DEVELOPMENT OF HYDROTHERMAL METHOD FOR GROWING LARGE, HIGH PURITY SINGLE CRYSTALS OF BERYLLIUM OXIDE, AND INITIATE RESEARCH ON GROWING SINGLE CRYSTALS OF KTN AND CHRYSOBERYL.
Abstract
Hydrothermal growth studies of BeO in 4N-KOH solution were continued. When (00.1) oriented seeds are used the (10,0) faces which formed were well developed, but the resultant crystal had many inclusions and defects. The (10.1) cut seeds tend to give crystals of better quality. The crystals grown are being evaluated for purity by emission spectroscopy and the electron microprobe. The survey of possible hydrothermal solvents for the growth of KTN was continued, and KOH and K2CO3 solutions show good promise. Crystals measuring 1-2 mm have been grown from the former, in the temperature range 440-700 C at 15,000 psi, but they were not of the desired composition and were anisotropic. Work has been started on the hydrothermal growth of chrysoberyl.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1966
- Accession Number
- AD0482430
Entities
People
- R. I. Harker
- V. G. Hill