Barium/lead-rich high permittivity glass-ceramics for capacitor applications

Badri Rangarajan, Beth Jones, Tom Shrout, Michael Lanagan

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

Dielectric properties of glass-ceramics containing barium/lead-based sodium niobates and barium titanate-based silicates were evaluated for capacitor applications. The glasses were formed by melt-rolling the respective constituents which were then crystallized by reheating them at higher temperatures. Crystallization schedules were formulated based on differential thermal analysis results. X-ray diffractometer patterns indicated that the samples were highly crystallized. Microstructure and microchemistry of samples were studied by transmission electron micropscopy. Perovskite, tungsten-bronze and fresnoite phases developed during crystallization have a strong effect on the resulted dielectric properties with permittivities ranging from 20 to 700. Resistivity measurements were done to study conduction mechanisms in samples and the resistivity values for glass-ceramics were found to be between 10 11 and 1013 Ω · cm at 150°C. MnO 2 additions were made to improve the electrical resistivity of glass-ceramics.

Original languageEnglish (US)
Pages (from-to)784-788
Number of pages5
JournalJournal of the American Ceramic Society
Volume90
Issue number3
DOIs
StatePublished - Mar 1 2007

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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