Accession Number : AD0282259

Title :   RESEARCH AND DEVELOPMENT ON STANDARDIZATION OF OBJECTIVE TESTS FOR MICA AND MICA-LIKE MATERIALS SUITABLE FOR ELECTRON TUBE SPACERS.

Descriptive Note : Final rept.,

Corporate Author : NAVAL APPLIED SCIENCE LAB BROOKLYN N Y

Personal Author(s) : Pollak,Edward E.

Report Date : 13 AUG 1962

Pagination or Media Count : 14

Abstract : An investigation aimed at developing and standardizing objective tests for mica, and mica-like materials, suitable for use in electron tubes, is completed. It is found that reliable and reproducible tests for the electrical properties, and the gas-content property of these materials are possible. Of all materials tested, synthetic mica is shown to have the lowest gas content. Phlogopite mica is shown, after appropriate heat treatment, to alter its properties in a direction which enhances its value as a tube spacer material. Other properties of mica, and of mica-like materials, such as optical axis and modulus of elasticity, are found to be reproducibly and reliably testable. (Author)

Descriptors :   *MICA, ELASTIC PROPERTIES, ELECTRON TUBES, HEAT TREATMENT, MECHANICAL PROPERTIES, MICA CAPACITORS, OPTICAL ANALYSIS, PHYSICAL PROPERTIES, QUALITY CONTROL, RELIABILITY, STANDARDS, TEST METHODS, THERMAL CONDUCTIVITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE