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US 4,159,891 AGranted
Crucible
AssigneeProlizenz AG
InventorsWalter Schmidt, Franz Sperner, Walter Stahlin
Life of this patent
Estimating the term…
Abstract
A crucible, especially for containing melts, has multi-layered walls with an inner core of heat resistant material. A continuous coating layer of temperature resistant material is supported on the core. The coating layer at least partially defines a reservoir for melts to be contained in the crucible, and is composed of material resistant to attack by hot melts.
Claims16
A crucible for use in heating and retaining melts at elevated temperatures of 1800.degree. C. or above comprising, in combination:
- a circumferential side wall portion;
- a bottom wall portion adapted to form with said circumferential side wall portion a crucible chamber;
- said circumferential side wall portion comprises a support body composed of a refractory metal alloy;
- a continuous coating layer composed of a metal or combination of metals chosen from the group consisting of the platinum metals and completely enveloping said support body;
- and a high-temperature resistant oxide intermediate layer disposed between said support body and said coating layer wherein said intermediate layer prevents diffusion between the coating layer and the support body.
2 more elements
A crucible for use in heating and retaining melts at elevated temperatures comprising, in combination:
- a circumferential side wall portion;
- a bottom wall portion separable from said circumferential side wall portion and adapted to form with said side wall portion a crucible chamber;
- said circumferential side wall portion comprises a support body composed of a refractory metal alloy;
- a continuous coating layer composed of a metal or combination of metals chosen from the group consisting of the platinum metals and completely enveloping said support body;
- and
- a high-temperature resistant oxide intermediate layer disposed between said support body and said coating layer wherein said intermediate layer prevents diffusion between said coating layer and said support body.
3 more elements
Dependencies are inferred from the claim text.