Method of quantitatively determining the grain size of substance

Details Method of quantitatively determining the grain size of substance Method of quantitatively determining the grain size of substance

1976-03-18

1977-05-31

Queisser, Richard C.

Measuring and testing

Miscellaneous

73 676, G01N 1502, G01N 2900

Patent

active

040261573

ABSTRACT:
A method of quantitatively determining the grain size of substances comprs introducing ultrasound of two different frequencies and measuring the sonic pressure amplitudes of both frequencies, determining the attenuation coefficients from these measurements for both frequencies and finally calculating the value of a.sub.4.

REFERENCES:
patent: 2949769 (1960-08-01), Heller
patent: 2966057 (1960-12-01), Heller
patent: 3133445 (1964-05-01), Richard
patent: 3220261 (1965-11-01), Kriebel
patent: 3710615 (1973-01-01), Johnson et al.
patent: 3779070 (1973-12-01), Cushman et al.
patent: 3791200 (1974-02-01), Hayre

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