Phase relation and dielectric properties of Bi 2O 3-ZnO-Nb 2O 5-based ceramics

Jeong Seog Kim, Chae Il Cheon, Sahn Nahm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

The crystal structure and dielectric properties of pyrochlore (a=10.5 ) Bi 1.65 (Zn 2/3 Nb 4/3 )O 6.5 ceramics and a new compositional ceramic Bi(Zn 2/3 Nb 1/3 )O 3 having disordered-fluorite type structure have been studied. The samples are prepared in the sintering temperature range 850~1100C depending on the substitution atoms. The pyrochlore structure is Fd-3m(a=10.5 ) and the new disordered fluorite type structure can be described by Fm-3m or F-43m(a=5.45 ). By the Nd, La, and Y substitutions in the pyrochlore phase, the temperature coefficient of dielectric permittivity τ εcan be stabilized to near zero value. Loss tan δ and εr change in the range of 0.0001~0.0025 and 67~87 respectively.

Original languageEnglish
Title of host publicationFerroelectrics
Pages273-278
Number of pages6
Volume272
DOIs
Publication statusPublished - 2002 Jan 1

Keywords

  • A new disordered-fluorite type
  • Bi(Zn Nb )O
  • Crystal structure
  • Dielectric properties
  • Pyrochlore

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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