Ceramics-Silikáty 61, (1) 1 - 5 (2017) |
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PHASE EVOLUTION AND MICROWAVE DIELECTRIC PROPERTIES OF Ca0.61Nd0.26Ti1-x (Al1/2Nb1/2)xO₃ CERAMICS (0 ≤ x ≤ 0.2)
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Chen Hetuo 1,2, Tang Bin 1,2, Fan Peng 2, Wei Meng 2, Zhang Shuren 2
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1 National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Jianshe Road, Chengdu 610054, China
2 State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Jianshe Road, Chengdu 610054, China
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Keywords: Microwave dielectric properties, Substitution, Ca0.61Nd0.26Ti1-x(Al1/2Nb1/2)xO₃
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Phase evolution and microwave dielectric properties of Ca0.61Nd0.26Ti1-x(Al1/2Nb1/2)xO₃ ceramic in the range of 0 ≤ x ≤ 0.2 have been determined in this paper. For 0 ≤ x ≤ 0.1, X-ray diffraction results showed a single perovskite phase. Dielectric constant (ε r) and quality factor (Qxf) kept high values and temperature coefficient of resonant frequency (τf) decreased by 32.4% from 247 ppm/°C to 167 ppm/°C. When 0.15 ≤ x ≤ 0.2, extra peaks with peak positions coincidental with Ca₂Nb₂O₇ phase appeared. Typically, high relative permittivity (≥ 90) and quality factor (≥ 6,400 GHz) could be obtained when sintered at 1400 °C for 2h. |
Record in: Scopus | Web of Science |
 PDF (2.1 MB) |
doi: 10.13168/cs.2016.0052
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