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Journal of Materials Science: Materials in Electronics

The sintering behavior and microwave dielectric properties of 0.67CaTiO3–0.33LaAlO3 ceramics sintered at medium temperatures with the additives of H3BO3–Li2CO3

  • 27-07-2020
Published in:
Authors
Shuting Niu
Juan Jiang
Jinzhao Wang
Lin Gan
Tianjin Zhang
Published in
Journal of Materials Science: Materials in Electronics | Issue 17/2020

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Abstract

0.67CaTiO3–0.33LaAlO3 (CTLA) microwave dielectric ceramic materials with the additives of H3BO3, Li2CO3 or H3BO3–Li2CO3 were prepared by a conventional solid-state reaction method. The effects of the sintering additives on the densification behavior, phase compositions, microstructures, and microwave dielectric properties of the CTLA ceramic samples were investigated. It was found that the binary additive of H3BO3–Li2CO3 effectively promoted the densification and lowered the sintering temperature of the CTLA ceramic samples without a significant decrease in their Q × f values. For example, with an addition of 0.2 wt% H3BO3–0.1 wt% Li2CO3, the optimal microwave dielectric properties of εr = 45.5, Q × f = 31,771 GHz and a near-zero τf of 2.43 ppm/℃ were obtained in the CTLA ceramic sample sintered at only 1175 ℃, which is significantly lower (~ 225 ℃) compared to the sintering temperatures of conventionally sintered CTLA ceramics.

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previous article Tailoring the low dielectric constant in glutamic acid doped ammonium dihydrogen phosphate single crystal by virtue of MPa shock waves for microelectronic applications: the complex impedance and modulus formulation studies
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Title
The sintering behavior and microwave dielectric properties of 0.67CaTiO3–0.33LaAlO3 ceramics sintered at medium temperatures with the additives of H3BO3–Li2CO3
Authors
Shuting Niu
Juan Jiang
Jinzhao Wang
Lin Gan
Tianjin Zhang
Publication date
27-07-2020
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 17/2020
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-04049-4
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