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Hsu, Chia-Lun; Huang, Cheng−Liang; Chiang, Kuo-Hau

doi:10.1023/a:1025113204419

Cited by 9 publications

(2 citation statements)

References 9 publications

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“…LaAlO 3 has gained attention in the last few years because of its favourable microwave dielectric properties, excellent lattice matching and a good matching for thermal expansion [1][2][3]. Its preparation by the classical solid-state reaction requires a high calcination temperature (1500-1700 °C) and hence induces the sintering and aggregation of particles [4,5].…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Tian

Yang

Lin

2010

AMR

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LaAlO3 has gained attention in the last few years because of its favorable microwave dielectric properties, excellent lattice matching and a good matching for thermal expansion. Nanoparticles of LaAlO3 were produced by using gelatin as an organic precursor. The optimum temperature for the phase formation of the precursor sample is found out by TG/DTA analysis. The specific surface area of the powder was measured by the BET technique with nitrogen. X-ray diffraction (XRD) was used to determine the phases present in the calcined powders and to estimate particle size. The morphology of LaAlO3 powder was studied by transmission electron microscopy (TEM). Microwave dielectric properties were measured using a HP8722ET network analyzer. The results demonstrate that pure perovskite LaAlO3 powder formed at 800 °C for 2 h. And the crystallite size was in the range of 17-48 nm. The specimen sintered at 1450 °C for 8 h shows 97.4% of the theoretical density and gave the excellent microwave dielectric properties: εr=23.3 and Qf=32300 GHz.

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Section: Introductionmentioning

confidence: 99%

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Tian

Yang

Lin

2010

AMR

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“…[9][10][11][12] In the past, a liquid-phase flux of compounds such as B 2 O 3 and CuO was added to lower the sintering temperature of ceramics. 13,14) In this paper, B 2 O 3 was selected as a sintering aid in La(Co 1=2 Ti 1=2 )O 3 since liquid phase sintering after adding glass or other low-melting-point material can be effectively carried out at a low temperature. The crystalline phases, the microstructures and the microwave dielectric properties of B 2 O 3 -doped La(Co 1=2 Ti 1=2 )O 3 ceramics were investigated.…”

mentioning

confidence: 99%

Effect of B₂O₃ Addition to La(Co_1/2Ti_1/2)O₃ Ceramics on Sintering Behavior and Microwave Dielectric Properties

Tseng¹,

Huang²

2006

Jpn. J. Appl. Phys.

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Sintering behaviors and microstructural characteristics of La(Co 1=2 Ti 1=2 )O 3 ceramics were investigated. The La(Co 1=2 Ti 1=2 )O 3 ceramics were prepared by the conventional solid-state route. Doping with B 2 O 3 (up to 0.75 wt %) can effectively promote the densification of La(Co 1=2 Ti 1=2 )O 3 ceramics at a low sintering temperature. With B 2 O 3 addition, the sintering temperature of La(Co 1=2 Ti 1=2 )O 3 can be effectively reduced from 1440 to 1230 -1350 C. At 1350 C/6 h, La(Co 1=2 Ti 1=2 )O 3 ceramic with 0.25 wt % B 2 O 3 addition possesses a dielectric constant (" r ) of 30, a Q Â f value of 64,600 GHz (at 8 GHz) and a temperature coefficient of resonant frequency ( f ) of À48 ppm/ C. The B 2 O 3 -doped La(Co 1=2 Ti 1=2 )O 3 ceramic is applicable in microwave devices requiring low sintering temperature.

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Dielectric properties of B2O3 doped Sm(Co1/2Ti1/2)O3 ceramics at microwave frequency

et al. 2007

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Cited by 9 publications

References 9 publications

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Effect of B₂O₃ Addition to La(Co_1/2Ti_1/2)O₃ Ceramics on Sintering Behavior and Microwave Dielectric Properties

Dielectric properties of B2O3 doped Sm(Co1/2Ti1/2)O3 ceramics at microwave frequency

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Untitled

Cited by 9 publications

References 9 publications

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Sol-Gel Synthesis and Characterization of LaAlO<sub>3</sub> Nanoparticles Using Gelatin as Organic Precursor

Effect of B2O3 Addition to La(Co1/2Ti1/2)O3 Ceramics on Sintering Behavior and Microwave Dielectric Properties

Dielectric properties of B2O3 doped Sm(Co1/2Ti1/2)O3 ceramics at microwave frequency

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Effect of B₂O₃ Addition to La(Co_1/2Ti_1/2)O₃ Ceramics on Sintering Behavior and Microwave Dielectric Properties