Tungsten heating shields and working racks is best choice for LED Sapphire melting growing furnace application.

 

Tungsten heating shields and working racks is best choice for LED Sapphire melting growing furnace application 

 

 

1. Physical and chemical properties

(1) Density: 19.2g /cm3(2) Surface roughness: < 3.2

(3) Purity: W99.97%(min.)

(4) Application temperature environment:1800~2750

 

2. Specifications: 

1)Dimensions and tolerances Unit:mm

thickness [mm]	tol [mm]	width [mm]	tol [mm]	length [mm]	tol [mm]	quality	flatness in %
0.100	+/- 0.030	200.0	+/- 0.47	1000	+5/-0	cold rolled, bright	15
0.200	+/- 0.035	200.0	+/- 0.47	1000	+5/-0	cold rolled, bright	15
0.300	+/- 0.035	200.0	+/- 0.70	1000	+5/-0	cold rolled, bright	15
0.400	+/- 0.050	200.0	+/- 0.70	1000	+5/-0	cold rolled, pickled	15
0.500	+/- 0.060	200.0	+/- 1.00	1000	+5/-0	cold rolled, pickled	15
0.500	+/- 0.110	500.0	+/- 1.20	1000	+5/-0	hot rolled, pickled	20
1.000	+/- 0.200	500.0	+/- 1.20	1000	+5/-0	hot rolled, pickled	20

3. Manufacturing process and equipment

Item	Process	Equipment	Quality check point
1	Powder mixed and purified	Mixer and Purified furnace	GDMS Powder grain size properties
2	Pressed & machined blank	Isostatic pressing machine	Measurement of rough-processed
3	sintering	High temperature vacuum sintering furnace	Dimension measurements for product
4	Hot rolling	Hot rolling machine	Measurements (thickness , width)
5	Annealing	Anneal furnace	Side crack, stratification for top
6	Check		Dimension Flatness and density
7	Warm rolling	High speed rolling machine	Dimension Flatness and density
8	Annealing	Annealing furnace
9	Check		Dimension Flatness and density
10	Cold rolling	High speed rolling machine
11	cutting	Hydraulic cutting machine	Dimension Measurements
12	annealing	Vacuum annealing furnace	Surface quality bubble on surface,
13	machining	x-ray cutting machine	stress, Flatness
14	check	Flat-stone mill	Final Quality
15	package		certificate of quality

 

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