Zirconium Silicate (Zircon) is our standard thermal shock resistant material. It is best applied where high temperatures >1500C or 2700F are not a factor. It generally has a higher density than the alumina ceramics, as well as a slightly lower porosity.
For more demanding applications, refractories containing primarily alumina are more desirable. With a maximum service temperature of 1700C or 3040F, and a porosity of approximately 20%, our 85% alumina is capable of withstanding the more severe environments found in boiler applications.
94% alumina has similar physical properties to the 90% alumina batch, but the greater alumina content permits even more severe applications. This material is often used in boilers where oxygen enrichment is used and is also recommended for applications with any uncertainty or unreliability in operating parameters.
This is a technical ceramic which is completely vitrified to give no open porosity. It has extremely high strength, but should not be used where any temperature fluctuation occurs. It has high stability up to a maximum service temperature of 1925C or 3500F.
Similar to 99% alumina, AMZ has been combined with another ingredient to achieve benefits such as increased abrasion resistance and unusually high thermal shock resistance for a vitreous material. These benefits are gained with only a small sacrifice in service temperature to 1800C or 3272F. A typical application of this material is in FCC air distributor grid nozzles.