Low temperature sintering of BaO-Sm2O3-4TiO2 ceramics

Kyung Hoon Cho; Jong Bong Lim; Sahn Nahm; Hyo Tae Kim; Jong Hee Kim; Jong Hoo Paik; Hwack Joo Lee

doi:10.1016/j.jeurceramsoc.2006.05.061

Low temperature sintering of BaO-Sm₂O₃-4TiO₂ ceramics

Kyung Hoon Cho, Jong Bong Lim, Sahn Nahm, Hyo Tae Kim, Jong Hee Kim, Jong Hoo Paik, Hwack Joo Lee

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

12 Citations (Scopus)

Abstract

The effect of B₂O₃ and CuO on the sintering temperature and microwave dielectric properties of BaSm₂Ti₄O₁₂ ceramics was investigated. The BaSm₂Ti₄O₁₂ ceramics were able to be sintered at 1000 °C when B₂O₃ was added. This decrease in the sintering temperature of the BaSm₂Ti₄O₁₂ ceramics upon the addition of B₂O₃ is attributed to the BaB₄O₇ second phase, whose melting temperature is around 900 °C. The B₂O₃ added BaSm₂Ti₄O₁₂ ceramics alone were not able to be sintered below 1000 °C, but were sintered at 875 °C when CuO was added. BaCu(B₂O₅) second phase might be responsible for the decrease in the sintering temperature of the CuO and B₂O₃ added BaSm₂Ti₄O₁₂ ceramics. The BaSm₂Ti₄O₁₂ + 10.0 mol% B₂O₃ + 20.0 mol% CuO ceramics sintered at 875 °C for 2 h have good microwave dielectric properties of ε_r = 61.47, Q × f = 4256 GHz and τ_f = -9.25 ppm/°C. The BaCu(B₂O₅) is also a good additive for decreasing the sintering temperature of the BaSm₂Ti₄O₁₂ ceramics.

Original language	English
Pages (from-to)	1053-1058
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	27
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2006.05.061
Publication status	Published - 2007

Bibliographical note

Funding Information:
This work was supported by the Ministry of Commerce, Industry and Energy and one of the authors also acknowledges the financial support provided by the Ministry of Science and Technology through the NRL Project.

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

Keywords

Dielectric properties
Microstructure
Sintering

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2006.05.061

Cite this

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title = "Low temperature sintering of BaO-Sm2O3-4TiO2 ceramics",

abstract = "The effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of BaSm2Ti4O12 ceramics was investigated. The BaSm2Ti4O12 ceramics were able to be sintered at 1000 °C when B2O3 was added. This decrease in the sintering temperature of the BaSm2Ti4O12 ceramics upon the addition of B2O3 is attributed to the BaB4O7 second phase, whose melting temperature is around 900 °C. The B2O3 added BaSm2Ti4O12 ceramics alone were not able to be sintered below 1000 °C, but were sintered at 875 °C when CuO was added. BaCu(B2O5) second phase might be responsible for the decrease in the sintering temperature of the CuO and B2O3 added BaSm2Ti4O12 ceramics. The BaSm2Ti4O12 + 10.0 mol% B2O3 + 20.0 mol% CuO ceramics sintered at 875 °C for 2 h have good microwave dielectric properties of εr = 61.47, Q × f = 4256 GHz and τf = -9.25 ppm/°C. The BaCu(B2O5) is also a good additive for decreasing the sintering temperature of the BaSm2Ti4O12 ceramics.",

keywords = "Dielectric properties, Microstructure, Sintering",

author = "Cho, {Kyung Hoon} and Lim, {Jong Bong} and Sahn Nahm and Kim, {Hyo Tae} and Kim, {Jong Hee} and Paik, {Jong Hoo} and Lee, {Hwack Joo}",

note = "Funding Information: This work was supported by the Ministry of Commerce, Industry and Energy and one of the authors also acknowledges the financial support provided by the Ministry of Science and Technology through the NRL Project. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2007",

doi = "10.1016/j.jeurceramsoc.2006.05.061",

language = "English",

volume = "27",

pages = "1053--1058",

journal = "Journal of the European Ceramic Society",

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AU - Cho, Kyung Hoon

AU - Lim, Jong Bong

AU - Nahm, Sahn

AU - Kim, Hyo Tae

AU - Kim, Jong Hee

AU - Paik, Jong Hoo

AU - Lee, Hwack Joo

N1 - Funding Information: This work was supported by the Ministry of Commerce, Industry and Energy and one of the authors also acknowledges the financial support provided by the Ministry of Science and Technology through the NRL Project. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2007

Y1 - 2007

N2 - The effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of BaSm2Ti4O12 ceramics was investigated. The BaSm2Ti4O12 ceramics were able to be sintered at 1000 °C when B2O3 was added. This decrease in the sintering temperature of the BaSm2Ti4O12 ceramics upon the addition of B2O3 is attributed to the BaB4O7 second phase, whose melting temperature is around 900 °C. The B2O3 added BaSm2Ti4O12 ceramics alone were not able to be sintered below 1000 °C, but were sintered at 875 °C when CuO was added. BaCu(B2O5) second phase might be responsible for the decrease in the sintering temperature of the CuO and B2O3 added BaSm2Ti4O12 ceramics. The BaSm2Ti4O12 + 10.0 mol% B2O3 + 20.0 mol% CuO ceramics sintered at 875 °C for 2 h have good microwave dielectric properties of εr = 61.47, Q × f = 4256 GHz and τf = -9.25 ppm/°C. The BaCu(B2O5) is also a good additive for decreasing the sintering temperature of the BaSm2Ti4O12 ceramics.

AB - The effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of BaSm2Ti4O12 ceramics was investigated. The BaSm2Ti4O12 ceramics were able to be sintered at 1000 °C when B2O3 was added. This decrease in the sintering temperature of the BaSm2Ti4O12 ceramics upon the addition of B2O3 is attributed to the BaB4O7 second phase, whose melting temperature is around 900 °C. The B2O3 added BaSm2Ti4O12 ceramics alone were not able to be sintered below 1000 °C, but were sintered at 875 °C when CuO was added. BaCu(B2O5) second phase might be responsible for the decrease in the sintering temperature of the CuO and B2O3 added BaSm2Ti4O12 ceramics. The BaSm2Ti4O12 + 10.0 mol% B2O3 + 20.0 mol% CuO ceramics sintered at 875 °C for 2 h have good microwave dielectric properties of εr = 61.47, Q × f = 4256 GHz and τf = -9.25 ppm/°C. The BaCu(B2O5) is also a good additive for decreasing the sintering temperature of the BaSm2Ti4O12 ceramics.

KW - Dielectric properties

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