Crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 ceramics

Jeong Hyun Park, Young Jin Choi, Sahn Nahm, Jae Gwan Park

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 languageEnglish
Pages (from-to)6908-6912
Number of pages5
JournalJournal of Alloys and Compounds
Volume509
Issue number24
DOIs
Publication statusPublished - 2011 Jun 16

Keywords

  • Ceramics
  • Crystal structure
  • TEM
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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