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Title: RESEARCH AND DEVELOPMENT SERVICES LEADING TO THE CONTROL OF ELECTRICAL PROPERTIES OF MATERIALS FOR HIGH TEMPERATURE RADOMES. Period covered July 1, 1958 to April 30, 1959. Project title: ELECTRICAL AND ELECTRONIC MATERIALS. Task title: ELECTRICAL AND ELECTRONIC INORGANIC MATERIALS

Abstract

Methods are described for the preparation of high purity aluminum oxide (less than 100 ppm of impurities) by the solution of 99.999% Al metal in hydrochloric acid and precipitation with ammonia. After calcining at 1400 deg C, this batch was fabricated into ceramics by firing in air at temperatures up to 1900 deg C. Loss tangents at 500DEC approach taat of sappiure, and the temperature variation of dielectric consit is considerably lower than for high purity commercial aluminas. Defects in alumina ceramics produced by impurities and by interactions with gaseous atmospheres have been studied by measuring the reflectance and thermoluminescence of gamma irradiated specimens. (auth)

Authors:
Publication Date:
Research Org.:
Illinois Inst. of Tech., Chicago. Armour Research Foundation
OSTI Identifier:
4192204
Report Number(s):
WADC-TR-59-300
NSA Number:
NSA-14-006618
DOE Contract Number:  
AF33(616)-5929
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS AND MATERIALS; AIR; ALUMINUM; ALUMINUM OXIDES; AMMONIA; CERAMICS; DECOMPOSITION; DEFECTS; FABRICATION; GAMMA SOURCES; GASES; HEATING; HIGH TEMPERATURE; HYDROCHLORIC ACID; IMPURITIES; INTERACTIONS; IRRADIATION; LEACHING; LUMINESCENCE; MEASURED VALUES; PRECIPITATION; PREPARATION; REFLECTION; SAMPLING; SOLUBILITY; SOLUTIONS; TEMPERATURE; THERMOLUMINESCENCE

Citation Formats

Atlas, L M. RESEARCH AND DEVELOPMENT SERVICES LEADING TO THE CONTROL OF ELECTRICAL PROPERTIES OF MATERIALS FOR HIGH TEMPERATURE RADOMES. Period covered July 1, 1958 to April 30, 1959. Project title: ELECTRICAL AND ELECTRONIC MATERIALS. Task title: ELECTRICAL AND ELECTRONIC INORGANIC MATERIALS. United States: N. p., 1959. Web.
Atlas, L M. RESEARCH AND DEVELOPMENT SERVICES LEADING TO THE CONTROL OF ELECTRICAL PROPERTIES OF MATERIALS FOR HIGH TEMPERATURE RADOMES. Period covered July 1, 1958 to April 30, 1959. Project title: ELECTRICAL AND ELECTRONIC MATERIALS. Task title: ELECTRICAL AND ELECTRONIC INORGANIC MATERIALS. United States.
Atlas, L M. Fri . "RESEARCH AND DEVELOPMENT SERVICES LEADING TO THE CONTROL OF ELECTRICAL PROPERTIES OF MATERIALS FOR HIGH TEMPERATURE RADOMES. Period covered July 1, 1958 to April 30, 1959. Project title: ELECTRICAL AND ELECTRONIC MATERIALS. Task title: ELECTRICAL AND ELECTRONIC INORGANIC MATERIALS". United States.
@article{osti_4192204,
title = {RESEARCH AND DEVELOPMENT SERVICES LEADING TO THE CONTROL OF ELECTRICAL PROPERTIES OF MATERIALS FOR HIGH TEMPERATURE RADOMES. Period covered July 1, 1958 to April 30, 1959. Project title: ELECTRICAL AND ELECTRONIC MATERIALS. Task title: ELECTRICAL AND ELECTRONIC INORGANIC MATERIALS},
author = {Atlas, L M},
abstractNote = {Methods are described for the preparation of high purity aluminum oxide (less than 100 ppm of impurities) by the solution of 99.999% Al metal in hydrochloric acid and precipitation with ammonia. After calcining at 1400 deg C, this batch was fabricated into ceramics by firing in air at temperatures up to 1900 deg C. Loss tangents at 500DEC approach taat of sappiure, and the temperature variation of dielectric consit is considerably lower than for high purity commercial aluminas. Defects in alumina ceramics produced by impurities and by interactions with gaseous atmospheres have been studied by measuring the reflectance and thermoluminescence of gamma irradiated specimens. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4192204}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {5}
}

Technical Report:
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