Open AccessMEASUREMENT OF SURFACE AREA OF URANIUM DIOXIDE POWDER AND SINTERED PELLETS
Author(s) -
Ted Smith
Publication year - 1960
Language(s) - English
Resource type - Reports
DOI - 10.2172/4123540
Subject(s) - pellets , uranium dioxide , materials science , krypton , reproducibility , particle size , anatase , specific surface area , particle (ecology) , uranium , cubic zirconia , adsorption , sieve (category theory) , scanning electron microscope , analytical chemistry (journal) , titanium dioxide , mineralogy , xenon , chemistry , composite material , chromatography , metallurgy , ceramic , biochemistry , oceanography , organic chemistry , photocatalysis , combinatorics , mathematics , geology , catalysis
The surface areas of sintered uranium dioxide pellets (individual pellets ranging from 50 to 2000 cm/sup 2/) were measured with a precision of 1.3% and a reproducibility of about 4% with a BET adsorption apparatus, using krypton as the adsorbate. Powder samples (10 to 50 mg) of uranium dioxide, anatase, zirconia, and ceria were measured with a precision of 0.5% and a reproducibility of about 3%. An excellent correlation was found between the surface area and the average particle diameter, as measured with a Fisher Sub-Sieve Sizer. An equation, relating the surface area(S) and the average particle diameter(D) (S= 1.67/D, as compared to S = 0.547/D (if the particles were spherical)) shows the powder has a shape factor of about 3. (auth