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白剛玉--White Fused Alumina
    發布時間: 2020-08-31 10:35    

白剛玉--White Fused Alumina

白剛玉--White Fused Alumina

HAITANG ROAD, XUGOU, LIANYUNGANG, JIANGSU, CHINA

TEL:0518-81882600                 FAX:0518-81882600

http://www.florenciahoteles.com/                 e-mail:mikezheng@htsinosky.com

 


Product Specification

Character

White, and turns blue after being burnt

Standard number

GB

                       

Product code: 014100902

Introduction

White fused alumina is a kind of artificial abrasive. 3 oxidation 2 aluminium (Al2O3) content over 99%, and the composition such as containing a small amount of ferric oxide, silicon oxide, white. Product size according to the international standard and national standard production, granularity processing according to user requirement. Gm grain sizes of the F4 ~ F220, its chemical composition depending on the size of the particle size. Outstanding characteristic is little impact resistance, crystal size in the mill processing, particles are spherical particles, the surface dry clean, easy to bond.

White Fused Alumina

Crystal

Trigonal system

True density

3.90 g/cm3

Volume density

3.60g/cm3

Hardness

Mr Spectral hardness

2000 - 2200 Kg/mm2

Moh's hardness

9

Colour

White

Turns dark blue after calcination

Melting point

2250℃

Maximum service Temperature

1900℃

Specific heat(Cal/g. C)

0.2620-90℃)

Coefficient of heat conduction

Room temperature 900℃

(Cal/cm3. sec.℃)

Refractive index

e=1.760 w=1.768(Na line)

Electrical resistivity

30 C 300 C 900 C 1600 C(cm)

10、16、10、13、10、5、10、4

Coefficient of linear expansion

7 - 9*10^-6/K (0 - 1600 C)

Chemical property

Reaction with acid A slight corrosion in aqua regia and hydrofluoric acid

Reaction with alkali Only a reaction with hot alkali solution

Effect of oxidation reduction

Non

 

Chemical compoitions 

Grit

Typical     Value

Fine Powder 

Typical Value

AL2O3 MIN

99

99.5

99

99

SIO2 MAX

0.1

0.05

0.15

0.08

FE2O3 MAX

0.1

0.06

0.15

0.06

K2O+NA2O MAX

0.4

0.3

0.45

0.35

BULK DENSITY

3.6

3.62

 

 

REAL DENSITY

3.92

3.92

3.92

3.93

  

Application

White fused alumina is the most economic grinding material suitable for both dry and wet production technology, and it’s especially suitable for the processing of rough surface. The hardness of this artificial synthetic material with sharp appearance and edges and corners is second only to diamond, and is often used in the occasions where here’s strict requirements on iron pollution. It can cut hard materials, and also can be made into sphere to processes the workpiece with precise size, so as to achieve very low roughness. Its high density, sharp, angular structure make it the most rapid cutting abrasive.
It has good self-sharpening, naisuanjian corrosion, high temperature resistant, thermal state performance is stable. Its hardness is slightly higher than that of brown fused alumina, and its hardness toughness is slightly lower, but it has better purity, good self-sharpening, high grinding ability, low calorific value, high efficiency, good thermal stability, acid and alkali corrosion resistance, and high temperature resistance. Grinding tool made with white corundum sand is suitable for grinding high carbon steel, high speed steel and stainless steel fine-grained abrasives. White corundum sand can also be used for precision casting and the production of advanced refractory brick.





                                          

      Date: Jan 1st, 2014                 Signature:

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