Preparation of Melted-MgO-Based Ceramics Using Metastable Solid δ-Bi2O3 as a Binder

— We have studied the influence of the sintering temperature and time and the composition and amount of the metastable binder δ*-Bi 2 O 3 on the strength properties of ceramics prepared from cast MgO and demonstrated the feasibility of producing dense ceramics with a hardness of up to 67–68 HRC usin...

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Bibliographic Details
Published in:Inorganic materials 2023, Vol.59 (1), p.105-113
Main Authors: Bermeshev, T. V., Zhereb, V. P., Tarasova, L. S., Bundin, M. P., Yasinsky, A. S., Yushkova, O. V., Voroshilov, D. S., Bespalov, V. M., Yur’ev, P. O., Samoilo, A. S., Mazurova, E. V., Khlystov, D. V.
Format: Article
Language:English
Subjects:
Bismuth trioxide
Ceramics
Chemical activity
Chemistry
Chemistry and Materials Science
Decomposition
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Magnesium oxide
Materials Science
Metastable phases
Metastable state
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Summary:— We have studied the influence of the sintering temperature and time and the composition and amount of the metastable binder δ*-Bi 2 O 3 on the strength properties of ceramics prepared from cast MgO and demonstrated the feasibility of producing dense ceramics with a hardness of up to 67–68 HRC using the metastable phase δ*-Bi 2 O 3 , without mechanical load. A unique feature of the materials studied here is the possibility of bonding starting ceramic particles on account of the high chemical activity of metastable phases and products of their decomposition “at the instant of conversion” as a result of the local increase in temperature due to the exothermic decomposition of the metastable states.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168523010041