Melt quartz brick is quartz of tall purity of a kind of high accuracy material, production methods is will pure quartz arenaceous the melt quartz Tuo that is put inside electric stove to heat to be made to melt of 1800 ℃ above, have cut through professional cut equipment next, all sorts of norms size can be produced. Common purity SiO2>99.5% . Tall purity SiO2≥99.99% . Because many 0.003-0.3mm bleb is contained in vitreous body,make spectrum dispersive. Assume opaque position so. The gas in persnickety bubble is contained make an appointment with 60%CO; 10%CO2; 8%O2 and 22%N2. This is gender, thermal stability, infra-red to the heat insolation of vitreous body absorb with blast off etc will bring beneficial use effect. It is a kind of advanced and fireproof material.
Melt quartz is by high pure the material of photograph of amorphous silicon qualitative glass that silicon forms after fusion of qualitative raw material. Its are main the characteristic is to have ℃ of extremely low 0.54 X 10-6 of linear expansion coefficient - 1000 ℃ of 1(0 ～ ) , good heatproof shake sex and fireproof degree very tall, thermal conductance is low and fight aggressivity wonderfully to be able to have coefficient of fireproof, wear-resisting, high temperature resistant, linear expansion small wait for a characteristic, be used at kiln of pottery and porcelain to provide consequently, the immersion water mouth of steel-making industry, steel includes the place such as sleeve brick; Wide also application is cast at nicety, the respect such as emery wheel abrasive, advanced glasswork.
Can divide according to the transparent degree of melt quartz for transparent melt quartz and opaque melt quartz; Among them, because cost is high, transparent melt quartz often does not use as fireproof raw material, is a part only the leftover pieces of transparent vycor just uses as fireproof raw material. Partial melt quartz can produce dry type pound dozen of makings and heatproof shake sex with a future life good pouring makings. The SiO2 content of transparent melt quartz > 99.9% , density 2.20g/cm3, thermal conductance 0.992/W· (M·K) , bate temperature 1430 ℃ ; The SiO2 content of opaque melt quartz > 99.5% , density 2.07 ～ 2.10g/cm3, thermal conductance 0.795 ～ 0.837/W· (M·K) , bate temperature 1480 ℃ of 1430 ～ ;
Opaque melt quartz contains the scattering particle such as a large number of tiny bleb, make vitreous body submits opaque or translucent form; Normally with pure quartz arenaceous for raw material, with charcoal club resistor furnace or frit of electric arc furnace are made, siO2 content is in normally 99.5% above, thermal conductance is more transparent of melt quartz low.
Melt quartz is oxidation silicon (quartz, silica) the condition that be not brilliant (vitreous condition) . It is typical glass, its atom structure grows Cheng not to have foreword. It offers its through link of three-dimensional structure across high use temperature and small hot coefficient of expansion. Raw material of will handpick high grade silica [Sio2>99% ] , in the melt inside electric arc furnace or resistor furnace, melt temperature is 1695-1720 ℃ . Because Sio2 fuse-element viscosity is tall, square Pa·s is 7 times of 10 when 1900 ℃ , cannot shape with casting method, refrigeration hind is vitreous body, can serve as firing goods or do not burn goods raw material.
Melt quartz regards raw material of fireproof material, pottery and porcelain and vitreous raw material, epoxy resin as pouring, electron commonly source of sealed makings, lighting, medical treatment, cast, the main raw material that waits for an industry, also be the ideal inserts of the chemical industry such as paint, coating.
The upside pool wall that basically is used at build by laying bricks or stones to build the furnace that uses frit to make glass of low alkaline boracic silicate.
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