Phase relation and dielectric properties of Bi2O 3-ZnO-Nb2O5-based ceramics

Jeong Seog Kim; Chae Il Cheon; Sahn Nahm

doi:10.1080/713716278

Phase relation and dielectric properties of Bi₂O ₃-ZnO-Nb₂O₅-based ceramics

Jeong Seog Kim, Chae Il Cheon, Sahn Nahm

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	273-278
Number of pages	6
Journal	Ferroelectrics
Volume	272
DOIs	https://doi.org/10.1080/713716278
Publication status	Published - 2002 Jan 1

Keywords

A new disordered-fluorite type
Bi(ZnNb)O
Crystal structure
Dielectric properties
Pyrochlore

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/713716278

Cite this

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title = "Phase relation and dielectric properties of Bi2O 3-ZnO-Nb2O5-based ceramics",

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.",

keywords = "A new disordered-fluorite type, Bi(ZnNb)O, Crystal structure, Dielectric properties, Pyrochlore",

author = "Kim, {Jeong Seog} and Cheon, {Chae Il} and Sahn Nahm",

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AU - Cheon, Chae Il

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N2 - 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.

AB - 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.

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