Browse Prior Art Database

Growth Of Single Crystal Oxides From Molten Solution

IP.com Disclosure Number: IPCOM000098069D
Original Publication Date: 1961-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Giess, EA: AUTHOR

Abstract

Flux components lower the melting temperatures of the systems to which they are added. Single crystals are grown by slowly cooling to supersaturate fluxed liquids containing the single crystal constituents.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Growth Of Single Crystal Oxides From Molten Solution

Flux components lower the melting temperatures of the systems to which they are added. Single crystals are grown by slowly cooling to supersaturate fluxed liquids containing the single crystal constituents.

Single crystals of nickel oxide are grown from lead-fluoride fluxed melts. A typical composition is: NiO 20 mol%

PbF(2) 80

Rare-earth garnets are grown from melts fluxed with lead salts. Boric oxide lowers the vaporization losses of these melts to less than one-half weight percent in covered crucibles. A typical composition is: (RE)(2) O(3) 4.6mol%

Fe(2)O(3) 41.4

PbO 45.9

B(2)O(3) 8.1

RE is a rare earth. Crystals grown from rapidly cooled (2 to 5 degrees C/hr) melts of this composition often exhibit dendritic growth patterns. Some of the dendrites are in the form of (110) plates.

A physical means of lowering the vaporization losses of these melts consists of floating a platinum boat on the melt surface during crystal growth. Vaporization losses are diminished by greater than fifty percent.

1