Specifications

VGF PBN Crucibles
1:Chemically inert to almost all metals, liquids and gas
2:Outstanding microwave and infrared transmission

 Vertical Gradient Freeze (VGF) technology is the most popular technique to grow crystals for high quality substrates such as GaAs and InP in the compound semiconductor industry. The application of PBN crucibles to grow Gallium Arsenide and Indium Phosphide crystals ensures the purity of your final crystals and thus improves the performance of the products.

 

Fu Qiang has the capabilities to produce all types of high quality VGF PBN crucibles based on your own specifications. 

 

Catalog No	Application	ID	H	Taper	T
FQ200	VGF	2	10	0.7°	0.035
FQ201	VGF	3	10	0.7°	0.035
FQ202	VGF	4	8	0.5°	0.035
FQ203	VGF	5	8	0.3°	0.04
FQ204	VGF	6	7	0.3°	0.04

 

 

 

Apparent Density	g/cc	2.15 - 2.19 (crucible)	2.10 - 2.15 (sheet)
Gas permeability (He)	cc/s	<1 x 10e-10
Micro hardness (Knoop)	N/mm²	691.88 (a-b plane)
Tensile strength	N/mm²	153.86 (parallel)
Bending strength	N/mm²	243.63 (parallel)	197.76 (perpendicular)
Modulus of elasticity	N/mm²	235690
Specific heat capacity	cal/g.°C	0.371 (@ 200°C)	0.442 (@ 900°C)
Thermal conductivity 200°C	W/cm.k	0.6 (parallel)	0.026 (perpendicular)
Thermal conductivity 900°C	W/cm.k	0.4370 (parallel)	0.028 (perpendicular)
Dielectric strength (RT)	KV/mm	56
Volume resistivity	ohm.cm	3.11 x 10e13