Phase Diagrams vs. Crystal Growth from Liquid Phases

Phase Diagrams vs. Crystal Growth from Liquid Phases [Pg.13]

This section will describe some special problems, violations and handicaps of crystal growth associated with different types of phase diagrams. Growth of bulk crystals from the liquid state plays a dominant role for many technical applications and also in basic research. For this reason, the section is focused on growth processes from the melt, from high-temperature solutions and from aqueous solutions. The variable pressure cannot be neglected, but it is accepted to have Htde influence for many material systems, also at elevated temperature. [Pg.13]

Only one type has the identical composition of the melt and the solid crystalline phase at a congruent melting composition/point. This point corresponds to a distribution coefficient ko = 1. and it is the best condition for growth from a liquid phase. An equilibrium between the solid and liquid phase in aU other cases is characterized by a composition difference and consequently the existence of [Pg.13]

Solid-solution system Congruent melting Incongment melting nonstoich. melt HT - solutions Eutectic system phase transition Tm lowering pressure lowering [Pg.14]

Bridgman method Czochralski method TSSG.THM TSSG,THM [Pg.14]