In the world of advanced materials, Tabular Alumina stands out due to its exceptional physical and thermal properties. It’s a high-purity sintered alumina extensively used in refractory, セラミック, および研磨用途.
What is Tabular Alumina?
板状アルミナ, essentially alpha alumina, is one of the most thermally stable types of alumina. It’s characterized by its high purity, complete crystallization, and well-developed crystallography. This high-density, fully shrunk, coarse crystalline alpha alumina is derived from the sintering process in an ultra-high temperature shaft kiln. The name ‘tabular’ is derived from its tablet-like, or tabular, crystals formed during the heating process.
Unique Characteristics of Tabular Alumina
Tabular Alumina is known for its:
- High Refractoriness: It exhibits exceptional resistance to high temperatures and chemical reactions.
- 高密度: これにより、耐摩耗性と耐衝撃性が向上します, 多くの産業用途に最適な選択肢です.
- 低気孔率: 気孔率が低いため、スラグの浸透が最小限に抑えられます。, 金属, そしてガス.
- 耐熱衝撃性: 結晶サイズが大きく、気孔が閉じているため、優れた耐熱衝撃性が得られます。.
板状アルミナの製造工程
原料の準備
製造工程は原材料の慎重な選択から始まります. 高純度焼成アルミナを使用, 通常は以上の純度を持っています 99.5% Al2O3.
成形と仮焼結
生のアルミナは特定の形状に成形され、機械的ストレスを除去するために約 1000°C の温度で予備焼結されます。.
高温焼結
成形されたアルミナはその後、1900°C 以上の高温シャフトキルンで焼結されます。, 結果として高密度が得られます, 完全に縮んだ, 粗結晶アルファアルミナ.
粉砕と選別
焼結したアルミナを粉砕する, 粒子は厳格なグレーディングシステムによって選別され、高品質の板状アルミナが生産されます。.
板状アルミナの用途
In Refractory Materials
The primary application of Tabular Alumina is in the manufacture of high-quality refractory materials. Its high refractoriness, 高密度, low porosity, and resistance to thermal shock make it an excellent material for lining furnaces, 窯, incinerators, and reactors.
In Ceramics
In ceramics, Tabular Alumina is used as a raw material due to its hardness and resistance to wear and corrosion.
In Abrasives and Polishing
The hardness of Tabular Alumina also makes it an excellent material for abrasives. It’s used in grinding wheels, サンドペーパー, およびその他の研磨製品. 加えて, it’s used for polishing applications, where it provides a smooth, high-gloss finish.
結論
板状アルミナ, with its unique characteristics and wide range of applications, is poised to be a significant player in the advanced materials market. As industries continue to innovate and seek high-performance materials, the demand for Tabular Alumina is set to rise further. Its role in shaping industries, from refractories to ceramics and abrasives, continues to expand, heralding exciting possibilities for this versatile material.
