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Journal of Materials Science: Materials in Electronics

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01-09-2013

Improved microwave dielectric properties of Mg₄Nb₂O₉ ceramics with CaO–B₂O₃–SiO₂ glass additions

Authors: Haikui Zhu, Wei Shen, Yu Jin, Hongqing Zhou, Xiaodong Shen, Weijuan quan

Published in: Journal of Materials Science: Materials in Electronics | Issue 9/2013

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Abstract

The effects of CaO–B₂O₃–SiO₂ (CBS) glass addition on the sintering temperature and dielectric properties of Mg₄Nb₂O₉ ceramics have been investigated using X-ray diffraction, Scanning electron microscopy and Differential thermal analysis. The CBS glass can change to liquid phase at about 750 °C and a small amount of CBS glass addition to Mg₄Nb₂O₉ ceramics can greatly decrease the sintering temperature to about 1,125 °C. It is revealed that the reduced sintering temperature is attributed to the formation of liquid phase. The major phases of the sample are Mg₄Nb₂O₉ and MgNb₂O₆. The relationship between τ _f values and the content of glass additions have the reverse change trends. The Mg₄Nb₂O₉ ceramics with 2wt% glass addition sintered 1,125 °C exhibit good microwave dielectric properties: dielectric constant (ε _r) of 13 and Q·f value of 69,000 GHz.

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Title: Improved microwave dielectric properties of Mg4Nb2O9 ceramics with CaO–B2O3–SiO2 glass additions
Authors: Haikui Zhu
Wei Shen
Yu Jin
Hongqing Zhou
Xiaodong Shen
Weijuan quan
Publication date: 01-09-2013
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 9/2013
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-013-1283-2

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