Method for producing ceramic powders utilizing gas-displacing or gas-generating additives
OwnerKarl-Hermann Frieseinventor
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Abstract
A method is described for producing a ceramic powder, in which at least one ceramic base powder or ceramic slurry is subject to a heat treatment for generating an intermediate product from which the ceramic powder is produced. The ceramic base powder, the ceramic slurry, or an optionally added additive is transformed in the heat treatment such that gas components are essentially avoided in the ceramic powder or such that gases released from the ceramic base powder or from the ceramic slurry adjust a partial pressure in the ceramic powder.
Claims22
A method for producing a ceramic powder, comprising the steps of:
- adding at least one additive to a ceramic base mixture, the mixture including one of a ceramic slurry and at least one ceramic base powder;
- rinsing the base mixture, before or during the heat treating, using one of a gas essentially free of nitrogen, a gas mixture essentially free of nitrogen, a nitrogen-free gas and a nitrogen-free mixture;
- heat treating the base mixture, wherein the base mixture is transformed into an intermediate product such that at least one result occurs selected from the group of results consisting of (A) gas components are substantially avoided in the intermediate product and (B) gases released by the at least one additive adjust a partial pressure in the intermediate product;
- and
- processing the intermediate product to form the ceramic powder.
A method for manufacturing a planar, ceramic sensor element, comprising the steps of:
- adding at least one additive to a ceramic base mixture, the mixture including one of a ceramic slurry and at least one ceramic base powder;
- rinsing the base mixture, before or during the heat treating, using one of a gas essentially free of nitrogen, a gas mixture essentially free of nitrogen, a nitrogen-free gas and a nitrogen-free mixture;
- heat treating the base mixture, wherein the base mixture is transformed into an intermediate product such that at least one of the following results occurs selected from the group of results consisting of (A) gas components are essentially avoided in the intermediate product and (B) gases released by the at least one additive adjust a partial pressure in the intermediate product;
- and
- constructing the planar, ceramic sensor element with the intermediate product.
Dependencies are inferred from the claim text.