Beitrag
Eine vereinfachte Piston-Zylinder-Apparatur hoher Genauigkeit
[A simplified piston-cylinder apparatus of high precision]
Johannes, W.
Neues Jahrbuch für Mineralogie - Monatshefte Jg. 1973 Heft 7-8 (1973), p. 337 - 351
9 Literaturangaben
veröffentlicht: Nov 29, 1973
DOI: 10.1127/njmm/1973/1973/337
ArtNo. ESP156197307003, Preis: 19.00 €
Abstract
A piston-cylinder apparatus of high precision has been developed for pressures up to 30 kb. This apparatus is relatively simple and uses two pistons without a “base plug” and without an end load ram. For details see text and Figs. 1—6. The equilibrium pressure of the albite = jadeite + quartz reaction at 600° C has been determined at 16.2 ± 0.5 kb, see Fig. 8 using NaCl and AgCl as pressure transmitting materials. Experiments have been conducted using cells of various metals and using different pressure transmitting materials. The most important factor reducing friction is a well polished core of WC. A lead foil is not suited to reduce pressure losses. The amount of friction is approximately 0.5 kb with AgCl, 0.9 kb with NaCl, 4 kb with BN, and 5 kb with pyrophyllite as pressure transmitting materials, see Fig. 7.
Schlagworte
High pressure • instrumentation (piston cylinder)