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        • Product Name  Tungsten/ W/ Wolfram crucible/liner
        • Views   320

        Ⅰ、Physical and chemical properties

         1  Purity :W≥99.95%;

         2  Density:≥18.2g/cm3

         3  Application temperature environment:2300℃。

         

        Ⅱ、Measurements and tolerances

        Unit:mm

        Delivery condition

        Specification

        Tolerance

        Thickness

        Roughness   (μm)

        Diameter

        Height

        Diameter

        Height

        Sinter

        10~500

        10~750

        ±5.0

        ±5.0

        8~20

         

        Finished sinter

        10~450

        10~550

        ±0.5

        ±1.0

        7~18

        <2.5

        Special sizes can be manufactured based on customers' requirements

         

        Manufacturing process and equipment

        Item

        Process

        Equipment

        Quality Check point

        1

        Tungsten powder

         

        1  Purity of tungsten powder

        2

        Sieving

        High frequency vibrating screen

        2  FsssHB

        3

        Mixed powder

        V shape mixer

        3  Green strength

        4

        Isostatic pressing

        Isostatic pressing machine

        1  Measurement of rough-processed billet

        5

        Rough billet lathing

        CNC vertical turning machine

        2  Surface quality of rough-processed billet

        6

        IF sintering

        IF induction sintering furnace

        1  Outside measurements of finished product

        7

        Competitive products  lathing

        High-accuracy vertical turning machine

        2  Surface quality and roughness of finished productdensity

        8

        Package

         

        3  Show certificate of quality

         

         Ⅳ、Application

        Since the melting point of tungsten has reached 3410℃, tungsten crucible is widely applied in  industry furnace such as sapphire growth furnace, quartz glass melting furnace, and rare earth smelting furnace。The temperature in working environment of tungsten crucible is above 2000℃。 For sapphire crystal growth furnace, high-purity, high- density, no internal -crack tungsten crucible with other features of exact measurement and smooth surface has decisive influence on success ratio of seed growth, quality control of pulling crystal, metamictization pot-committed and service life during sapphire growth process。

        Tungsten crucible Liners (W crucible; W liners; wolfram crucible; wolfram liner) are very useful in electron-beam evaporation as they typically increase the evaporation rates of the material being deposited and they simplify the task of changing from one evaporation material to another. Crucible Liners are available in a variety of sizes.