Formation of material prescribed phase composition from refractory filler silica powder modified with alkoxide and sol-gel composite
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Дата
2014
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
Kluwer Academic/Plenum Publishers, USA
Анотація
Creation of ceramics and refractories with improved physicomechanical properties is possible with use of
nanomaterials in their technology. Introduction of SiC nanoparticles into a ceramic material charge by using
modified filler powders is proposed. Fillers modified with tetraethoxysilane during grinding leads to powder
crystal structure breakdown and SiC mechanochemical synthesis. The amount of -SiC synthesized in this
way depends on the amount of modifying additive. Results are provided for modified filler phase composition
before and after heat treatment at 1000°C, and mechanochemically synthesized SiC thermal stability is established. It is shown that sintering of modified electro-corundum worsens with an increase in amount of synthesized silicon carbide nanoparticles. The difference is demonstrated in phase composition formation with heat treatment of a mixture of modified and normal finely ground electrocorundum with a sol-gel binder and firing up to 1600°C. Silicon carbide nanoparticle synthesis does not exceed 3 – 7 % in both cases. Recommendations are given for use of corundum filler with a different amount of modifying additive.
Опис
Ключові слова
filler, modification, tetraethoxysilane, synthesis, powder sintering, phase composition, β-SiC nanoparticles
Бібліографічний опис
Formation of material prescribed phase composition from refractory filler silica powder modified with alkoxide and sol-gel composite / G. D. Semchenko [et al.] // Refractories and Industrial Ceramics. – 2014. – Vol. 55, iss. 3. – P. 240-243.