Low-temperature sintering, dielectric performance, and far-IR reflectivity spectrum of a lightweight NaCaVO4 with good chemical compatibility with silver

Xiong, Ying, Xing, Zhuo, Weng, Juhai, Ma, Chi, Khaliq, Jibran and Li, Chunchun (2021) Low-temperature sintering, dielectric performance, and far-IR reflectivity spectrum of a lightweight NaCaVO4 with good chemical compatibility with silver. Ceramics International, 47 (15). pp. 22219-22224. ISSN 0272-8842

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Official URL: https://doi.org/10.1016/j.ceramint.2021.04.096

Abstract

As one of the candidates of low-temperature cofired ceramics (LTCC), the sintering behavior, dielectric properties, and silver chemical compatibility of NaCaVO4 were studied. The bulk ceramic samples were densified well at a low sintering temperature of 720 oC with an optimal bulk density of 2.87 g/cm3. Excellent microwave dielectric properties with a low relative permittivity εr ~ 9.9, a high quality factor Q × f ~ 31,600 GHz, and a temperature coefficient of resonance frequency τf ~ -66.5 ppm/°C were achieved at 11.5 GHz. The far infrared reflectivity spectra revealed the intrinsic dielectric properties (relative permittivity of 8.34 and dielectric loss of 2.7×10-4) are comparable to the measured values. The absence of chemical reaction between NaCaVO4 and silver at firing temperature, evidenced by X-ray diffraction and energy dispersive spectroscopy indicated the potential prospect for LTCC application. Furthermore, the very low density of NaCaVO4 opens up an avenue for its potential applications in light-weight devices.

Item Type: Article
Additional Information: Funding Information: Chunchun Li gratefully acknowledges the financial support from the Natural Science Foundation of China (No. 62061011 ) and the Natural Science Foundation of Guangxi Zhuang Autonomous Region (No. 2018GXNSFAA281253 , 2019GXNSFGA245006 ). The authors would also like to thank the administrators in the IR beamline workstation of the National Synchrotron Radiation Laboratory (NSRL) for their help in the IR measurement.
Uncontrolled Keywords: Microwave band, Dielectric properties, Sintering behavior, Ceramics, Low-density materials
Subjects: H100 General Engineering
H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 19 Apr 2021 09:44
Last Modified: 11 Aug 2021 10:45
URI: http://nrl.northumbria.ac.uk/id/eprint/45935

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