This article is cited in 1 paper

Experimental Instruments and Methods

Stability of the crystal-melt system in the growing of large lithium niobate crystals by the low melt level Czochralski technique

P. V. Smirnov, A. A. Rusanov

Ioffe Institute, St. Petersburg

Abstract: The Lyapunov stability of the crystal-melt system and the solidification rate is studied for the growing of lithium niobate crystals by the low melt level Czochralski technique. The relaxation time is calculated as a function of growth conditions. The curves of transient processes are plotted at various variable perturbations. It is shown that, for optically homogeneous crystals to be produced, the stability of the solidification rate rather than the crystal-melt system as a whole should be ensured. The stability of the solidification rate is found to be maximal at the maximum temperature gradient at the solidification interface and the minimum melt level in a crucible.

Received: 24.10.2009
Accepted: 15.02.2010

 English version: Technical Physics, 2010, 55:11, 1669–1679

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