INTRODUCTION: name of corundum, which comes from India, is a mineralogical name with its hardness nest to diamond. Corundum is mainly used for grinding advanced materials. Corundum jar with zirconia balls .is a best matching way for wear-resistance. Though the corundum has a strong hardness, it is also fragile, please prevent falling to the ground and high strength impact behavior when using it. We can customize various types of vacuum jar according to customer’s needs.

Arc Straight alumina ceramic crucibles’ basic functions:
Name: straight alumina crucibles
Chemical Composition Al2O3 ≥ 99
R2O ≤ 0.2
Fe2O3 ≤ 0.1
SiO2 ≤ 0.2
Volume density (g/cm2) ≥ 3.80
Apparent porosity (%)<1
Bending strength (Mpa)> 350
Compressive strength (Mpa)> 12000
Dielectric constant Σ (1MHz) 2
The highest operation temperature (°C) 1800
Best roast container for making powder TV, rare earth materials, precious metals, and roasting high, medium and low ceramic capacitors, NTC, PTC piezoelectric ceramic and lithium cobalt oxide, lithium manganese oxide powder.

1. High purity: Al2O3> 99%, good chemical corrosion resistance.
2. Good temperature endurance, long-term use at 1600 °C, 1800 °C short-term.
3. Good rapid thermal shock resistance, not easy to burst.
4. Slip Casting with high density.

We can provide all kinds of mill balls like stainless steel balls, zirconia balls, alumina balls, PU balls, steel carbon balls, tungsten balls, agate balls, hard metal balls, silicon nitride balls, high wear resistant steel ball, manganese steel balls, nylon balls, cemented carbide, crystal glass and other special metal materials.