Phase transformation and microwave dielectric properties of BiPO 4 ceramics

In Sun Cho, Jeong Ryeol Kim, Dong-Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Monazite-type compounds, BiPO4 polymorphs were prepared by the solid-state reaction method. The phase transformation and microwave dielectric properties of sintered ceramics were investigated using the X-ray powder diffraction (XRD) and a network analyzer, respectively. The low-temperature phase of BiPO4 has monoclinic structure, and was transformed into the high-temperature phase with a slight distortion of monoclinic when it is heated above 600°C. The effect of the transformation on the microwave dielectric properties was examined. It was found that the dielectric properties of each phase were significantly different. In particular, the high-temperature phase sintered at 950°C has good microwave dielectric properties; the relative dielectric constant (ε r ) = 22, the quality factor (Q× f) = 32,500 GHz and the temperature coefficient of resonant frequency (τ f ) = - 79 ppm/ °C.

Original languageEnglish
Pages (from-to)379-383
Number of pages5
JournalJournal of Electroceramics
Volume16
Issue number4
DOIs
Publication statusPublished - 2006 Jul 1
Externally publishedYes

Fingerprint

Dielectric properties
phase transformations
dielectric properties
Phase transitions
Microwaves
ceramics
microwaves
Monazite
Temperature
Electric network analyzers
Polymorphism
Solid state reactions
X ray powder diffraction
resonant frequencies
Q factors
Natural frequencies
analyzers
Permittivity
permittivity
solid state

Keywords

  • Bismuth phosphate
  • Microwave dielectric properties
  • Phase transformation
  • Polymorphs

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Phase transformation and microwave dielectric properties of BiPO 4 ceramics. / Cho, In Sun; Kim, Jeong Ryeol; Kim, Dong-Wan; Hong, Kug Sun.

In: Journal of Electroceramics, Vol. 16, No. 4, 01.07.2006, p. 379-383.

Research output: Contribution to journalArticle

Cho, In Sun ; Kim, Jeong Ryeol ; Kim, Dong-Wan ; Hong, Kug Sun. / Phase transformation and microwave dielectric properties of BiPO 4 ceramics. In: Journal of Electroceramics. 2006 ; Vol. 16, No. 4. pp. 379-383.
@article{8d03ed186fd442b2b66d00dc8070847b,
title = "Phase transformation and microwave dielectric properties of BiPO 4 ceramics",
abstract = "Monazite-type compounds, BiPO4 polymorphs were prepared by the solid-state reaction method. The phase transformation and microwave dielectric properties of sintered ceramics were investigated using the X-ray powder diffraction (XRD) and a network analyzer, respectively. The low-temperature phase of BiPO4 has monoclinic structure, and was transformed into the high-temperature phase with a slight distortion of monoclinic when it is heated above 600°C. The effect of the transformation on the microwave dielectric properties was examined. It was found that the dielectric properties of each phase were significantly different. In particular, the high-temperature phase sintered at 950°C has good microwave dielectric properties; the relative dielectric constant (ε r ) = 22, the quality factor (Q× f) = 32,500 GHz and the temperature coefficient of resonant frequency (τ f ) = - 79 ppm/ °C.",
keywords = "Bismuth phosphate, Microwave dielectric properties, Phase transformation, Polymorphs",
author = "Cho, {In Sun} and Kim, {Jeong Ryeol} and Dong-Wan Kim and Hong, {Kug Sun}",
year = "2006",
month = "7",
day = "1",
doi = "10.1007/s10832-006-9883-3",
language = "English",
volume = "16",
pages = "379--383",
journal = "Journal of Electroceramics",
issn = "1385-3449",
publisher = "Springer Netherlands",
number = "4",

}

TY - JOUR

T1 - Phase transformation and microwave dielectric properties of BiPO 4 ceramics

AU - Cho, In Sun

AU - Kim, Jeong Ryeol

AU - Kim, Dong-Wan

AU - Hong, Kug Sun

PY - 2006/7/1

Y1 - 2006/7/1

N2 - Monazite-type compounds, BiPO4 polymorphs were prepared by the solid-state reaction method. The phase transformation and microwave dielectric properties of sintered ceramics were investigated using the X-ray powder diffraction (XRD) and a network analyzer, respectively. The low-temperature phase of BiPO4 has monoclinic structure, and was transformed into the high-temperature phase with a slight distortion of monoclinic when it is heated above 600°C. The effect of the transformation on the microwave dielectric properties was examined. It was found that the dielectric properties of each phase were significantly different. In particular, the high-temperature phase sintered at 950°C has good microwave dielectric properties; the relative dielectric constant (ε r ) = 22, the quality factor (Q× f) = 32,500 GHz and the temperature coefficient of resonant frequency (τ f ) = - 79 ppm/ °C.

AB - Monazite-type compounds, BiPO4 polymorphs were prepared by the solid-state reaction method. The phase transformation and microwave dielectric properties of sintered ceramics were investigated using the X-ray powder diffraction (XRD) and a network analyzer, respectively. The low-temperature phase of BiPO4 has monoclinic structure, and was transformed into the high-temperature phase with a slight distortion of monoclinic when it is heated above 600°C. The effect of the transformation on the microwave dielectric properties was examined. It was found that the dielectric properties of each phase were significantly different. In particular, the high-temperature phase sintered at 950°C has good microwave dielectric properties; the relative dielectric constant (ε r ) = 22, the quality factor (Q× f) = 32,500 GHz and the temperature coefficient of resonant frequency (τ f ) = - 79 ppm/ °C.

KW - Bismuth phosphate

KW - Microwave dielectric properties

KW - Phase transformation

KW - Polymorphs

UR - http://www.scopus.com/inward/record.url?scp=33750567816&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750567816&partnerID=8YFLogxK

U2 - 10.1007/s10832-006-9883-3

DO - 10.1007/s10832-006-9883-3

M3 - Article

AN - SCOPUS:33750567816

VL - 16

SP - 379

EP - 383

JO - Journal of Electroceramics

JF - Journal of Electroceramics

SN - 1385-3449

IS - 4

ER -