Alumina-magnesia spinel for refractories synthesized from natural raw materials

Conference · Mon Mar 01 04:00:00 EST 1993 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:7271706

Moore, R E; Monton, B S ^[1]

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1. Univ. of Missouri, Rolla, MO (United States). Ceramic engineering Dept.

Spinel is proving to be a high quality refractory for specific applications. Synthesis of spinel in this study involved using either diaspore or bauxite in its raw form. The diaspore was obtained from a central Missouri deposit and the bauxites were obtained from China and Guyana. Diaspore and bauxite source materials need to have a low alkali content and a high alumina content in order to produce a stable refractory spinel. The raw materials are ground below 45 microns and combined with hardbured magnesia, also below 45 microns, in appropriate compositions to yield spinel. Dry mixing was used to obtain homogeneous mixtures of the raw materials and magnesia. Compacts of different compositions were fired at 1,600 C prior to the creep testing. Creep analysis was done to determine the load bearing capabilities and refractoriness. X-ray diffraction and microstructural analysis, including point count analysis and cathodoluminescence, was carried out to determine completeness of the reactions and morphologies of the reaction products.

• OSTI ID: 7271706
• Report Number(s): CONF-9303210--
• Conference Information: Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 25:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
58 GEOSCIENCES
580000* -- Geosciences
MATERIALS
MECHANICAL PROPERTIES
MINERALS
OXIDE MINERALS
REFRACTORIES
SPINELS
SYNTHESIS
SYNTHETIC MATERIALS