Abstract
The crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 (0 ≤ x ≤ 1) ceramics sintered at 1200 °C for 2 h were investigated. For x < 0.5, solid solution phases with the α-PbO2 structure, typical of ZnTiNb2O8, were obtained, whereas for 0.5 ≤ x < 1, mixtures of two solid solutions each respectively based on the α-PbO 2 structure and a trirutile structure, were obtained. The relative amount of the trirutile-structured phases increased as the Ta content increased in a given region, and the end member ZnTiTa2O8 formed a single phase with the trirutile structure. The microwave dielectric properties were closely related to the crystal structures. A material with a near zero temperature coefficient of resonant frequency could be obtained for x = 0.8, and its dielectric constant and quality factor (Q × f) were 40.5 and 41,000 GHz, respectively.
Original language | English |
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Pages (from-to) | 6908-6912 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 509 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2011 Jun 16 |
Bibliographical note
Funding Information:This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the Knowledge Economy Frontier R&D Program funded by the Ministry of Knowledge Economy (MKE), Republic of Korea .
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
Keywords
- Ceramics
- Crystal structure
- TEM
- X-ray diffraction
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry