sintering temperature. In the case of 1 mol% MgO addition, the orthorhombic crystal structure was the main phase; however, a secondary phase appeared during sintering at 1400°C, as determined by EDS analysis. At 1400°C, the undoped and MgO-doped CSZT had almost similar grain size distribution and densification but the grain size distribution became slightly narrow. The MgO-doped CSZT showed excellent low-loss dielectric properties: εr =34.14, tanδ = 0.00047, τε = 3.58 ppm/°C at 1 MHz.