Preparation of Samples for X-Ray Powder Diffractometry Using a Hydrophobic Amorphous Silica.
EDGEWOOD ARSENAL MD
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A novel procedure for preparing powder samples for use in an x-ray powder diffractometer has been developed. The crystalline material is ground in the presence of a hydrophobic silica aerogel and then pressed into pellets at 10,000 psi. The advantages of this procedure are The silica aerogel functions as a grinding aid, improving the grinding of the material The powder is relatively hydrophobic and not easily affected by atmospheric moisture and The pellet formed is very flat and has a high density of randomly oriented crystallites per unit area. Author
- Test Facilities, Equipment and Methods