Accession Number:

AD0603029

Title:

MICROMINIATURE CRYSTAL UNITS CR-(X-47)/U.

Descriptive Note:

Quarterly rept. no. 4, 1 Feb-30 Apr 64,

Corporate Author:

GENERAL ELECTRIC CO LYNCHBURG VA

Personal Author(s):

Report Date:

1964-04-30

Pagination or Media Count:

23.0

Abstract:

Modification of the header ceramic seal was necessary to prevent fracture. Ceramic thickness was increased to .030 so that ceramic seal cound withstand the 90 degree lead bend test without fracture. Ceramic diameter was reduced to .185 in order to accommodate more braze material between 52 alloy compression ring and ceramic. Two crystal blank designs at 15 mc. were investigated. The partially contoured design had superior performance to a flat blank design. The effects on two types of conductive epoxy cement on crystal parameters were also investigated. Five electron-beam sealing experiments are described. Weld schedule optimization is being accomplished using cut-and-try techniques. The most significant problem in sealing is ceramic fracture due to use of improper weld schedules. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE