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    Fused Silica Quartz Crystal Glass Ceramic Silica Crucible For Melting

 

The silica crucible can be used under 1450 degrees,divide into two kinds of crucibles:transparent and opaque.

By using electric arc method to produce translucent silica crucible,that is large scale integrated circuit indispensable materials.

Today the world semiconductor industry developed countries have used this silica crucible to replace the small crucible. He has a high purity,strong temperature tolerance, large size and high precision, good heat preservation and energy saving,stable quality, etc.

can't contact with HF, when it is on high temperature,extremely the quartz crucible react with caustic alkali and alkali metal carbonate.

In addition to the HF,silica crucible common dilute mineral acid can be used as a cleaning fluid.Domestic used control monocrystalline silica crucible is 18 inches and 20 inches and 22 inches and other manufacturers use more than 22 and crucible.

Our production technology is mature.

The process flow

High purity quartz sand--high purity graphite mould--vacuum molding material--vacuum arc melting system--natural cooling demoulding--silica crucible initial tests--cold sand blasting,cutting and chamfering--silica crucible secondary testing--super clean cleaning--ultrasonic, high pressure spraying,automatic drying.Heating oven,spraying--silica crucible test three times,vacuum packaging--storing 

For silica crucible manufacturers face distress,applicating portable digital microscope,can undertake silica crucible test anytime and anywhere,can also take photos,video record silica crucible test results in real time,making up for the inadequacy of the silica crucible laboratory testing aspects.

 

Material                                                         Data
SIO2 :	99.9 %
Density :	2.2(g/cm3)
Degree of hardness moh' scale :	6.6
Melting point:	1732°C
Working temperature :	1100°C
Max temperature can reach in a short time :	1450°C
Acid tolerance:	30 times than Ceramics , 150 times than Stainless steel
Visible light transmittance :	above 93%
UV spectral region transmittance:	80%
Resistance value :	10000 times than ordinary glass
Annealing point:	1180°C
softening point:	1630°C
Strain point:	1100°C

 

Roundness

 

	Specification			ID tolerance
	10≤D<30			+0.0 -0.3
	30≤D<100			+0.0 -0.5
	100≤D<200			+0.0 -0.7
	200≤D≤300			+0.0 -1.0
	300≤D≤400			+0.0 -2.0
Thickness		Specification	Wall tolerance
		1≤δ<3	±0.2
		3≤δ<8	±0.3
		8≤δ<12	±0.5
		12≤δ<20	±0.6