Tabular Alumina is a pure sintered alpha-alumina material with excellent thermal volume stability and thermal shock characteristics such as low open porosity and large crystals with closed spherical pores, which are entrapped upon re-crystallization during rapid sintering. Tabular alumina has extremely high refractoriness, high mechanical strength and abrasion resistance, very good chemical purity, excellent dielectric properties and good resistance against acid and alkali corrosion.