In the field of advanced materials, tabular corundum stands out for its excellent physical and thermal properties. It is a high purity sintered alumina widely used in refractory, ceramics and polishing applications.
What is tabular corundum?
Tabular corundum, essentially alpha alumina, is one of the most thermally stable alumina types. It is characterized by high purity, complete crystallization and developed crystallography. This high-density, fully shrunk, coarse-grained alpha alumina is derived from the sintering process in an ultra-high temperature shaft kiln. The name "platey" comes from the flake or plate-like crystals it forms when heated.
What is tabular corundum?
Tabular corundum, essentially alpha alumina, is one of the most thermally stable alumina types. It is characterized by high purity, complete crystallization and developed crystallography. This high-density, fully shrunk, coarse-grained alpha alumina is derived from the sintering process in an ultra-high temperature shaft kiln. The name "platey" comes from the flake or plate-like crystals it forms during heating.
Production process of tabular corundum
Raw material preparation
The production process starts with the careful selection of raw materials. High-purity calcined alumina is used, usually Al2O3 with a purity of more than 99.5%.
Shaping and pre-sintering
Raw alumina is formed into specific shapes and pre-sintered at temperatures around 1000°C to eliminate mechanical stress.
High temperature sintering
The shaped alumina is then sintered in a high-temperature shaft kiln at temperatures above 1900°C, producing high-density, fully shrunk, coarse-grained alpha alumina.
Crushing classification
Sintered corundum is crushed and the grains are separated through a strict classification system to produce high-quality tabular corundum.
Application of tabular corundum
In refractory materials
The main application of tabular alumina is in the manufacture of high-quality refractory materials. Its high refractoriness, high density, low porosity and thermal shock resistance make it an excellent material for furnace linings, kilns, incinerators and reactors.
In the field of ceramics
In ceramics, tabular corundum is used as a raw material due to its hardness, wear resistance, and corrosion resistance.
In the field of abrasives and polishing
The hardness of tabular alumina also makes it an excellent abrasive material. It is used in grinding wheels, sandpaper and other abrasive products. Additionally, it is used in polishing applications to provide a smooth, high-gloss finish.
In conclusion
With its unique properties and wide range of applications, tabular corundum is expected to become an important player in the advanced materials market. As the industry continues to innovate and seek high-performance materials, demand for tabular corundum will further grow. Its expanding role in forming industries, from refractories to ceramics and abrasives, heralds the exciting possibilities for this versatile material.
