Chromium oxide refractory object and methods of forming thereof
AssigneeSaint-Gobain Ceramics & Plastics, Inc.
InventorsDarren ROGERS, Damien Bolore, Olivier Citti, Bola Yoon, Kristen E. Pappacena
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Abstract
A refractory object may include a body including a ceramic material and a total porosity of at most 30 vol % for a total volume of the body. The body may include at most 16 vol % of open porosity for the total volume of the body or permeability of less than 9.6 mD. The body may have Modulus of Rupture (MOR) of at least 20 MPa, a thermal shock resistance of at least 6 cycles, or a combination thereof.
Claims20
A refractory article, comprising a body comprising:
- a ceramic material including an oxide;
- and
- a total porosity of at most 30 vol % for a total volume of the body, wherein pores having a diameter of at least 200 microns is at most 30% of the total porosity;
- and
- at least one of closed porosity of at least 8% of the total porosity (vol %) and permeability of less than 9.6 mD,
- wherein the body further comprises:
- Modulus of Rupture (MOR) of at least 20 MPa;
- a thermal shock resistance of at least 6 cycles;
- or
- any combination thereof.
A refractory article, comprising a body comprising:
- a ceramic material including an oxide;
- a total porosity of at most 30 vol % for a total volume of the body, wherein closed porosity are at least 8% of the total porosity;
- and
- at least one of a relative density of at least 78% and open porosity of at most 16 vol % for a total volume of the body,
- wherein the body further comprises:
- Modulus of Rupture (MOR) of at least 20 MPa;
- a thermal shock resistance of at least 6 cycles;
- or
- any combination thereof.
A process for forming a refractory article, comprising:
- forming a mixture including an inorganic material including one or more metal oxides, wherein the mixture comprises a solid loading of the inorganic material at least 67 vol % and less than 75 vol % for a total volume of the mixture;
- and
- forming a green body including a plurality of layers from the mixture, wherein forming comprises moving the mixture through a barrel containing a screw having an L/D ratio of greater than 8, a compression ratio greater than 1, or any combination thereof.
Dependencies are inferred from the claim text.