Preparation and microwave dielectric properties of new low-loss NiZrTa^sub 2^O^sub 8^ ceramics

New low-loss NiZrTa2O8 ceramics were prepared by conventional mixed-oxide method with the crystal structure and microwave dielectric properties being investigated. The phase composition of NiZrTa2O8 ceramics presented two-phase coexistence, indexed as NiTiNb2O8 and Ni0.5Ti0.5NbO4. The apparent morph...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-03, Vol.778, p.576
Main Authors: Wang, Ying, Tang, Tian-Liang, Zhang, Jun-Ting, Xia, Wang-Suo, Shi, Li-Wei
Format: Article
Language:English
Subjects:
Ceramics
Crystal structure
Dielectric properties
Grain size
Morphology
Phase composition
Q factors
Online Access:Get full text
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Summary:New low-loss NiZrTa2O8 ceramics were prepared by conventional mixed-oxide method with the crystal structure and microwave dielectric properties being investigated. The phase composition of NiZrTa2O8 ceramics presented two-phase coexistence, indexed as NiTiNb2O8 and Ni0.5Ti0.5NbO4. The apparent morphology and grain size were analyzed as a function of sintering temperature. The dielectric constant (εr) which changed from 19.02 to 21.38, was mainly dependent on the densities and phase composition. The quality factor (Q ×  ) was dominated by grain size. In this paper, the optimum performance of NiZrTa2O8 ceramics were εr = 20.61, Q ×   = 49200 GHz, sintered at 1325 °C.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.11.132