Effect of absorbed power and dopant content on densification during rapid microwave sintering of Bi2O3‐doped ZnO

ZnO samples with an addition of 0, 0.035, 0.1, and 0.35 mol.% Bi2O3 were microwave sintered at heating rates 10 and 50°C/min to a maximum temperature of 1200°C with zero hold time. The densification curves obtained by optical dilatometry have been studied in their dependence on the dopant concentrat...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2023-02, Vol.106 (2), p.878-887
Main Authors: Egorov, Sergei V., Eremeev, Anatoly G., Kholoptsev, Vladislav V., Plotnikov, Ivan V., Rybakov, Kirill I., Sorokin, Andrei A., Rostokina, Elena Ye, Balabanov, Stanislav S.
Format: Article
Language:English
Subjects:
bismuth oxide
Bismuth oxides
Bismuth trioxide
Densification
Dilatometry
Dopants
Heating rate
Low temperature
Microwave sintering
Microwaves
Zinc oxide
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Summary:ZnO samples with an addition of 0, 0.035, 0.1, and 0.35 mol.% Bi2O3 were microwave sintered at heating rates 10 and 50°C/min to a maximum temperature of 1200°C with zero hold time. The densification curves obtained by optical dilatometry have been studied in their dependence on the dopant concentration and the heating rate. Direct volumetric absorption of microwave radiation resulted in a 50–60°C shift of the densification curves toward low temperatures compared to susceptor‐assisted heating. An analysis of the effect of the volumetrically absorbed microwave power on the formation of grain‐boundary phases that facilitate densification is presented.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.18817