Effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of Ba(Zn1/3Ta 2/3)O3 ceramics

Min Han Kim; Sahn Nahm; Woo Sung Lee; Myong Jae Yoo; Nam Kee Kang; Hyo Tae Kim; Hwack Joo Lee

doi:10.1143/JJAP.44.3091

Effect of B₂O₃ and CuO on the sintering temperature and microwave dielectric properties of Ba(Zn_1/3Ta _2/3)O₃ ceramics

Min Han Kim, Sahn Nahm, Woo Sung Lee, Myong Jae Yoo, Nam Kee Kang, Hyo Tae Kim, Hwack Joo Lee

Department of Materials Science and Engineering

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

37 Citations (Scopus)

Abstract

Sintering temperature of the Ba(Zn_1/3Ta_2/3)O ₃ (BZT) ceramic is about 1550°C and it decreased to 950°C when B₂O₃ was added. The BaB₄O₇ second phase whose melting temperature is 889°C was found in the B ₂O₃ added BZT ceramics. The BaB₄O₇ second phase assisted the sintering of the BZT ceramics at 950°C. However, the B₂O₃ added BZT ceramic was not sintered below 950°C and the microwave dielecric properties were not satisfactory. On the other hand, when the B₂O₃ and the CuO were added, the BZT ceramic was sintered even at 870°C. The BaCu(B₂O₅) phase which was found in the CuO and B₂O₃ added BZT ceramics, existed as the liquid phase during the sintering and helped the densification of the BZT ceramics at temperatures lower than 950°C. Good microwave dielectric properties of Q × f = 11,000 GHz, ε _r, = 26 and τ_f = 0.0 ppm/°C were obtained from the BZT + 5.0 mol% B₂O₃ + 10.0 mol% CuO ceramic sintered at 870°C for 2h.

Original language	English
Pages (from-to)	3091-3094
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	44
Issue number	5 A
DOIs	https://doi.org/10.1143/JJAP.44.3091
Publication status	Published - 2005 May

Keywords

Ba(ZnTa)O
BaCu(bO)
LTCC
Microwave dielectric properties

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.44.3091

Cite this

Effect of B₂O₃ and CuO on the sintering temperature and microwave dielectric properties of Ba(Zn_1/3Ta _2/3)O₃ ceramics. / Kim, Min Han; Nahm, Sahn; Lee, Woo Sung et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 44, No. 5 A, 05.2005, p. 3091-3094.

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

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title = "Effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of Ba(Zn1/3Ta 2/3)O3 ceramics",

abstract = "Sintering temperature of the Ba(Zn1/3Ta2/3)O 3 (BZT) ceramic is about 1550°C and it decreased to 950°C when B2O3 was added. The BaB4O7 second phase whose melting temperature is 889°C was found in the B 2O3 added BZT ceramics. The BaB4O7 second phase assisted the sintering of the BZT ceramics at 950°C. However, the B2O3 added BZT ceramic was not sintered below 950°C and the microwave dielecric properties were not satisfactory. On the other hand, when the B2O3 and the CuO were added, the BZT ceramic was sintered even at 870°C. The BaCu(B2O5) phase which was found in the CuO and B2O3 added BZT ceramics, existed as the liquid phase during the sintering and helped the densification of the BZT ceramics at temperatures lower than 950°C. Good microwave dielectric properties of Q × f = 11,000 GHz, ε r, = 26 and τf = 0.0 ppm/°C were obtained from the BZT + 5.0 mol% B2O3 + 10.0 mol% CuO ceramic sintered at 870°C for 2h.",

keywords = "Ba(ZnTa)O, BaCu(bO), LTCC, Microwave dielectric properties",

author = "Kim, {Min Han} and Sahn Nahm and Lee, {Woo Sung} and Yoo, {Myong Jae} and Kang, {Nam Kee} and Kim, {Hyo Tae} and Lee, {Hwack Joo}",

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doi = "10.1143/JJAP.44.3091",

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AU - Kim, Min Han

AU - Nahm, Sahn

AU - Lee, Woo Sung

AU - Yoo, Myong Jae

AU - Kang, Nam Kee

AU - Kim, Hyo Tae

AU - Lee, Hwack Joo

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N2 - Sintering temperature of the Ba(Zn1/3Ta2/3)O 3 (BZT) ceramic is about 1550°C and it decreased to 950°C when B2O3 was added. The BaB4O7 second phase whose melting temperature is 889°C was found in the B 2O3 added BZT ceramics. The BaB4O7 second phase assisted the sintering of the BZT ceramics at 950°C. However, the B2O3 added BZT ceramic was not sintered below 950°C and the microwave dielecric properties were not satisfactory. On the other hand, when the B2O3 and the CuO were added, the BZT ceramic was sintered even at 870°C. The BaCu(B2O5) phase which was found in the CuO and B2O3 added BZT ceramics, existed as the liquid phase during the sintering and helped the densification of the BZT ceramics at temperatures lower than 950°C. Good microwave dielectric properties of Q × f = 11,000 GHz, ε r, = 26 and τf = 0.0 ppm/°C were obtained from the BZT + 5.0 mol% B2O3 + 10.0 mol% CuO ceramic sintered at 870°C for 2h.

AB - Sintering temperature of the Ba(Zn1/3Ta2/3)O 3 (BZT) ceramic is about 1550°C and it decreased to 950°C when B2O3 was added. The BaB4O7 second phase whose melting temperature is 889°C was found in the B 2O3 added BZT ceramics. The BaB4O7 second phase assisted the sintering of the BZT ceramics at 950°C. However, the B2O3 added BZT ceramic was not sintered below 950°C and the microwave dielecric properties were not satisfactory. On the other hand, when the B2O3 and the CuO were added, the BZT ceramic was sintered even at 870°C. The BaCu(B2O5) phase which was found in the CuO and B2O3 added BZT ceramics, existed as the liquid phase during the sintering and helped the densification of the BZT ceramics at temperatures lower than 950°C. Good microwave dielectric properties of Q × f = 11,000 GHz, ε r, = 26 and τf = 0.0 ppm/°C were obtained from the BZT + 5.0 mol% B2O3 + 10.0 mol% CuO ceramic sintered at 870°C for 2h.

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