Amelioration of sintering and multi-frequency dielectric properties of Mg3B2O6: A mechanism study of nickel substitution using DFT calculation

With the support of density functional theory (DFT) calculation, the amelioration of sintering and dielectric properties of the Mg 3 B 2 O 6 (MBO) ceramic was realized through the substitution of magnesium with nickel. The TE-mode cylindrical cavity method was used to measure the dielectric properti...

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Bibliographic Details
Published in:Journal of advanced ceramics 2021-12, Vol.10 (6), p.1398-1407
Main Authors: Peng, Rui, Lu, Yongcheng, Zhang, Qin, Lai, Yuanming, Yu, Guoliang, Wu, Xiaohui, Li, Yuanxun, Su, Hua, Zhang, Huaiwu
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Densification
Density functional theory
Dielectric properties
Glass
Magnesium
Materials Science
Mathematical analysis
Mechanical properties
Microstructure
Nanotechnology
Natural Materials
Nickel
Phase composition
Research Article
Sintering
Structural Materials
Substitutes
Thermal analysis
Thermomechanical analysis
Vibration mode
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Summary:With the support of density functional theory (DFT) calculation, the amelioration of sintering and dielectric properties of the Mg 3 B 2 O 6 (MBO) ceramic was realized through the substitution of magnesium with nickel. The TE-mode cylindrical cavity method was used to measure the dielectric properties at different frequencies. The thermo-mechanical analysis and simultaneous thermal analysis were used to characterize the chemical and mechanical properties. The phase composition was determined through the X-ray diffraction (XRD) and Raman spectrum. The microstructure was investigated using the scanning electron microscopy (SEM). Magnesium substitution with nickel (4 mol%) could ionize the B-O bond of BO 3 , modify the vibration mode, improve the order degree, densify the microstructure, decrease the intrinsic densification temperature, and ameliorate the dielectric properties of the MBO ceramics. The maximum values were achieved for the ceramics with 4 mol% nickel and sintered at 1175 °C, that is, 97.2% for relative density, 72,600 GHz (10 GHz), 75,600 GHz (11.4 GHz), and 92,200 GHz (15 GHz) for Q × f , 7.1 (10 GHz), 7.01 (11.4 GHz), and 6.91 (15 GHz) for ε r , and −56.3 ppm/°C for τ f .
ISSN:2226-4108
2227-8508
DOI:10.1007/s40145-021-0515-9