1800 Alumina ceramic Rectangular crucible(100*40*20mm)

1800 Alumina ceramic  Rectangular crucible

1.Length×width×height= 100×40×20mmght =

2. Long time working temperature= 1600--1800C

3. Short time working temperature= 1820C

4. Temperature chang rate not over 50C/min

5.Applyed in Muffle furnace for Sintering

9.7 alumina boat Rectangular crucibles 
High purity alumina (Al2O3 content > 99%) ceramics are ideal for high temperature applications. Re-crystallised alumina is used in crucibles as it offers the best thermal shock resistance due to the larger grain size (up to 200m m is advantageous) 

Chemical component 
Al2O3≥99 
R2O≤0.2 
Fe2O3≤0.1 
SiO2≤0.2 
Vol.density(g/cm2) ≥3.80 
Apparent Porosity(%)<1 
Bending Strength (Mpa)>350 
Compression strength (Mpa)>12000 
Permittivity ∑(1MHz)2 
The max.operating temperature 1800 
Specification: 5ml 10ml 15ml 20ml 25ml 30ml 50ml 100ml 150ml 200ml-2500ml  
Points: 
High alumina purity:al2o3>99%,good corrosion resistance. 
High temperature resistance,1600C in long use,1800C in short use. 
Good thermal shock,no easy to crack. 
High slip casting density 
Purpose 
Main purpose of crucible and sagger is as a container for analysis and firing of material and product applied in various industries. For example: analysis of coal, melting of the metal, analysis and firing of chemical raw materials, analysis and melting of glass, analysis and firing of rare earth materials and mineral,firing of hightemperature items such as ceramic products and melting of single-crystal raw materials. 

Use Under normal circumstances,firstly put the items which need to be analyzed and fired into the crucible or sagger.Then heat. The speed of heating and drop in temperature are according to the characteristics of equipment and products, fast or slow.Because of the thermal expansion of raw material which the crucibles and saggers are made of, too quick heating or cooling will easily lead to cracking of the crucibles and saggers.The best way is slowing down,which can prolong the life of them.

For inquirys, please indicate W H BL