Microwave dielectric properties of rare-earth ortho-niobates with ferroelasticity

Dong Wan Kim, Do Kyun Kwon, Sung Hun Yoon, Kug Sun Hong

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

In the search for more temperature-stable materials, herein, we report on the microwave dielectric properties and trends of the rare-earth niobate series (RENbO 4), with the main emphasis being placed on LaNbO 4. LaNbO 4 has excellent microwave dielectric properties, especially an anomalous small positive temperature coefficient of resonant frequency of 9 ppm/°C. We present the phase transformation and ferroelastic domain configuration of RENbO 4 studied using in situ X-ray diffraction and high-resolution transmission electron microscopy. The structural distortion caused by the phase transformation is a dominant factor in the relative dielectric constant and temperature coefficient of the resonant frequency in REINbO 4.

Original languageEnglish
Pages (from-to)3861-3864
Number of pages4
JournalJournal of the American Ceramic Society
Volume89
Issue number12
DOIs
Publication statusPublished - 2006 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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