Accession Number : AD0296534

Title :   DIELECTRIC TO METAL SEAL TECHNOLOGY STUDY

Descriptive Note : Quarterly rept. no. 1,19 Mar-30 Jun 62,

Corporate Author : RADIO CORP OF AMERICA LANCASTER PA INDUSTRIAL TUBE AND SEMICONDUCTOR DIV

Personal Author(s) : BERG,M. ; GRIMM,A.C. ; MARINARO,F.F.

Report Date : JUL 1962

Pagination or Media Count : 60

Abstract : A theoretical and experimental investigation leading to the development of improved dielectric-to-metal seals and sealing techniques for use with output windows for high-power microwave tubes was conducted. Investigation of refractory metal and active metal processes were initiated. The refractory metal processes are being used for synthetic sapphire and beryllium oxide. The active metal processes are being used for fused silica and pyroceram. A comprehensive literature survey was compiled and is included as Appendix A. Various dielectric materials were evaluated for electrical loss and mechanical strength and the optimum materials were selected. Work on compression-band seals was given priority over the metalized sealing techniques because no metalizing is employed in the seal. Other advantages of the compression-band seal are a minimum of radiofrequency loss and its adaptability to different dielectric materials. Several experimental seals were fabricated to learn the factors necessary to produce a practical seal. Although the seals failed, valuable information was accumulated. (Author)

Descriptors :   *ADHESIVES, *DIELECTRICS, *METALS, BERYLLIUM COMPOUNDS, BIBLIOGRAPHIES, BONDING, BORON COMPOUNDS, CERAMIC MATERIALS, ELASTIC PROPERTIES, MANUFACTURING, MECHANICAL PROPERTIES, METAL SEALS, MICROWAVE EQUIPMENT, NITRIDES, OXIDES, REFRACTORY MATERIALS, RUPTURE, SAPPHIRE, SILICON COMPOUNDS, THEORY, THERMAL EXPANSION

Distribution Statement : APPROVED FOR PUBLIC RELEASE