General introduction
The ceramic grinding mechanism are regularly comprised of 95% alumina or steatite. We usually use alumina for making reusable grinding burrs, and steatite for making disposable grinding burrs.
Alumina is a very hard, dense material of exceptional strength. It exhibits resistance to corrosion. Alumina grinders support refilling. In contrast, a steatite grinder has a top that can’t unscrew, so once the pepper is used up, people will throw it away.
Why choose ceramic burr?
Ceramic Vs. Steel Burrs |
Property |
Ceramic |
Stainless Steel |
Carbon Steel |
Corrosion resistance |
★★★ |
★★ |
★ |
Cost advantage |
★★★ |
★★ |
★ |
Sharpness |
★★ |
★ |
★★★ |
Durability |
★★ |
★★★ |
★★★ |
Consistency |
★★ |
★ |
★★★ |
Remark: The better the performance, the more stars. |
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|
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Why choose steatite?
Steatite ceramic is used extensively in the disposable pepper mill, spice mill, or salt grinder. It is a lower-cost material than alumina (Al2O3) but has excellent electrical resistance properties (which are retained at high temperatures), along with moderate mechanical strength.
Mechanical Property |
Ceramic Material |
Steatite
(MgO.SiO2) |
95% Alumina
(Al2O3) |
Density (g/cm3) |
≥2.70 |
≥3.65 |
Water absorption (%) |
0 |
0 |
Hardness (HV) |
800 |
1500 |
Flexural strength (Mpa) |
≥190 |
≥320 |
Compressive strength ( Mpa) |
≥551 |
≥2000 |
Fracture toughness (Mpam1/2) |
– |
3-4 |