Accept rice material mixes 650 degrees for 950 degrees according to temperature cent, pledge again 400 kilograms / M3, pledge gently 300 kilograms / M3, 300 degrees, coefficient of thermal conductivity 300 degrees of 0.032w/(m.k) , raw material uses asbestine cloth with soft nap, fly ash.
The way of transmission of adiabatic principle caloric of heat-insulating material is accept rice the following 3 kinds of means: Conduct conduct heat, convection conducts heat and radiation conducts heat, accept rice the distinctive heat proof quality of heat-insulating material, originate structure of its unique small hole of accept rice class. The accept rice that passes scientific and reasonable design is small aperture structure, achieved 3 kinds to optimize conduct heat means: Conduct conduct heat: Accept rice the powdery makings particle of heat-insulating material is very small, former unripe particle is controlled in 7 accept rice, the osculatory area between solid particle is very small, make the effect thermal resistance that conducts heat through conducting very great, bring about conduct the effect that conduct heat very low. Convection conducts heat: Accept rice the accept rice particle of heat-insulating material is to reunite body, the small hole diameter that material interior forms is controlled in 20 accept rice, and the aeriform element of material interior keep heats up athletic freedom Cheng, left and right sides of 60 accept rice is below normal temperature, such every gas elements are in by the lock alone stoma is in-house, cannot undertake colliding with other gas element, the inferior to circulating heat also is restricted to be in value of the aeriform member that produces from this, the in-house convection of heat-insulating material passes accept rice heat is almost negligible not plan. Radiation conducts heat: The infra-red radiate below high temperature conducts heat action is very huge, heat-insulating material interior added accept rice to turn over infrared fine pink high temperature resistantly, such turning over infra-red accretion brings about infrared ray by be held back as far as possible and reflex a heat source nidus, make from this the infra-red radiate of material conducts heat effect is very little.
The heat of gas of qualitative adiabatic insulation material conducts SiO2 of accept rice aperture and the heat of material of thermal convection current, solid is conducted is material deliver caloric main avenue, because this explores a kind can at the same time of block up material all sorts of conducting heat the new material of means is crucial place. Try hard to consider ceaselessly through the researcher, siO2 of aperture of final offer rice pledges adiabatic insulation material enters the field of vision of people. Air and body of greater part atmolysis although the thermal conductance when static condition is very small, but the scope that the existence of thermal convection current increased quantity of heat to deliver, and size of small hole of gel of gas of the SiO2 in insulation material of qualitative heat insolation of SiO2 of accept rice aperture is less than 50mm, small hole measure is adequate small and the average and free Cheng that is less than aeriform element, make do not happen between aeriform element collision or collision probability very small, cannot undertake convection conducts heat basically, thereby the heat that block broke aeriform molecule is conducted. SiO2 gas gel the small hole structure of this one ideal makes its thermal conductance below normal temperature even lower than airy, it is 0.01~0.03W · commonly (M · K)-1, porosity can be achieved 99% , the area that compare a list is large, bore diameter distributings evener also, density is 0.003~0.2g · Cm-3; and it still has below normal temperature good pervious to light quality, and the function that screens infrared ray, can drop the ply of thermal insulation and outside temperature apparently, in addition it is mixed in adsorptive sex respect of sound insulation sex is relatively outstanding also. So amorphous SiO2 depends on its unique structure feature and itself performance advantage, make the main body material of insulation material of heat insolation of small hole of preparation accept rice.
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