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

doi:10.1143/jjap.41.2978

Effect of structural changes on the microwave dielectric properties of Ba(Zn_1/3Nb_2/3)O₃ ceramics

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

Department of Materials Science and Engineering

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

27 Citations (Scopus)

Abstract

The microstructure and microwave dielectric properties of Ba(Zn_1/3Nb_2/3)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 language	English
Pages (from-to)	2978-2981
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	41
Issue number	5 A
DOIs	https://doi.org/10.1143/jjap.41.2978
Publication status	Published - 2002 May

Keywords

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

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/jjap.41.2978

Cite this

@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 = may,

doi = "10.1143/jjap.41.2978",

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

Y1 - 2002/5

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

U2 - 10.1143/jjap.41.2978

DO - 10.1143/jjap.41.2978

M3 - Article

AN - SCOPUS:0036578201

SN - 0021-4922

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

IS - 5 A

ER -