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The effect of polymer concentration on thermophysical, structural and mechanical properties of siloxane-infiltrated silica ceramicsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
- Авторы: Mironov R.A., Georgiu I.F., Solovev A.А., Zabezhailov M.O.
- Журнал: Ceramics International
- Том: 47
- Номер: 7
- Год издания: 2021
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 9888
- Последняя страница: 9895
- DOI: 10.1016/j.ceramint.2020.12.132
- Аннотация: Silica ceramics with the open porosity of 10% was infiltrated with the methyl-phenyl-spirocyclosiloxanol (MPS) acetone solution. Various MPS concentrations in the range of 0.1– 100% were used. Infiltration was followed by the polyfunctional condensation in order toobtain ceramics filled with various volume fractions of the polymethyl-phenyl-spirocyclosiloxane (PMPS). Water absorption capacity, flexural strength, dilatometricthermal expansion, optical and structural properties of the obtained materials were analyzed.As a result, water absorption capacity was less than 0.15% in the range of 1 – 100% MPSfraction in the initial solution, whereas the flexural strength showed logarithmic growth in therange of 45 – 63 MPa with MPS fractional increase. In comparison to the initial ceramics,thermal expansion demonstrated several features that can be related to phase transitions andthermal-oxidative degradation of the polymer. Structural properties were analyzed bymercury and gas porometry and scattering techniques. The mean size of pores, that stayunfilled after infiltration, was shown to rise with the polymer fractional volume increase. Theobtained results indicate that a relatively low fraction of approximately 1% of the MPS in theinitial solution allows to obtain silica ceramics with low water absorption capacity andsufficient flexural strength. It might be attributed to the polymer tendency to fill mostly porethroats.
- Добавил в систему: Георгиу Инир Фанурович