General Method for Dispersing and Disaggregating Particulate Samples for Quantitative SEM and Optical Microscope Studies.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB
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The eutectic composition of 60 wt camphor and 40 wt naphthalene C-N was found to be an ideal medium for preparation of uniform dispersions of a variety of inorganic materials. Particular advantages to the medium include A melting point of 32C allowing easy storing and handling The solid rapidly sublimes completely in vacuum leaving no residue to interfere with microscopic observations The C-N is unreactive with most inorganic powders In its solid form the C-N is a gently abrasive medium for mechanically breaking down agglomerates and light aggregates The viscosity of the C-N liquid near the melting point is enough to prevent most materials from fractionating by sedimentation during normal handling times. So far this technique has been found quite satisfactory for dispersing powder samples of alumina, portland cement, tungsten, coal mine dust, bariumtitanate, and rutile. Author
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