Modeling, Simulation and Design of High Pressure Crystal Growth Systems

Period of Performance: 09/30/1994 - 09/29/1995

$100K

Phase 1 STTR

Recipient Firm

Ferrofluidics Corp.
40 Simon Street
Nashua, NH 03061
Principal Investigator
Firm POC

Research Institution

SUNY Stony Brook
The Department of Computer Science
Stony Brook, NY 11794
Institution POC

Research Topics

Abstract

Indium phosphide (InP) is an import substrate material for light-wave communications, opto-electronics, and radiation-resistant solar cells. Its broad use has, however, been limited because of the cost of growing InP crystals by the present two-step method and the problem of twinning and disolocations. An innovative "one-step" in situ synthesis and magnetically-stablized liquid-encapsulated Kyropoulos (MLEK) growth process, that is being developed at Rome Laboratory can bring major advancements in this field. A joint industry/university/laboratory research program of modeling, code development, simulation, design and experiments is proposed to transfer this DoD technology for commercialization. A high resolution computer model based on multizone adaptive grid generation and curvilinear finite volume discretization will be developed to simulate 3D transport processes in an irregular domain with moving boundaries and interfaces. The model will help in developing a basic understanding of heat transfer, fluid flow, species transport and chemical reaction associated with high pressure crystal growth (HPCG) as well as in optimization and control of the process. Valuable information on thermophysical properties and pressure-versus-composition relationship will be obtained from experiments. Critical issues that must be resolved for the success of this process will be identified and modifications in the existing HPCG system at Rome Laboratory will be suggested. Design of an advanced HPCG furnace for large diameter, high quality crystals that may use Ferrofluidics proprietary/patented crystal growth technologies and a fully automatic control strategy will be subsequently developed.