采用日本进口九九氧化铝陶瓷，具有高耐磨性能，内外径配合公差≤1μm本产品设计的结构独特，在长年使用过程中杜绝了陶瓷开裂、断裂现象。

主要性能指标：
材料 99.7氧化铝(α-AL2O3)
硬度 1750HV
烧成温度 1750℃
密度 3.92g/cm3
表面粗糙度 ≤0.1μm

This product, 99% of which alumina ceramics being made of materials imported from Japan, features high wear resistance, with fit tolerance between internal diameter and external diameter being ≤1μm.
With uniquely designed structure, the ceramic is absolutely free of cracking and rupture during its long-year use.

Main speeification requirements:
MATERIAL 99.7 aluminum oxide (α-AL2O3)
VICKERS HARDNESS 1700HV
FIRING TEMPERATURE 1700℃
DENSITY 3.92g/cm3
SURFACE ROUGHNESS ≤0.1μm