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Time of issue:2020-03-17 00:00:00

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Tungsten/ W/ Wolfram heater

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Tungsten/ W/ Wolfram heater

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Ⅰ、Physical and chemical properties

1  Tungsten heater

1.1  Purity:W≥99.95%;

1.2  Density:≥19.1g/cm3

1.3  Application temperature environment:≤2300℃;

2  Copper base

2.1  Purity:Cu≥99.95%;

2.2  Density:≥8.8g/cm3

2.3  Application temperature environment:≤1000℃;

 

Ⅱ、Measurements and tolerances

Unit:mm 

         Tungsten heater

Diameter

Diameter

tolerance

Width

Width

tolerance

Height

Height

tolerance

Remark

3.0

±0.1

≤650

±1

≤1200

±1

Shape of bottom and design of bendingradius will be Manufactured according  to customers’ requirements

4.0

±0.1

≤600

±1

≤1150

±1

5.0

±0.1

≤550

±1

≤1100

±1

6.0

±0.2

≤550

±1

≤1050

±1

7.0

±0.2

≤500

±1

≤1000

±1

8.0

±0.2

≤500

±1

≤950

±1

9.0

±0.2

≤450

±1

≤900

±1

Copper base will be Manufactured according to customers’ requirements and processed with CNC lathe

 

Ⅲ、  Manufacture process and equipment

Tungsten heater Item Process Equipment Quality check point
1 Tungsten rod   1. Physical and chemical properties
2 Clean   2. Length, straightness, diameter and circularity
3 Check   3. Surface quality
4 Bend Bending machine 1. Length and width dimensions
5 Regulate Correct mold 2. Arc diameter
6 Check   3. Surface quality
7 Wire cutting Wire cutting machine 1. Surface quality
8 Clean   2. Dimensions, arc diameter, and tolerances
9 Check   3. Issue certificate of quality
10 Pack    

 

Ⅳ、Application
As the heating source in the sapphire growth furnace, tungsten heater will have decisive effect on the formation of  temperature gradient for AL2O3.
In this way, high purity, high density, reasonable design and excellent fabrication of the tungsten heater will have have important significance on the
quality control of sapphire ingots, saving of energy and extension of working life.

 

Keyword:
Tungsten heater
Tungsten rod
tungsten rods
copper base
tungsten bars
tungsten bar
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