Compressions of Si, MgO, and ZrSiO4 to 8 GPa as measured with a WC-anvil X-ray apparatus and epoxy pressure medium

Singh, AK and Kennedy, GC (1977) Compressions of Si, MgO, and ZrSiO4 to 8 GPa as measured with a WC-anvil X-ray apparatus and epoxy pressure medium. Journal of Applied Physics, 48 (8). pp. 3362-3367. ISSN 0021-8979

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Abstract

A tungsten-carbide opposed-anvil X-ray apparatus with a boron-epoxy gasket and epoxy as a pressure-transmitting medium was used to study the compressions of three materials of high shear strength, silicon, magnesium oxide and zircon. The bulk modulus and its pressure derivative for silicon and magnesium oxide were obtained by fitting a second-degree polynomial to the X-ray data; for zircon, the bulk modulus was determined by fitting data to a linear relation. Bulk moduli were found to be 99.4 plus or minus 8 GPa (silicon), 166 plus or minus 10 GPa (magnesium oxide), and 222 plus or minus 20 GPa (zircon). These values are in good agreement with those obtained using ultrasonic techniques. It is concluded that the use of epoxy as the pressure-transmitting medium is responsible for reducing the magnitude of the uniaxial stress component and improving the sample-pressure distribution

Item Type: Article
Uncontrolled Keywords: Compressibilty;High pressure;Magnesium oxides;Silicon;X ray apparatus;Zirconium oxides;Epoxy resins;Modulus of elasticity;Pressure measurement;Tungsten carbides
Subjects: CHEMISTRY AND MATERIALS > Nonmetallic Materials
Depositing User: Users 11 not found.
Date Deposited: 04 May 2006
Last Modified: 24 May 2010 04:10
URI: http://nal-ir.nal.res.in/id/eprint/1194

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