Accession Number : AD0838843

Title :   SPECTROGRAPHIC DETERMINATION OF IMPURITIES IN GALLIUM ARSENIDE (SPEKTROGRAFICZNE OZNACZANIE ZANIECZYSZCZEN W ARSENKU GALU),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Laszkiewicz, Ewa

Report Date : 18 SEP 1967

Pagination or Media Count : 18

Abstract : A method for determining Pb, Al, Cu, Zn, Si, Tl, and Fe in gallium arsenide is described. The gallium from one sample dissolved in an HCl-HNO3 mixture is extracted with isobutyl acetate. The Pb, Al, Cu, and Zn are adsorbed in a column using Dowex-50 cationite. The arsenic in the form of arsenate passes through the column together with the solution. The cations eluted from the column are enriched with graphite powder and determined spectrographically. The Si, Tl, and Fe from a sample not enriched with graphite power are also determined spectrographically. This method permits the analysis of gallium arsenide for semiconductors with a relative error of 12-34% for a sample of 1.5 grams. (Author)

Descriptors :   (*SEMICONDUCTORS, IMPURITIES), (*GALLIUM ARSENIDES, SPECTROPHOTOMETERS), SOLVENT EXTRACTION, QUANTITATIVE ANALYSIS, HYDROCHLORIC ACID, ARSENIC, NITRIC ACID, ACETATES, LEAD(METAL), ALUMINUM, COPPER, ZINC, SILICON, IRON, TELLURIUM, GRAPHITE, POLAND.

Subject Categories : Physical Chemistry
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE