Composition for producing a shaped refractory ceramic product, a method for producing a shaped refractory ceramic product, and a shaped refractory ceramic product

Patent metadata

Field	Value
Publication number	US-2017022114-A1
Application number	US-201515107345-A
Country	US
Kind code	A1
Filing date	Jan 20, 2015
Priority date	Apr 3, 2014
Publication date	Jan 26, 2017
Grant date	—

Abstract

The invention relates to a composition (batch) for producing a shaped refractory ceramic product, a method for producing a shaped refractory ceramic product, and a shaped refractory ceramic product.

First claim

1 . A composition for producing a shaped refractory ceramic product comprising:
85 to 99% by mass Y 2 O 3 ; and 1 to 15% by mass ZrSiO 4 ; relative to the total mass of the composition in each case.

2 . The composition according to claim 1 , in which the Y 2 O 3 present has a grain size smaller than 4.0 mm.

3 . The composition according to claim 1 , in which the ZrSiO 4 present has a grain size smaller than 1.0 mm.

4 . The composition according to claim 1 , which contains at least one of the following oxides or the sum of oxides in the maximum proportions indicated in each case:
TiO 2 ≦0.15% by mass; Fe 2 O 3 ≦0.15% by mass; Na 2 O+K 2 O≦0.15% by mass; CaO+MgO+BaO≦0.20% by mass; relative to the total mass of the composition in each case.

5 . A method for producing a shaped refractory ceramic product from a composition according to at least one of the preceding claims, which method comprises the following steps:
providing a composition, the composition comprising: 85 to 99% by mass Y 2 O 3 , and 1 to 15% by mass ZrSiO 4 , relative to the total mass of the composition in each case; mixing the composition with a binder; moulding the composition mixed with a binder into a shaped body; and firing the shaped body to form a shaped refractory ceramic product.

6 . (canceled)

7 . A shaped refractory ceramic product comprising the following phases:
Y 2 O 3 ; Y 2 O 3 —ZrO 2 solid solution; and Y-silicate.

8 . The shaped refractory ceramic product according to claim 7 , the shaped refractory ceramic product having at least one of the following physical properties:
cold compressive strength [MPa]≧40; gas permeability [nPm]≦3.5; bulk density [g/cm 3 ]≧3.90; open porosity [% by vol.]≦24; refractoriness under load T 0 [° C.]≧1,600; refractoriness under load T 0.5 [° C.]≧1,680; permanent change in length at 2,000° C. [lin %]≦−0.5.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Nebe Ulrich
• Nilica Roland
• Zluc Barbara

Classifications

• C04B2235/77

  Density · CPC title

• C04B35/505 Primary

  based on yttrium oxide · CPC title

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title

• C04B38/0058

  open porosity · CPC title

• C04B35/638

  Removal thereof · CPC title