Journal of Research of the National Bureau of Standards Section A Physics and Chemistry · 1963 · 45 citations · 3 references
Natural SciencesMaterials EngineeringMaterials ScienceCondensed Matter PhysicsInorganic ChemistryPhysical ChemistryPhase DiagramsPhase EquilibriaPhase EquilibriumPhase RelationsPhase TransitionsThermodynamics Of Phase EquilibriaEquilibrium Phase DiagramsHigh-temperature Phase RelationsMelt ThermodynamicsMeltingPhase Diagrams Of Ceramic SystemsQuenchingSolid-solution ThermodynamicsTemperature Effects On Phase Behavior
The phase equilibrium di agram was determined for the Sc203-Ga20 3 system. A quenching furna ce, wound with 60 p ercent Pt-40 percent Rh wire, was emp loyed for experiments conducted at temperatures up to 1,800 C. An induction furnace , having an iridium crucible susceptor, was used to obtain higher temperatures. Temperatures in the quenching furnac e were measured with both a n optical pyrometer and a 95 p ercent Pt -5 percent Rh v ersus 80 percent Pt-20 percent Rh thermocouple. The melt ing point of Ga 20 3 was determined as 1,795 15 C. Experiments at temperatures as high as 2,405 C failed t o melt 8C20 3.
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