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Исследование теплозащитных свойств композитного материала жидкое стекло-микрочастицы графита

Исследование теплозащитных свойств композитного материала жидкое стекло-микрочастицы графита

Abstract

Приведены результаты исследования композитного материала жидкое стекло-микрочастицы графита с повышенной термостойкостью и теплоизоляционными свойствами. Предложена композиция, состоящая из графита (42% по массе), жидкого стекла Na 2O(SiO 2) n (50% по массе) и отвердителя натрия кремнефтористого Na 2SiF 6 (8% по массе). Предложена технология получения такой композиции. Экспериментально получены образцы композитного материала с частицами наполнителя (графита) размером несколько микрометров. Это подтверждено исследованием образцов методами рентгеноструктурного анализа и электронной микроскопии. Проведен качественный и количественный фазовый анализ структуры композитного материала. Выявлены значения предельных нагрузок, которые приводят к разрушению композитного материала. Выявлен характер разрывной поверхности. Определены численные значения удельной теплоемкости и коэффициента теплопроводности. Экспериментально получены зависимости удельной теплоемкости и коэффициента теплопроводности от температуры при монотонном нагреве. Исследования подтвердили повышенные теплоизоляционные свойства предложенной композиции. Композитные материалы с такими характеристиками могут быть рекомендованы в качестве покрытий, предназначенных для уменьшения тепловых потерь и устойчивых к воздействию высоких температур. В силу общедоступности и низкой стоимости компонентов предложенный материал может производиться в промышленных масштабах.

Research results for the composite material (CM) water glass-graphite microparticles with high thermal stability and thermal insulation properties are given. A composition consisting of graphite (42 % by weight), water glass Na 2O(SiO 2) n (50% by weight) and the hardener sodium silicofluoric Na 2SiF 6 (8% by weight). Technology of such composition receipt is suggested. Experimental samples of the CM with filler particles (graphite) and a few microns in size were obtained. This is confirmed by a study of samples by X-ray diffraction and electron microscopy. The qualitative and quantitative phase analysis of the CM structure is done. Load limit values ​​leading to the destruction of CM are identified. The character of the rupture surface is detected. Numerical values ​​of specific heat and thermal conductivity are defined. Dependence of the specific heat capacity and thermal conductivity on temperature at monotonic heating is obtained experimentally. Studies have confirmed the increased thermal insulation properties of the proposed composition. CM with such characteristics can be recommended as a coating designed to reduce heat losses and resistant to high temperatures. Due to accessibility and low cost of its components the proposed material can be produced on an industrial scale.

Keywords

КОМПОЗИЦИОННЫЙ МАТЕРИАЛ,COMPOSITE MATERIAL,ТЕПЛОИЗОЛЯЦИОННЫЕ СВОЙСТВА,THERMAL INSULATION PROPERTIES,ЖИДКОЕ СТЕКЛО,WATER GLASS,НАПОЛНИТЕЛЬ ГРАФИТ,GRAPHITE FILLER,РЕНТГЕНОСТРУКТУРНЫЙ АНАЛИЗ,X-RAY ANALYSIS,ТЕПЛОЕМКОСТЬ,ТЕПЛОПРОВОДНОСТЬ,THERMAL CONDUCTIVITY,SPECIFIC HEAT

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold