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Chapter II Solution Growth….
method is either evaporating or slow cooling saturated solution. But it is
frequently more practical to use a piece from a natural or a previously grown
crystal or to produce oriented
Figure: 2.7 Grown Seed crystals.
over growth on a seed of similar material. Any fragment of the desired crystal
can serve as a seed. A piece bounded by the natural faces is not always the
most preferable one. The most efficient seed is a plate whose faces are
normal to the most rapid growth direction [46].
2.8 Preparation of the Solution for Crystal Growth
For solution preparation it is necessary to have an accurate solubility
temperature data of the material. The saturated solution is prepared in
accordance with the solubility curve. It is tested for saturation by suspending a
small seed crystal in the solution. The temperature of the solution is slightly
raised above the saturated temperature to dissolve any unwanted nuclei or
any surface damage of seed. The temperature then lowered to the equilibrium
temperature in order to commence the crystal growth. Sintered glass filter of
different pore size are used for solution purification. The clear solution
saturated at the desired temperature is taken in growth vessel is perfectly or
partially closed during crystallization.
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