|
M. N. Danchevskaya, Yu. D. Ivakin, O. G. Ovchinnikova
Features of Physico-chemical
Properties of Corundum Doped by Chrome under Supercritical Conditions
Abstract
The mechanical and optical properties of
fine-crystalline corundum doped by chrome in a supercritical water fluid at 400
– 410°C (Pн2o= 26-29 MPa)
are investigated. It was established, that the introduction of chrome in
structure of corundum during its synthesis changes the size, habitus and
properties of crystals. At the content of chrome in corundum in the field of
0.1 mas. % the optimization of its properties is observed: the size of crystals
is incremented, their hardness will increase, the intensity of a red
luminescence amplifies. At major concentrations of chrome the performance of
corundum are worsened. The low-temperature doping of corundum during its
synthesis allows to gain well edged crystals by the size up to 500 microns with
chrome, uniformly distributed on volume, with the high mechanical and optical
performances.
Copyright (C) Chemistry Dept., Moscow State University, 2002
|
|
