ULTRAHIGH PRESSURE TECHNOLOGY
A general discussion is presented on the current status and possible applications of high-pressure research. Highpressure apparatuses are discussed at length, including those of P. W. Bridgman and the tetrahedral anvil used for the synthesis of diamond and Borazon. A new "girdle" die design was presented for use at high pressures and high temperatures; it has reached pressures of over 1.3 x 10/sup 5/ atm in preliminary tests. The applications of pressure were treated with reference to the synthesis and the properties of substances. A new form of sodium silicate, coesite, was prepared along with a number of naturally occurring minerals. Applications of pressure in the synthesis of reactor materials and fuel elements were considered. It was found that UO/sub 2/, which is unstable at high temperatures in an oxidizing atmosphere, could be transformed into a stable material for reactor use as a ceramic body by incorporating Sc/sub 2/O/sub 3/ in it under pressure. A new modification of U/sub 3/O/sub was obtained under pressure. The effects of pressure on properties, e.g., conductivity, x-ray diffraction, and nuclear magnetic resonance were discussed, and it was concluded that much more data were needed on this topic for a better understanding of the nature of the solid state. (D.L.C.)
- Research Organization:
- Battelle Memorial Inst., Columbus, Ohio
- NSA Number:
- NSA-14-023237
- OSTI ID:
- 4163549
- Journal Information:
- Chem. Eng. Progr., Vol. Vol: 56, No. 8; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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