Low-temperature sintering and microwave dielectric properties of Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>0.8</inf>Ti<inf>0.2</inf>]<inf>3−δ</inf> with glass frit added

Chi Seung In, Dong Hun Yeo, Hyo Soon Shin, Sahn Nahm, Won Youl Choi

Research output: Contribution to journalArticle

Abstract

In accordance with the trend for mobile terminals to be high intensity and to have thinner layers, low temperature co-fired ceramics (LTCC) materials with outstanding dielectric loss characteristics and diverse dielectric constants have been in demand, and the need for high-strength materials that can withstand external shocks has increased. Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>1−x</inf>Ti<inf>x</inf>]O<inf>3−δ</inf> (CLNT) has a quality factor over 14,000 and τ<inf>f</inf> ≤ 10 when the dielectric constant is 41 ∼ 46, but its sintering temperature is high at 1150 °C. Therefore, it cannot be used as a LTCC component. This study aimed to lower the sintering temperature to 900 °C by adding a low-melting-point glass such as B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·BaO and B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·Al<inf>2</inf>O<inf>3</inf>. As the glass content in CLNT was increased from 10 wt% to 20 wt%, the density and the Q·f<inf>0</inf> property decreased, and the dielectric constant rose. When B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·BaO was added to CLNT at 15 wt%, the dielectric constant was found to be 27, the Q·f<inf>0</inf> property to be 3470, and the τ<inf>f</inf> to be −18 ppm/°C. When B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·Al<inf>2</inf>O<inf>3</inf> was added to CLNT at 10 wt%, the dielectric constant was 20, the Q·f<inf>0</inf> property was 3990, and the τ<inf>f</inf> was −15 ppm/°C. As such, in both cases, excellent dielectric properties were observed.

Original languageEnglish
Pages (from-to)1140-1143
Number of pages4
JournalJournal of the Korean Physical Society
Volume66
Issue number7
DOIs
Publication statusPublished - 2015 Apr 1

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frit
dielectric properties
sintering
permittivity
microwaves
glass
ceramics
high strength
dielectric loss
melting points
Q factors
shock
trends

Keywords

  • B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·BaO
  • Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>1−x</inf>Ti<inf>x</inf>]O<inf>3−δ</inf>
  • Glass
  • LTCC
  • Microwave dielectric properties

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Low-temperature sintering and microwave dielectric properties of Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>0.8</inf>Ti<inf>0.2</inf>]<inf>3−δ</inf> with glass frit added. / In, Chi Seung; Yeo, Dong Hun; Shin, Hyo Soon; Nahm, Sahn; Choi, Won Youl.

In: Journal of the Korean Physical Society, Vol. 66, No. 7, 01.04.2015, p. 1140-1143.

Research output: Contribution to journalArticle

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abstract = "In accordance with the trend for mobile terminals to be high intensity and to have thinner layers, low temperature co-fired ceramics (LTCC) materials with outstanding dielectric loss characteristics and diverse dielectric constants have been in demand, and the need for high-strength materials that can withstand external shocks has increased. Ca[(Li1/3Nb2/3)1−xTix]O3−δ (CLNT) has a quality factor over 14,000 and τf ≤ 10 when the dielectric constant is 41 ∼ 46, but its sintering temperature is high at 1150 °C. Therefore, it cannot be used as a LTCC component. This study aimed to lower the sintering temperature to 900 °C by adding a low-melting-point glass such as B2O3·SiO2·BaO and B2O3·SiO2·Al2O3. As the glass content in CLNT was increased from 10 wt{\%} to 20 wt{\%}, the density and the Q·f0 property decreased, and the dielectric constant rose. When B2O3·SiO2·BaO was added to CLNT at 15 wt{\%}, the dielectric constant was found to be 27, the Q·f0 property to be 3470, and the τf to be −18 ppm/°C. When B2O3·SiO2·Al2O3 was added to CLNT at 10 wt{\%}, the dielectric constant was 20, the Q·f0 property was 3990, and the τf was −15 ppm/°C. As such, in both cases, excellent dielectric properties were observed.",
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T1 - Low-temperature sintering and microwave dielectric properties of Ca[(Li1/3Nb2/3)0.8Ti0.2]3−δ with glass frit added

AU - In, Chi Seung

AU - Yeo, Dong Hun

AU - Shin, Hyo Soon

AU - Nahm, Sahn

AU - Choi, Won Youl

PY - 2015/4/1

Y1 - 2015/4/1

N2 - In accordance with the trend for mobile terminals to be high intensity and to have thinner layers, low temperature co-fired ceramics (LTCC) materials with outstanding dielectric loss characteristics and diverse dielectric constants have been in demand, and the need for high-strength materials that can withstand external shocks has increased. Ca[(Li1/3Nb2/3)1−xTix]O3−δ (CLNT) has a quality factor over 14,000 and τf ≤ 10 when the dielectric constant is 41 ∼ 46, but its sintering temperature is high at 1150 °C. Therefore, it cannot be used as a LTCC component. This study aimed to lower the sintering temperature to 900 °C by adding a low-melting-point glass such as B2O3·SiO2·BaO and B2O3·SiO2·Al2O3. As the glass content in CLNT was increased from 10 wt% to 20 wt%, the density and the Q·f0 property decreased, and the dielectric constant rose. When B2O3·SiO2·BaO was added to CLNT at 15 wt%, the dielectric constant was found to be 27, the Q·f0 property to be 3470, and the τf to be −18 ppm/°C. When B2O3·SiO2·Al2O3 was added to CLNT at 10 wt%, the dielectric constant was 20, the Q·f0 property was 3990, and the τf was −15 ppm/°C. As such, in both cases, excellent dielectric properties were observed.

AB - In accordance with the trend for mobile terminals to be high intensity and to have thinner layers, low temperature co-fired ceramics (LTCC) materials with outstanding dielectric loss characteristics and diverse dielectric constants have been in demand, and the need for high-strength materials that can withstand external shocks has increased. Ca[(Li1/3Nb2/3)1−xTix]O3−δ (CLNT) has a quality factor over 14,000 and τf ≤ 10 when the dielectric constant is 41 ∼ 46, but its sintering temperature is high at 1150 °C. Therefore, it cannot be used as a LTCC component. This study aimed to lower the sintering temperature to 900 °C by adding a low-melting-point glass such as B2O3·SiO2·BaO and B2O3·SiO2·Al2O3. As the glass content in CLNT was increased from 10 wt% to 20 wt%, the density and the Q·f0 property decreased, and the dielectric constant rose. When B2O3·SiO2·BaO was added to CLNT at 15 wt%, the dielectric constant was found to be 27, the Q·f0 property to be 3470, and the τf to be −18 ppm/°C. When B2O3·SiO2·Al2O3 was added to CLNT at 10 wt%, the dielectric constant was 20, the Q·f0 property was 3990, and the τf was −15 ppm/°C. As such, in both cases, excellent dielectric properties were observed.

KW - B<inf>2</inf>O<inf>3</inf>·SiO<inf>2</inf>·BaO

KW - Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>1−x</inf>Ti<inf>x</inf>]O<inf>3−δ</inf>

KW - Glass

KW - LTCC

KW - Microwave dielectric properties

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JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

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