Viscosity measuring system

Details Viscosity measuring system Viscosity measuring system

1977-04-26

1978-09-12

Evans, F. L.

Optics: measuring and testing

Oil testing

356 85, 250459, 73 64, G01N 3328

Patent

active

041133846

ABSTRACT:
A method for measuring the viscosity of a lubricant fluid under very high pressures by placing a sample of lubricant containing one or more ruby crystals (.about.10.mu.m diameter) in a diamond anvil cell illuminated with a point source of visible light radiation, and observing by means of appropriate optics the rate of change of band width of the ruby emission spectra at given temperatures and pressures as a measure of the viscosity of the fluid.

REFERENCES:
patent: 3526127 (1970-09-01), Sarkis
patent: 4009962 (1977-01-01), Lauer et al.
Hawke et al., Review of Scientific Instruments, vol. 45, No. 12, Dec. 1974, pp. 1958-1601.
Weinstein et al. Physical Review B (Solid State), vol. 12, No. 4, Aug. 1975, pp. 1172-1186.

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