Alumina Crucible, Alumina Boat

High Purity Alumina Crucible, Alumina Boat, 99.6% Al2O3 Alumina Ceramic Crucible, Ceramic Boat

High purity alumina crucible and boat can withstand very high temperatures under reducing, inert, or high vacuum conditions. They remain good chemical resistance under high temperatures and have excellent wear and abrasion resistance. Alumina crucible, alumina boat can withstand up to 1800℃.

Our high purity alumina (Al2O3 content > 99%) ceramics are purpose-built to perform across a wide range of high-temperature applications. Our high purity alumina shows considerable resistance to chemical attack due to the lack of glassy phases that tend to determine corrosion resistance.


alumina ceramic crucible


●  Alumina purity: 99.6%
●  Color: Ivory
●  Sintering temperature: 1810℃
●  Max. working temperature: 1800℃
●  Sag Temp. Unsupported Tube: 1600℃

Chemical Composition (%) Al2O3 >99.6
SiO2 <0.1
Fe2O3 <0.05
R2O <0.1


Standard size and capacity:

Alumina crucible

Capacity (ml) Specification (mm) Capacity (ml) Specification (mm)
5 Dia20x25x2 250 Dia65x80x3
10 Dia29x33x2.5 280 Dia65x105x3
20 Dia34x38x2.5 300 Dia85x60x3
30 Dia38x44x2.5 320 Dia70x100x3
40 Dia42x45x2.5 400 Dia90x90x4
50 Dia45x48x2.5 450 Dia80x115x3.5
60 Dia47x47x2.5 600 Dia85x130x3.5
70 Dia50x55x2.5 750 Dia91x140x3.5
80 Dia50x56x2.5 800 Dia95x135x4
100 Dia52x60x2.5 900 Dia95x160x5
120 Dia45x120x2.5 950 Dia100x150x4
130 Dia57x66x2.5 1200 Dia120x120x5
150 Dia50x100x2.5 1250 Dia100x200x5
170 Dia50x120x2.5 2000 Dia120x260x5
2500 Dia155x150x5mm


Alumina Boat (semi-circle type or rectangle type )

Capacity (ml) Specification (mm)
15 70x20x15mm
20 65x30x17mm
20 100x12x15mm
150 120x60x25mm
200 100x100x27mm

Other sizes can be produced according to your requirement.

Note: Alumina products are sensitive to thermal shock. Try to warm up the furnace chamber slowly. A heating rate between 150℃~300℃/hour is recommended for the first 1-1.5hours so that the alumina products can be evenly heated to reduce the impact of thermal shock.


See our High-Temperature Furnace:


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