CHARACTERISTICS OF FIRE PROTECTIVE COATING THE TERNARY SOLUBLE SILICATE

CHARACTERISTICS OF FIRE PROTECTIVE COATING THE TERNARY SOLUBLE SILICATE

The fire protective coating can reduce certain damages in case of fire, also conserve energy by thermal insulation and prevent corrosion and errosion in normal daily life by means of blocking thermal transfer, that were generally made of organic, inorganic and metallic materials as adiabatic coating. In case of inorganic material such as soluble silicate, it produces less toxic substances which are exposed to Ore, and have a plenty of raw material. Also inorganic thermal insulator is good in heat resistance. To develope such a excellent inorganic thermal insulator, the study of fire protective coating using the alkali silicate is necessary The principle of intumescence for alkali silicate is from rapid evolution of water in the coating material, the quantity of water in it is of course influenced on the degree of intumescence. The phenomenon of intumescence in ternary silicate is increased as the radius of ion is bigger, and this is caused by evolution of so many kinds of water. The individual degree of intumescence is ordered like this ; <TEX>$K^+$</TEX> > <TEX>$Na^+$</TEX> > <TEX>$Li^+$</TEX> . The best protection effect is similarity found to intumescence of ternary silicate. The result of X-ray diffraction analysis indicates that <TEX>$KHSi_2O_5$</TEX> is an important ingredient in K-silicate.