The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1987
Filed:
Aug. 25, 1986
Thomas Betz, Wiehl-Bielstein, DE;
Hans-Georg von Schnering, Aidlingen, DE;
Erich Schonherr, Leonberg, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
.beta.-zinc diphosphide monocrystals (.beta.-ZnP.sub.2) (whiskers) having a diameter of at least 7 mm are made. To this end, a quartz ampoule is filled up to 70-90% its volume with polycrystalline .beta.-ZnP.sub.2 ; the ampoule is sealed and drawn in upright position at a velocity of 0.5-2.5 mm/day during a period of 24-120 days through a kiln; the temperature outline from below to above in the kiln is defined by a lower inlet temperature of 580.degree.-780.degree. C., a mean maximum temperature of 800.degree.-950.degree. C. and an upper outlet temperature of 350.degree.-400.degree. C.; the ampoule coming from the furnace is crushed and .beta.-ZnP.sub.2 condensed into a monocrystal via the gas phase by sublimation into the upper ampoule portion is removed.