Bond theory, vibrational spectroscopy, and dielectric responses of trirutile ATa2O6 (A = Mg, Ni) microwave ceramics

Yang, Hongyu; Guo, Zexu; Xiong, Zhe; Yang, Jun; Wang, Xiaoyan; Wang, Gang; Xu, Chengzhi; Li, Zhimin

doi:10.1016/j.ceramint.2024.03.017

Ceramics International

2024

DOI: 10.1016/j.ceramint.2024.03.017

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Bond theory, vibrational spectroscopy, and dielectric responses of trirutile ATa2O6 (A = Mg, Ni) microwave ceramics

Hongyu Yang,

Zexu Guo,

Zhe Xiong

et al.

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Cited by 3 publications

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Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Shi,

Zhang,

et al. 2024

J Mater Sci: Mater Electron

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Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Shi,

Zhang,

et al. 2024

J Mater Sci: Mater Electron

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Enhanced dielectric properties of Mg4Nb2O9 ceramic by Ti substitution

Wang,

Ma,

Xiong

et al. 2024

J Mater Sci: Mater Electron

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Effect of binary ion substitution on the crystal structure and microwave dielectric properties of MgTa₂O₆ ceramics

Gao,

Chen,

Fang

et al. 2024

J Am Ceram Soc.

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Mg1/3A11/3A21/3Ta2O6 ceramics (where A1 and A2 represent Co, Ni, or Zn) were prepared using the solid‐phase reaction route. The results of X‐ray diffraction and Raman tests showed that (Co1/2Ni1/2)2+, (Co1/ 2Zn1/2)2+, and (Ni1/2Zn1/2)2+ ions replaced Mg2+ ions in the lattice of MgTa2O6, resulting in the formation of a pure tri‐rutile structure. All three complex ions could significantly reduce the sintering temperature of the ceramics (by 150°C–200°C) and could broaden the sintering window. The large deviation (48.8%–69.2%) between the porosity corrected relative permittivity εr‐corr. and the theoretical relative permittivity εr‐theo. might be due to the overestimation of the ionic polarizability of Ta5+ by Shannon. (Co1/2Ni1/2)2+ has the most significant effect of increasing the bond energy of ceramic A–O bonds, reducing the τf value from 51 to 36 ppm/°C. In addition, the mechanisms affecting their dielectric properties are discussed based on bond ionicity (fi), full width at half maximum (FWHM) of Raman peak, and bond energy (E). Mg1/3Co1/3Ni1/3Ta2O6 ceramic sintered at 1350°C have the most excellent microwave dielectric properties: εr = 26.8, Q × f = 86,000 GHz, and τf = 36 ppm/°C.

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Bond theory, vibrational spectroscopy, and dielectric responses of trirutile ATa2O6 (A = Mg, Ni) microwave ceramics

Cited by 3 publications

References 39 publications

Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Enhanced dielectric properties of Mg4Nb2O9 ceramic by Ti substitution

Effect of binary ion substitution on the crystal structure and microwave dielectric properties of MgTa₂O₆ ceramics

Contact Info

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Resources

About

Bond theory, vibrational spectroscopy, and dielectric responses of trirutile ATa2O6 (A = Mg, Ni) microwave ceramics

Cited by 3 publications

References 39 publications

Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Effect of lowering the sintering temperature in Mg4Nb2O9 microwave ceramic by doping LMBS glass

Enhanced dielectric properties of Mg4Nb2O9 ceramic by Ti substitution

Effect of binary ion substitution on the crystal structure and microwave dielectric properties of MgTa2O6 ceramics

Contact Info

Product

Resources

About

Effect of binary ion substitution on the crystal structure and microwave dielectric properties of MgTa₂O₆ ceramics