White Corundum (White fused aluminum oxide)

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White Corundum (White fused aluminum oxide):

electrically fused in arc furnace with high grade processed alumina as raw material. It has higher hardness and slight lower toughness comparing with brown fused alumina. It is also characterized by its high purity, ability of self-sharpening, better cutting, less heat emit, higher efficiency, acid and alkali resistance, good thermal stability. As the abrasive materials, it is suitable for grinding high-speed, high carbon steel, as loose grains, it widely used for bonded and coated abrasives , polishing, precision casting and so on .




WFA Physical and Chemical Index

Chemical

Content(%)

Al2O3

99

Na2O

0.40

SiO2

0.10

Fe2o3

0.10

Physical

Cystal System

Hexahedron

Principal   Crystalline   Phase

Al2O3

Color

White

True Density(g/cm3)

3.9

Bulk Density(g/cm3)

1.75-1.95

Mohs Hardness

9

Coefficient of Linear Expansion(1/ degree centigrade )

8.3×10-4

LOI(%)

0.10




Name

Specification

Section Sand

0-1mm 1-3mm 3-5mm 5-8mm 8-10mm

Size Sand

24# 30# 36# 46# 60# 70# 80# 90# 100# 120#

Fine Powder

180-0 200-0 325-0

Chemical Composition

Al2O3

Fe2o3

SiO2

Na2O

LOI

Bulk Density(g/cm3)

Content(%)

99

0.10

0.10

0.40

0.10

3.9



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Q:Pals who know something about fire resistant material please tell me how many types of refractory material there are
Refractory materials used in special applications include high temperature oxcide, such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia and other, refractory compounds, such as carbides, nitrides, borides, silicides and sulfides; high temperature composite materials, mainly contain metal ceramic, high temperature inorganic coatings and fiber reinforced ceramics.
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Domestic experimental electric furnace body is made up of hearth, insulating layer and shell. Sic and high-alumina material are often used in traditional electric furnace under 1300℃ traditional furnace, while corundum material is used in 1600℃. Laboratory furnace of Occident usually uses ceramic fiber tank which is characterized by rapid temperature raising, good accuracy, light weight and small volume. In recent years, domestic Hangzhou blue sky Instrument and Shanghai laboratory equipment all have been produced by experimental furnace with ceramic fiber tank.
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1. fire retardant coating 2. fireproof panel 3. fire proof and sealing material 4. flame resisting decorative materials 5. Green fire prevention materials
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Do you want to know whether the specifications of fireclay bricks and ordinary clay brick are the same?
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At present, only phenolic foam boards can meet requirements. The test temperature can be 2,000 degrees, and there is no molten droplet during the tests and it can maintain integrity. heat conductivity coefficient: 0.03W / (mk), non-combustible, non-toxic, smokeless!
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What is the most famous is that grade A is incombustible thermal insulation material. W W inorganic active wall insulation materials, cement foam insulation board, vitrified micro bead thermal insulation mortar, rock wool board, glass wool board, foam ceramics, etc.

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