Chemical stability and dielectric properties of RO-La 2 O 3 -B 2 O 3 (R = Ca, Mg, Zn)-based ceramics

Yeon Hwa Jo, Min Soo Kang, Kyung Won Chung, Yong Soo Cho

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

New lanthanum borate (La 2 O 3 -B 2 O 3 ) glasses modified with divalent oxides, such as CaO, MgO and ZnO were investigated as potential low temperature dielectrics by understanding compositional dependence of dielectric properties and chemical leaching resistance. Firing behavior, such as densification and crystallization, depended strongly on the glass composition and is found to influence the resultant dielectric performance. Specifically, the dielectric composition of 20ZnO-20La 2 O 3 -60B 2 O 3 glass with 40 wt% Al 2 O 3 as a filler showed distinct enhancements of dielectric properties, i.e., k ∼ 8.3 and Q ∼ 1091 at the resonant frequency of 17.1 GHz, as a result of 850 °C firing. The result was believed related to earlier densification and unexpected evolvements of ZnAl 2 O 4 and La(BO 2 ) 3 phases during firing. The Mg-containing glass sample was most stable in strong acid solutions and did not show any significant changes in microstructure even after 300 min exposure. The Ca-containing glass sample was not regarded as a promising candidate for low temperature dielectrics from the observed low quality factor and weak chemical durability.

Original languageEnglish
Pages (from-to)361-369
Number of pages9
JournalMaterials Research Bulletin
Volume43
Issue number2
DOIs
Publication statusPublished - 2008 Feb 5

Fingerprint

Chemical stability
Dielectric properties
dielectric properties
ceramics
Glass
glass
densification
Densification
Lanthanum
Borates
leaching
Crystallization
borates
Chemical analysis
durability
fillers
lanthanum
Oxides
Leaching
resonant frequencies

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{8155b911b0b44ff29bf3d1aaa239879f,
title = "Chemical stability and dielectric properties of RO-La 2 O 3 -B 2 O 3 (R = Ca, Mg, Zn)-based ceramics",
abstract = "New lanthanum borate (La 2 O 3 -B 2 O 3 ) glasses modified with divalent oxides, such as CaO, MgO and ZnO were investigated as potential low temperature dielectrics by understanding compositional dependence of dielectric properties and chemical leaching resistance. Firing behavior, such as densification and crystallization, depended strongly on the glass composition and is found to influence the resultant dielectric performance. Specifically, the dielectric composition of 20ZnO-20La 2 O 3 -60B 2 O 3 glass with 40 wt{\%} Al 2 O 3 as a filler showed distinct enhancements of dielectric properties, i.e., k ∼ 8.3 and Q ∼ 1091 at the resonant frequency of 17.1 GHz, as a result of 850 °C firing. The result was believed related to earlier densification and unexpected evolvements of ZnAl 2 O 4 and La(BO 2 ) 3 phases during firing. The Mg-containing glass sample was most stable in strong acid solutions and did not show any significant changes in microstructure even after 300 min exposure. The Ca-containing glass sample was not regarded as a promising candidate for low temperature dielectrics from the observed low quality factor and weak chemical durability.",
author = "Jo, {Yeon Hwa} and Kang, {Min Soo} and Chung, {Kyung Won} and Cho, {Yong Soo}",
year = "2008",
month = "2",
day = "5",
doi = "10.1016/j.materresbull.2007.03.002",
language = "English",
volume = "43",
pages = "361--369",
journal = "Materials Research Bulletin",
issn = "0025-5408",
publisher = "Elsevier Limited",
number = "2",

}

Chemical stability and dielectric properties of RO-La 2 O 3 -B 2 O 3 (R = Ca, Mg, Zn)-based ceramics . / Jo, Yeon Hwa; Kang, Min Soo; Chung, Kyung Won; Cho, Yong Soo.

In: Materials Research Bulletin, Vol. 43, No. 2, 05.02.2008, p. 361-369.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chemical stability and dielectric properties of RO-La 2 O 3 -B 2 O 3 (R = Ca, Mg, Zn)-based ceramics

AU - Jo, Yeon Hwa

AU - Kang, Min Soo

AU - Chung, Kyung Won

AU - Cho, Yong Soo

PY - 2008/2/5

Y1 - 2008/2/5

N2 - New lanthanum borate (La 2 O 3 -B 2 O 3 ) glasses modified with divalent oxides, such as CaO, MgO and ZnO were investigated as potential low temperature dielectrics by understanding compositional dependence of dielectric properties and chemical leaching resistance. Firing behavior, such as densification and crystallization, depended strongly on the glass composition and is found to influence the resultant dielectric performance. Specifically, the dielectric composition of 20ZnO-20La 2 O 3 -60B 2 O 3 glass with 40 wt% Al 2 O 3 as a filler showed distinct enhancements of dielectric properties, i.e., k ∼ 8.3 and Q ∼ 1091 at the resonant frequency of 17.1 GHz, as a result of 850 °C firing. The result was believed related to earlier densification and unexpected evolvements of ZnAl 2 O 4 and La(BO 2 ) 3 phases during firing. The Mg-containing glass sample was most stable in strong acid solutions and did not show any significant changes in microstructure even after 300 min exposure. The Ca-containing glass sample was not regarded as a promising candidate for low temperature dielectrics from the observed low quality factor and weak chemical durability.

AB - New lanthanum borate (La 2 O 3 -B 2 O 3 ) glasses modified with divalent oxides, such as CaO, MgO and ZnO were investigated as potential low temperature dielectrics by understanding compositional dependence of dielectric properties and chemical leaching resistance. Firing behavior, such as densification and crystallization, depended strongly on the glass composition and is found to influence the resultant dielectric performance. Specifically, the dielectric composition of 20ZnO-20La 2 O 3 -60B 2 O 3 glass with 40 wt% Al 2 O 3 as a filler showed distinct enhancements of dielectric properties, i.e., k ∼ 8.3 and Q ∼ 1091 at the resonant frequency of 17.1 GHz, as a result of 850 °C firing. The result was believed related to earlier densification and unexpected evolvements of ZnAl 2 O 4 and La(BO 2 ) 3 phases during firing. The Mg-containing glass sample was most stable in strong acid solutions and did not show any significant changes in microstructure even after 300 min exposure. The Ca-containing glass sample was not regarded as a promising candidate for low temperature dielectrics from the observed low quality factor and weak chemical durability.

UR - http://www.scopus.com/inward/record.url?scp=37349124752&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37349124752&partnerID=8YFLogxK

U2 - 10.1016/j.materresbull.2007.03.002

DO - 10.1016/j.materresbull.2007.03.002

M3 - Article

VL - 43

SP - 361

EP - 369

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

IS - 2

ER -