1)light grey,thin wall,hollow,light weight.
2)Volume weighs is 250 - 450kg /m3,granularity diameter is about 1 mm ,
Hollow glass micropheres is a hollow ball collected from coal powder,its coloure is light grey,thin wall,hollow,light weight.Volume weighs is 250----450kg /m3,granularity diameter is about 1 mm ,its surface is smooth and closed, and small heat conductivity, fire resistant rate ≥ 1700 °C,it is a good refractory insulation .
It is widely used in the light castable production and oil wells.The chemical composition of the hollow galss microsphaeres mainly contains SiO2 and Al2O3, with fine particles ,hollow, high strength and durable, resistant to temperature etc.It has been uesed in all fields
1)Chemicals Compositions :
Items | SiO2 | Al2O3 | Fe2O3 | SO3 | CaO | MgO | K2O | Na2O |
Content(%) | 50-55 | 25-33 | 2-5 | 0.1-1.0 | 0.5-1.2 | 0.8-2.0 | 0.5-1.1 | 0.3-0.9 |
2)Physical characteristics:
Items | Testing Datas | Items | Testing Datas |
Appearance | High LiquidityBall powder | Granularity (um) | 10-400 |
Colour | Light Grey | Specific Asisstance(Ω.CM) | 1010-1013 |
Atual Density (g/cm3) | 0.5-0.99 | Hardness in Mohs’ scale | 6-7 |
Bulk Density (g/cm3) | 0.3-0.5 | PH Value | 6 |
Refractoriness °C | 1750 | Melting Temperature(°C) | ≥1400 |
Temperature Factor(m2/h) | 0.000903-0.0015 | Thermal Conductivity (w/m·k) | 0.054-0.095 |
Compression Strength (Mpa) | ≥350 | Refractive Index | 1.54 |
Coasting Loss % | 1.33 | Oil Absorptiong(oil)/g | 0.68-0.69 |
Volume Weight kg/m3 | 250---450 | Granular diameter mm | 0.1 |
Humidity | 1.6 max |
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3)Granulation: 40-60 mesh,80-120 mesh,150—200 mesh,over 200 mesh