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
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마이크로파 유전체 적용을 위해 (Ca, Sr)(Zr, Ti)O3 (CSZT) 계에서 MgO 첨가에 따른 결정 구조, 미세 구조, 및 유전 특성을 연구하였다. 고상 반응법을 통해 합성된 CSZT 분말은 orthorhombic 단일상을 형성하였다. CSZT의 시편을 각각 1200°C, 1300°C 및 1400°C에서 소결하였고, 소결 후 모든 시편은 orthorhombic 단일상을 확인하였다. 또한 모든 소결 시편은 온도가 증가함에 따라 입자 크기가 증가하였다. 1 mol% MgO를 첨가한 시편의 경우도 소결 이후에 orthorhombic 구조를 갖는 것을 확인하였다. EDS 분석을 통해 1400°C에서 소결 중에 이차상이 형성된 것을 확인하였다. MgO 첨가된 CSZT의 입자크기분포와 치밀화는 첨가하지 않은 경우와 거의 유사했으나, 입자크기분포가 좁아지며 균일해지는 것을 확인하였다. MgO 첨가된 CSZT는 1kHz에서 εr =34.14, tanδ = 0.00047, τε = 3.58 ppm/°C로 우수한 저손실 유전 특성을 가졌다.
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.
참고문헌 (37)
- S. Nomura, "Ceramics for microwave dielectric resonator", Ferroelectrics, 49, pp.61~ (1983)
- T. Negas, "BaTi4O9", Ba2Ti9O20-based ceramics resurrected for modern microwave applications, 1993, pp.72, 80~
- C.-L. Huang, "Effect of V2O5 and CuO additives on sintering behavior and microwave dielectric properties of BiNbO4 ceramics", J. Mater. Sci, 35, pp.5443~ (2000)
- C.-L. Huang, "Liquid phase sintering of MgTiO3-CaTiO3 microwave dielectric ceramics", Mater. Chem. Phys, 78, pp.111~ (2003)
- X. Chen, "Microstructures and microwave dielectric characteristics of Ca(Zn1", 3Nb2, J. Am. Ceram. Soc, pp.2004, 87[DOI]
- M.-H. Kim, "Effect of B2O3 and CuO additives on the sintering temperature and microwave dielectric properties of Ba(Zn1", 3Nb2, J. Eur. Ceram. Soc, pp.2006, 26[DOI]
- S. George, "Synthesis and microwave dielectric properties of novel temperature stable high Q, Li2ATi3O8(A=Mg, Zn)ceramics", J. Am. Ceram. Soc, 93, pp.2164~ (2010)
- S. Bindra Narang, "Low loss dielectric ceramics for microwave applications: a review", Journal of Ceramic Processing Research, 11(3), pp.316~321 (2010), 청정에너지연구소[DOI]
- R. Bhuyan, "Liquid phase effect of Bi2O3 additive on densification, microstructure and microwave dielectric properties of Mg2TiO4 ceramics", Ferroelectrics, 516, pp.173~ (2017)
- J. Guo, "Cold sintering process : a new era for ceramic packaging and microwave device development", J. Am. Ceram. Soc, 100, pp.669~ (2017)
- D. Zhou, "High permittivity and low loss microwave dielectrics suitable for 5G resonators and low temperature co-fired ceramic architecture", J. Mater. Chem. C, 5, pp.10094~ (2017)
- M. Pollet, "CaZrO3, a Nico-sinterable dielectric material for base metal-multilayer ceramic capacitor applications", J. Eur. Ceram. Soc, 24, pp.119~ (2004)
- H. Shin, "Sintering and dielectric properties of Li2O-B2O3-Al2O3-SiO2 glass-added(Ca0. 7Sr0. 3O)1. 03(Ti0. 1Zr0. 9)O2 for copper electrode", Int. J. Appl. Ceram. Technol, 10, pp.716~ (2013)
- S. K. Thatikonda, "Effects of CeO2 nanoparticles and annealing temperature on the microwave dielectric properties of MgTiO3 ceramics", Ceram. Int, 40, pp.1125~ (2014)
- Yu-De Li, "Dielectric properties and microstructures of (CaxSr1-x) ZrO3 ceramics", Journal of Ceramic Processing Research, 19(6), pp.461~466 (2018), 청정에너지연구소[DOI]
- D. Wang, "Cold-sintered C0G multilayer ceramic capacitors", Adv. Electronic Mater, 5, pp.1900025~ (2019)
- H. Ohsato, "Volume crystallization and microwave dielectric properties of indialite", cordierite glass by TiO2 addition, 2021, pp.47, 2735~
- W. L ou, "Low permittivity cordierite-based microwave dielectric ceramics for 5G", 6G telecommunications, 2022, pp.42, 2820~
- Z. Tan, "The effects of TiO2 addition on microwave dielectric properties of Y3MgAl3SiO12 ceramic for 5G application", Ceram. Int, 46, pp.15665~ (2020)
- J. Plourde, "Ba2Ti9O20 as a microwave dielectric resonator", J. Am. Ceram. Soc, 58, pp.418~ (1975)
- D. Zhou, "High quality factor, ultralow sintering temperature Li6B4O9 microwave dielectric ceramics with ultralow density for antenna substrates", ACSS ust. Chem. Eng, 6, pp.11138~ (2018)
- Z. -Y. Zou, "Novel high Curie temperature Ba2ZnSi2O7 ferroelectrics with low-permittivity microwave dielectric properties", Ceram. Int, 42, pp.16387~ (2016)
- H. Zheng, "Raman spectroscopy of B-site order-disorder in CaTiO3-based microwave ceramics", J. Eur. Ceram. Soc, 23, pp.2653~ (2003)
- M. -H. Kim, "Low temperature sintering of BaCu(B2O5)-added BaO-Re2O3-TiO2(Re=Sm, Nd)ceramics", J. Eu. r Ceram. Soc, 27, pp.3033~ (2007)
- S. Nomura, "Ba (Mg1", 3Ta2, Jpn. J. Appl. Phys, pp.1982, 21[DOI]
- H. J. Jo, "Microwave dielectric properties of MgTiO3-based ceramics", Ceram. Int, 41, pp.S530~ (2015)
- M. Z. Jhou, "Low-fire processing of microwave BaTi4O9 dielectric with BaO-ZnO-B2O3glass", J. Am. Ceram. Soc, 89, pp.786~ (2006)
- T. Takada, "Effects of glass additions on(Zr, Sn)TiO4for microwave applications", J. Am. Ceram. Soc, 77, pp.2485~ (1994)
- D. F. Hennings, "Dielectric materials for sintering in reducing atmospheres", J. Eur. Ceram. Soc, 21, pp.1637~ (2001)
- W. -J. Lee, "Decreasing of CaZrO3 sintering temperature with glass frit addition", Ceram. Int, 31, pp.521~ (2005)
- M. Pollet, "High decrease in CaZrO3s intering temperature using complex fluoride fluxes", J. Eur. Ceram. Soc, 25, pp.2773~ (2005)
- C. Prasanth, "Synthesis, characterization and microwave dielectric properties of nanocrystalline CaZrO3 ceramics", J. Alloys Compd, 464, pp.306~ (2008)
- H. Lee, "High-energy density dielectrics and capacitors for elevated temperatures : Ca(Zr, Ti)O3", J. Am. Ceram. Soc, 96, pp.1209~ (2013)
- T. Yamaguchi, "Newly developed ternary(Ca, Sr, Ba)zirconate ceramic system for microwave resonators", Ferroelectrics, 27, pp.273~ (1980)
- M. D. Hill, "Perspective on ceramic materials for 5G wireless communication systems", Appl. Phys. Lett, 118 (2021)
- S. -J. L. Kang, "Microstructural evolution during sintering with control of the interface structure", J. Am. Ceram. Soc, 92, pp.1464~ (2009)
- 최우진, "La2O3 첨가에 따른 BaTiO3의 미세구조 및 유전특성", 한국결정성장학회지, 30(3), pp.103~109 (2020), 한국결정성장학회[DOI]