Effect of structural changes on the microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics

Si Yoon Noh, Myong Jae Yoo, Sahn Nahm, Chang Hak Choi, Hyun Min Park, Hwack Joo Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 (BZN) ceramics have been investigated. BZN has a 1 : 2 ordered hexagonal structure, and the degree of 1 : 2 ordering decreased with increasing sintering temperature. Liquid phase was found for the BZN sintered at more than 1350°C, the evaporation of ZnO was responsible for the formation of liquid phase. BaNb6O16 second phase was also found for the specimens sintered at more than 1350°C and the liquid phase is considered to have a composition close to that of BaNb6O16 second phase. The Q-value of BZN was increased with increasing sintering temperature and BZN sintered at 1400°C for 6 h has the maximum Q-value. Since the 1 : 2 ordering decreased with the sintering temperature, the enhancement of Q-value is not related to the 1 : 2 ordering. The increase of the average grain size could be responsible for the increase of the Q-value, and the relative density also influenced the Q-value. BZN ceramics were sintered for various times at 1400°C and 1300°C and the variation of Q-value was explained in terms of the grain size and the relative density.

Original languageEnglish
Pages (from-to)2978-2981
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number5 A
Publication statusPublished - 2002 May 1

Fingerprint

Dielectric properties
dielectric properties
Sintering
Microwaves
ceramics
microwaves
Liquids
sintering
liquid phases
Temperature
Evaporation
grain size
Microstructure
Chemical analysis
temperature
evaporation
microstructure
augmentation

Keywords

  • 1 : 2 ordering
  • Ba(ZnNb)O ceramics
  • Microstructure
  • Microwave dielectric properties

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Effect of structural changes on the microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics. / Noh, Si Yoon; Yoo, Myong Jae; Nahm, Sahn; Choi, Chang Hak; Park, Hyun Min; Lee, Hwack Joo.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 41, No. 5 A, 01.05.2002, p. 2978-2981.

Research output: Contribution to journalArticle

@article{9f21ed15d67e42f48619a37a398d4222,
title = "Effect of structural changes on the microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics",
abstract = "The microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 (BZN) ceramics have been investigated. BZN has a 1 : 2 ordered hexagonal structure, and the degree of 1 : 2 ordering decreased with increasing sintering temperature. Liquid phase was found for the BZN sintered at more than 1350°C, the evaporation of ZnO was responsible for the formation of liquid phase. BaNb6O16 second phase was also found for the specimens sintered at more than 1350°C and the liquid phase is considered to have a composition close to that of BaNb6O16 second phase. The Q-value of BZN was increased with increasing sintering temperature and BZN sintered at 1400°C for 6 h has the maximum Q-value. Since the 1 : 2 ordering decreased with the sintering temperature, the enhancement of Q-value is not related to the 1 : 2 ordering. The increase of the average grain size could be responsible for the increase of the Q-value, and the relative density also influenced the Q-value. BZN ceramics were sintered for various times at 1400°C and 1300°C and the variation of Q-value was explained in terms of the grain size and the relative density.",
keywords = "1 : 2 ordering, Ba(ZnNb)O ceramics, Microstructure, Microwave dielectric properties",
author = "Noh, {Si Yoon} and Yoo, {Myong Jae} and Sahn Nahm and Choi, {Chang Hak} and Park, {Hyun Min} and Lee, {Hwack Joo}",
year = "2002",
month = "5",
day = "1",
language = "English",
volume = "41",
pages = "2978--2981",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Japan Society of Applied Physics",
number = "5 A",

}

TY - JOUR

T1 - Effect of structural changes on the microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics

AU - Noh, Si Yoon

AU - Yoo, Myong Jae

AU - Nahm, Sahn

AU - Choi, Chang Hak

AU - Park, Hyun Min

AU - Lee, Hwack Joo

PY - 2002/5/1

Y1 - 2002/5/1

N2 - The microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 (BZN) ceramics have been investigated. BZN has a 1 : 2 ordered hexagonal structure, and the degree of 1 : 2 ordering decreased with increasing sintering temperature. Liquid phase was found for the BZN sintered at more than 1350°C, the evaporation of ZnO was responsible for the formation of liquid phase. BaNb6O16 second phase was also found for the specimens sintered at more than 1350°C and the liquid phase is considered to have a composition close to that of BaNb6O16 second phase. The Q-value of BZN was increased with increasing sintering temperature and BZN sintered at 1400°C for 6 h has the maximum Q-value. Since the 1 : 2 ordering decreased with the sintering temperature, the enhancement of Q-value is not related to the 1 : 2 ordering. The increase of the average grain size could be responsible for the increase of the Q-value, and the relative density also influenced the Q-value. BZN ceramics were sintered for various times at 1400°C and 1300°C and the variation of Q-value was explained in terms of the grain size and the relative density.

AB - The microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 (BZN) ceramics have been investigated. BZN has a 1 : 2 ordered hexagonal structure, and the degree of 1 : 2 ordering decreased with increasing sintering temperature. Liquid phase was found for the BZN sintered at more than 1350°C, the evaporation of ZnO was responsible for the formation of liquid phase. BaNb6O16 second phase was also found for the specimens sintered at more than 1350°C and the liquid phase is considered to have a composition close to that of BaNb6O16 second phase. The Q-value of BZN was increased with increasing sintering temperature and BZN sintered at 1400°C for 6 h has the maximum Q-value. Since the 1 : 2 ordering decreased with the sintering temperature, the enhancement of Q-value is not related to the 1 : 2 ordering. The increase of the average grain size could be responsible for the increase of the Q-value, and the relative density also influenced the Q-value. BZN ceramics were sintered for various times at 1400°C and 1300°C and the variation of Q-value was explained in terms of the grain size and the relative density.

KW - 1 : 2 ordering

KW - Ba(ZnNb)O ceramics

KW - Microstructure

KW - Microwave dielectric properties

UR - http://www.scopus.com/inward/record.url?scp=0036578201&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036578201&partnerID=8YFLogxK

M3 - Article

VL - 41

SP - 2978

EP - 2981

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 5 A

ER -