AL-30AAH
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Catalog excerpts

Alumina Type AL-30AAH General Information ZIRCAR Ceramics’ Alumina Type AL-30AAH is a premium-grade refractory structure composed of Polycrystalline Alumina Fiber (PCW) and high-purity inorganic alumina binder. AL-30AAH exhibits the highest Al2O3 purity of ZIRCAR Ceramics’ commercially available products. Its composition is engineered at 98.4% Al2O3 existing predominantly in the alpha crystal phase . As AL-30AAH contains no free silica it is appropriate for use in advanced high-temperature systems such as copper vapor lasers and furnaces with reducing atmospheres - where silica cannot be tolerated. AL-30AAH products are pre-fired to an extremely high temperature which contributes to its outstanding stability and hot strength. AL-30AAH’s uniformly bonded, fine, open-pore structure enables it to be cut and readily machined to close tolerances. AL-30AAH exhibits excellent resistance to chemical attack and is not affected by oil or water. It is, however, affected by hydrofluoric acid, phosphoric acid and strong alkalis. Typical Composition, % ZIRCAR Ceramics, Inc. PO Box 519 Technical Data Bulletin 100 N. Main St., Florida, NY 10921-0519 Alumina Type AL-30AAH E-mail: sales@zircarceramics.com Page 1 of 2

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Alumina Type AL-30AAHCharacteristics & Properties Continued Thermal Conductivity, ** ASTM C177-76 W/m°K (BTU/hr ft2 °F/in) The data presented herein is intended to help the user to determine the appropriateness of this material for their application. This data is a nominal representation of this product's properties and characteristics and therefore should not be used in preparing specifications. * Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences. ** Properties expressed parallel to...

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