Sintered zircon material for forming block

Patent metadata

Field	Value
Publication number	US-10308556-B2
Application number	US-201715726886-A
Country	US
Kind code	B2
Filing date	Oct 6, 2017
Priority date	Mar 31, 2014
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A refractory object may include a zircon body that may include at least about 0.1 wt. % and not greater than about 5.5 wt. % of an Al2O3 containing component for a total weight of the zircon body. The zircon body may further include at least about 25 wt. % and not greater than about 35 wt. % of a SiO2 component for a total weight of the zircon body.

First claim

What is claimed is:

1. A refractory object comprising:
a zircon body, wherein the zircon body comprises:
at least 25 wt. % and not greater than 35 wt. % of SiO 2 component for a total weight of the zircon body;
a Al 2 O 3 component not greater than 4.5 wt. % for a total weight of the zircon body; and
Yb 2 O 3 at a content of at least 0.1 wt % for a total weight of the zircon body.

2. The refractory object of claim 1 , wherein the zircon body comprises a content of zircon of at least about 50 wt. % for a total weight of the zircon body.

3. The refractory object of claim 1 , wherein the zircon body comprises not greater than about 5.0 wt. % of Yb 2 O 3 for a total weight of the zircon body.

4. The refractory object of claim 1 , wherein the zircon body comprises a creep deformation rate of not greater than about 4.0 E−5 h −1 as measured using a three point bend test at a temperature of 1300° C. and a stress of 2 MPa.

5. The refractory object of claim 1 , wherein the zircon body comprises a creep deformation rate of not greater than about 2.6 E−5 h −1 as measured using a four point bend test at a temperature of 1325° C. and a stress of 2 MPa.

6. The refractory object of claim 1 , wherein the zircon body has a density of not greater than about 4.5 g/cm 3 .

7. The refractory object of claim 1 , wherein the zircon body comprises an apparent porosity of not greater than about 15 vol. % for a total volume of the zircon body.

8. A refractory object comprising:
a zircon body, wherein the zircon body comprises:
at least 25 wt. % and not greater than 35 wt. % of SiO 2 component for a total weight of the zircon body;
a Yb 2 O 3 at a content of at least 0.1 wt % for a total weight of the zircon body; and
a ratio CB Yb2O3 /CB SiO2 of at least about 0.005, where CB Yb2O3 represents a content of the Yb 2 O 3 component in wt. % for a total weight of the zircon body and CB SiO2 represents a content of SiO 2 containing component in wt. % for a total weight of the zircon body.

9. The refractory object of claim 8 , wherein the zircon body comprises a content of zircon of at least about 50 wt. % for a total weight of the zircon body.

10. The refractory object of claim 8 , wherein the ratio CB Yb2O3 /CB SiO2 is not greater than 0.5.

11. The refractory object of claim 8 , wherein the zircon body comprises a creep deformation rate of not greater than about 4.0 E−5 h −1 as measured using a three point bend test at a temperature of 1300° C. and a stress of 2 MPa.

12. The refractory object of claim 8 , wherein the zircon body comprises a creep deformation rate of not greater than about 2.6 E−5 h −1 as measured using a four point bend test at a temperature of 1325° C. and a stress of 2 MPa.

13. The refractory object of claim 8 , wherein the zircon body has a density of not greater than about 4.5 g/cm 3 .

14. The refractory object of claim 8 , wherein the zircon body comprises an apparent porosity of not greater than about 15 vol. % for a total volume of the zircon body.

Assignees

• Saint Gobain Ceramics

Inventors

• Fourcade Julien P
• Lechevalier David J
• Citti Olivier

Classifications

• C04B2235/96

  Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance · CPC title

• C04B2235/3463

  Alumino-silicates other than clay, e.g. mullite · CPC title

• C04B2235/3217

  Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina · CPC title

• C04B2235/3418

  Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title

• C04B2235/3208

  Calcium oxide or oxide-forming salts thereof, e.g. lime · CPC title