Accession Number:

AD0653990

Title:

REMOVAL OF LIQUID INCLUSIONS FROM SOLUTION-GROWN CRYSTALS,

Descriptive Note:

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LABS DIV

Personal Author(s):

• Wilcox,William R.

Report Date:

1967-04-01

Pagination or Media Count:

29.0

Abstract:

Inclusions are almost invariably present in solution-grown crystals and chemicals. It is shown that a temperature gradient is a practical means of removing the liquid inclusions found in many crystals. Theoretical calculations of travel rates and energies were performed for several materials. The technique was tested experimentally, using several aqueous-grown crystals. Occasionally, inclusions were observed to exit from the cooler, top surface of the crystals, in disagreement with theoretical predictions. This unexpected behavior is probably due to a reflux-extraction mechanism in those inclusions containing both vapor and liquid. Other means of removing inclusions are discussed briefly. Author

Descriptors:

• (*CRYSTALS
• DEFECTS(MATERIALS))
• (*PURIFICATION
• CRYSTALS)
• SEPARATION
• DRYING
• DIFFUSION
• LIQUIDS
• TEMPERATURE

Subject Categories:

• Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE