Vacuum Levitation Melting

Abstract

Application of acoustic levitation to the investigation of melting and freezing phenomena J. Acoust. Soc. Am. 79, S4 (1986); 10.1121/1.2023259Containerless melting and solidification of materials with an aerodynamic levitation system Rev. Sci. Instrum. 53, 851 (1982);

Thermal diffusion in kinetic and equilibrium measurements by levitation technique

“…The forward flux and reverse flux in the other steps are both extreme ly large. For pr~ctical purposes , eq ua tions (5.5), (5,6) and (5,8) are approxi mated: 128 Simultaneous solution fo r each e-term is performed, followed by substi t ution in equation (5,3), which becomes: · k! .k 3 .k 5 ,k 7 .xH 2 Si -k 2 , k 4 .k6,k 8 ,aSi .xH 2 i Flux = --------------------------------------------------k3.k6,k7.aSi+k3,k5.k8,xH2i+k4.k6.k8,xH2i' If the ove ral I ra t e of tra ns fe r is control led by th e rate of the c hem ical reaction, a similar argumen t to that for the adso r ptio n step above may be appli e d, Equation (5,5) Evaluate the 6 1 s and substitute in the equation for the flux, C.kg,k 1 ,k 3 ,k 5 .k 7 ,xH 2 S 00 -C,kg.k 2 .k 4 .k 6 ,k 8 ,a 500 ,xH 2 oo If the resistance is high in the gas or I iquid phase, the same argume nt applied in Appendix 2 may be employed in the i~termediate steps.…”

Phase Separation and Solid Solution in Nonstoichiometric and Stoichiometric (Sr, Mg)TiO3 Ceramics

“…By adjustment of the ring relative to the coil the liquid metal can be stabilized and steered to any desired position in the system. Many systems have been reported for the levitation of liquid metals in high frequency fields (Okress et al 1952, Polonis et al 1954, Comenetz and Salatka 1958, Harris and Jenkins 1959, Weisberg 1959, Begley et al 1959. These generally consist of a levitating coil in the form of a truncated cone tapering downwards, surmounted by one or more reversed turns in series with the levitating coil.…”