Physics
Scientific paper
Apr 1968
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968pepi....1..164r&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 1, Issue 3, p. 164-168.
Physics
5
Scientific paper
The apparatus described consists essentially of Bridgman anvils which compress a pressure cell containing an internal heating element. The construction and operation of the pressure cell are described in detail. Besides housing a stable heating system, it functions as a pressure intensifier, so that the pressure on the sample is about 60 kb higher than the mean pressure across the anvils. The pressure on the sample is given by the mean press load divided by anvil area, plus an additional term representing the pressure difference between that at the centre of the anvils and the mean pressure. This latter term must be obtained by a separate calibration upon a known phase transition. Problems of calibration are briefly discussed. The apparatus is capable of developing pressures on a sample exceeding 200 kb, simultaneously with temperatures of about 1000 °C. This P, T range makes it very useful for studying phase transformations. A large number of new transformations have been discovered with this apparatus.
Major Alan
Ringwood A. E.
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