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Title: Composition and process for making an insulating refractory material

A composition and process for making an insulating refractory material. The composition includes calcined alumina powder, flash activated alumina powder, an organic polymeric binder and a liquid vehicle which is preferably water. Starch or modified starch may also be added. A preferred insulating refractory material made with the composition has a density of about 2.4-2.6 g/cm.sup.3 with reduced thermal conductivity, compared with tabular alumina. Of importance, the formulation has good abrasion resistance and crush strength during intermediate processing (commercial sintering) to attain full strength and refractoriness, good abrasion resistance and crush strength.
Authors:
 [1] ;  [2]
  1. (Murrysville, PA)
  2. (Apollo, PA)
Publication Date:
OSTI Identifier:
871504
Report Number(s):
US 5744412
US patent application 08/644440
DOE Contract Number:
FC07-89ID12903
Resource Type:
Patent
Research Org:
Aluminum Co. of America, Alcoa Center, PA (USA)
Country of Publication:
United States
Language:
English
Subject:
composition; process; insulating; refractory; material; composition; process; insulating; refractory; material; composition; calcined; alumina; powder; flash; activated; alumina; powder; organic; polymeric; binder; liquid; vehicle; preferably; water; starch; modified; starch; added; preferred; insulating; refractory; material; composition; density; 4-2; cm; reduced; thermal; conductivity; compared; tabular; alumina; importance; formulation; abrasion; resistance; crush; strength; intermediate; processing; commercial; sintering; attain; strength; refractoriness; abrasion; resistance; crush; strength; insulating refractory; insulating refractory; insulating refractory; organic polymeric; polymeric binder; reduced thermal; refractory material; refractory material; refractory material; thermal conductivity; organic polymer; abrasion resistance; abrasion resistance; preferably water; liquid vehicle; alumina powder; alumina powder /501/