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Sintering behaviour and microwave dielectric properties of a new complex perovskite: (1 − x)(Sr0.3Ca0.427Nd0.182)TiO3−x SmAlO3 ceramics

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Abstract

Structural features and microwave dielectric properties of (1−x)(Sr0.3Ca0.427Nd0.182)TiO3−x SmAlO3 (0.05≤x≤ 0.4) ceramics were investigated. X-ray diffraction patterns illustrated that solid solutions with the orthorhombic perovskite were shown to be formed in the ranges of 0.05≤x≤ 0.4. Moreover, the dielectric constant (ε r ) of sintered ceramics had a quasi-linear decrease with the increase in SmAlO 3 content. A certain amount of Sm and Al substitution for A- and B-sites could substantially improve the quality factor (Qf) of the ceramics. Increasing the oxygen octahedral distortion led to a decrease in the temperature coefficient of the resonant frequency (τ f) from 216.3 to −34.8 ppm°C−1. Additionally, optimized microwave dielectric properties can be achieved for the specimens using 0.75(Sr0.3Ca0.427Nd0.182)TiO3–0.25SmAlO3 ceramics [ε r ∼ 58.3, Qf ∼18800 GHz (at 4.65 GHz) and τ f∼ 2.3 ppm°C−1] after being sintered at 1500°C for 4 h.

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Acknowledgement

Financial supports of the National Natural Science Foundation of China (Grant no. 11464006) and the Middle-aged and Young Teachers of the College and/or University for Basic Ability Promotion Project in Guangxi of China (Grants No. KY2016YB534) are gratefully acknowledged by the authors.

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Authors and Affiliations

  1. Department of Information Engineering, Guilin University of Aerospace Technology, Guilin, 541004, PR China

    JING JING QU & XING WEI

  2. School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China

    FEI LIU

  3. College of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China

    CHANG LAI YUAN & XIAN PEI HUANG

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  1. JING JING QU
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  2. FEI LIU
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Correspondence to FEI LIU.

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QU, J.J., LIU, F., WEI, X. et al. Sintering behaviour and microwave dielectric properties of a new complex perovskite: (1 − x)(Sr0.3Ca0.427Nd0.182)TiO3−x SmAlO3 ceramics. Bull Mater Sci 39, 1645–1649 (2016). https://doi.org/10.1007/s12034-016-1333-5

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