Dental furnace and process for operating a dental furnace
AssigneeIvoclar Vivadent AG
InventorsRudolf Jussel, Manuel Schlegel
Life of this patent
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Abstract
The invention relates to a dental furnace, in particular a high-temperature dental furnace for oxide ceramics such as zirconium dioxide having sintering temperatures of between 1300 and 1850° C., comprising a heating element (10) which is intended to give off heating energy to the firing chamber. It is provided that the heating element (10) comprises at least two heating element sections (48, 50) adjoining one another at a transition area (34) which is not current-carrying and/or which extends away laterally, that the transition area (34) is supported on a position, in particular on the free end, spaced apart from the electrical connections (16, 18) on the dental furnace and carries at least the two adjoining parts of heating element sections (48, 50).
Claims21
A dental furnace comprising
- a heating element arrangement (10) which is intended to give off heating energy to the firing chamber,
- wherein the heating element arrangement (10) has at least a first electrical connection (16) and a second electrical connection (18), each at least first and second electrical connections connected to a configuration of current-carrying heating elements,
- wherein the at least first and second electrical connections (16) (18) are supported on the dental furnace outside of the firing chamber,
- wherein the configuration of current-carrying heating elements is adjoined to a transition area element (34) which does not carry a current and/or which extends away from the configuration of current-carrying heating elements.
A process for operating a dental furnace comprising a heating element arrangement (10) which comprises molybdenum disilicide, said process comprising
- subjecting the heating element arrangement (10) to regeneration firing at 1300-1800° C.,
- wherein in the regeneration firing process the dental furnace is brought to an oxidation temperature of the molybdenum disilicide without the placement of dental restoration parts.
Dependencies are inferred from the claim text.