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

Do-Hyeok Lee (이도혁); Kyoung-Seok Moon (문경석)

doi:10.6111/JKCGCT.2023.33.6.261

Crystal structure, microstructure, and low-loss dielectric property of MgO-added (Ca,Sr)(Zr,Ti)O₃

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2023, 33(6), pp.261~267
DOI : 10.6111/JKCGCT.2023.33.6.261
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : October 17, 2023
Accepted : November 6, 2023
Published : December 31, 2023

Do-Hyeok Lee ¹, Kyoung-Seok Moon ²

¹경상국립대학교 나노 ·신소재공학부 세라믹공학전공
²경상국립대학교

Accredited

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.

KEYWORDS

(Ca, Sr)(Zr, Ti)O3, Dielectric property, Microstructure, Crystal structure, Low-loss

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