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        • Product Name  Tungsten/ W/ Wolfram heater
        • Views   2631

        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.