Melting skull

Skull Melting. Skull melting, or the cold cmcible technique, is used for high melting point materials. Zirconia [1314-23 ] has such a... [Pg.215]

Fig. 2. Schematic drawing of one form of skull-melting apparatus only some of the fingers are shown (2). RF = radio frequency.

Cubic Zirconia. As of this writing, cubic zirconia [1314-23-4], Zr02, is the best diamond imitation available (Table 3). It is marketed under such names as CZ, Cerene, Cubic zirconium, Diamonair II, Diamonique III, Fianite, etc, and grown by the skull melting technique (2,5,13). Pure Zr02 is... [Pg.217]

Crystal Growth from Melts and Solutions 17.2.4.1. Growth from Melts 17.2.4.1.6. Skull Melting. [Pg.119]

An alternative method for growing crystals of reactive high-melting materials is the skull melting technique in which the molten charge is surrounded by powder of the same... [Pg.119]

Figure 1. (a) Small-scale arrangement used for skull melting, showing distribution of crystals after cooling, (b) Small Crystal of cubic zirconia grown by skull melting. (Courtesy of J. F. Wenckus, Ceres Corporation.)... [Pg.119]

Figure 2. Skull melting furnace positioned for (a) tilt pouring (top) and (b) centrifugal casting. (After Ref. 1.)...

Single Crystal Growth of Oxides by Skull Melting The Case of Magnetite 43... [Pg.43]

SINGLE CRYSTAL GROWTH OF OXIDES BY SKULL MELTING THE CASE OF MAGNETITE (Fe304)... [Pg.43]

The technique and past history of skull melting has been described in several articles from this and other laboratories.12-19 Basically, radio frequency power from a commercial power supply (50 KW at 3-5 MHz) is transferred to a work coil tightly wrapped about a skull crucible consisting of a set of cold fingers that... [Pg.43]

Fig. 2. A schematic diagram of the skull melting apparatus. Not shown are protective screens around the vacuum cylinders, a transparent fused silica sleeve between the skull crucible and the r.f work coil, and a fume hood above the apparatus. (1) Skull crucible (2) work coil (3) to r.f. generator (4) 12-port vacuum collar (J) vacuum quick-connect coupling (6) Teflon insulating flange (7) water supply (in and out) for crucible (S) motor-driven gear system for lowering crucible (9) base plate and supporting frame, (10) 45.7-cm diameter X 30.5 cm high Pyrex vacuum cylinders (11) aluminum top plate (12) to mechanical pump.

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