Development of Polycrystalline Spinel for Transparent Armor Applications
NORTH CAROLINA STATE UNIV AT RALEIGH ENGINEERING RESEARCH SERVICES DIV
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The study was undertaken to determine the feasibility of producing substantial quantities of pure, undoped MgAl2O4 spinel powder from a chemical precursor in a semicontinuous process, and thereafter, of densifying the powder by hot molding andor rate controlled sintering processes on a best efforts basis to achieve optical transparency in this isotropic material. The precursor salt was a mixed magnesium aluminum sulphate hydrate produced on a batch basis by direct melting of the starting salts and subsequent solidification by cocrystallization. Partially dehydrated precursor was dynamically precalcined at about 650 deg C, and then dynamically calcined at about 1150 deg C in an inclined rotating tube furnace.
- Ceramics, Refractories and Glass
- Fabrication Metallurgy