Sintered and doped product based on zircon + nb2o5 or ta2o5

A ta2o5, product technology, applied in the field of new sintered materials, can solve the problems that the glass plate is difficult to meet the size specification, and the productivity of glass manufacturing equipment is reduced.

Active Publication Date: 2009-09-02
SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In certain glass applications, especially in the forming of glass sheets, it is necessary to limit creep as much as possible, since it can induce deformation of the refractory block which makes it difficult for the glass sheets to meet dimensional specifications and reduces the productivity of glass manufacturing plants Decreased significantly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The following non-limiting examples are provided for the purpose of illustrating the invention.

[0075] In these examples, the raw materials employed (percentages are by weight) are selected from:

[0076] - Contains 66.8% ZrO 2 +HfO 2 , 32.7% SiO 2 , 0.2% Al 2 o 3 and 0.1% TiO 2 zircon sand;

[0077] - Contains 96.6% TiO 2 , 1.7% Fe 2 o 3 , 0.8% SiO 2 and 0.6% Al 2 o 3 Titanium oxide (for reference only);

[0078] - Purity greater than 99.9%, particle median diameter (D 50 ) niobium oxide of about 15 μm (Example 2) or about 1 μm (Example 13, 14);

[0079] - Purity greater than 99.9%, particle median diameter (D 50 ) tantalum oxide of about 15 μm (Examples 3, 4) or about 1 μm (Examples 6-14);

[0080] - yttrium oxide with a purity greater than 99.9% and a particle median diameter of 3-4 μm;

[0081] - phosphoric acid (85% H 3 PO 4 aqueous solution); and

[0082] - Contains more than 98% SiO 2 , and has a median diameter of about 10 μm (D 50 ) of c...

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Abstract

Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60% < ZrO2 + HfO2 < 75%; 27%.< SiO2 < 34%; O < TiO2; O < Y2O3 < 3.5%; 0.1 % < Nb2O5 + Ta205 <= 5%; and other oxides: < 1,5 %; for a total of 100%. Use in a glass furnace.

Description

technical field [0001] The present invention relates to a novel sintered material prepared from zircon, a method for its preparation and its use in glass melting furnaces. Background technique [0002] Among refractory products, a distinction is made between fused cast and sintered products. [0003] Unlike sintered products, fused-cast products usually include a very rich intergranular glass phase, which fills the network of crystalline grains. Therefore, the problems encountered in the respective applications of sintered products and cast products and the technical solutions to solve these problems are usually different. Furthermore, due to the significant differences between the preparation methods, compositions developed for the preparation of fused cast products cannot be deduced as such for the preparation of sintered products, and vice versa. [0004] The sintered product is obtained by mixing suitable raw materials, then shaping the mixture into a green state, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C03B5/43
CPCC04B2235/727C04B2235/3251C04B2235/72C04B2235/3206C04B2235/77C04B2235/3284C04B2235/3279C04B35/481C04B2235/3248C04B2235/5436C04B2235/3225C03B5/43C04B35/48C04B35/622
Inventor O·西蒂J·弗卡德
Owner SAINT GOBAIN CENT DE RES & DEVS & DETUD EUROEN
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