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Method for producing platinum material reinforced with dispersed oxide

A dispersion-enhanced, oxide technology, applied in manufacturing tools, glass manufacturing equipment, glass furnace equipment, etc., can solve the problem of not being able to further improve the creep strength

Inactive Publication Date: 2002-12-04
TANAKA PRECIOUS METAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The previous method of dispersing zirconia in platinum can ensure a certain creep strength, that is, a certain creep rupture period, but it is not sufficient to obtain further improvement in creep strength

Method used

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  • Method for producing platinum material reinforced with dispersed oxide
  • Method for producing platinum material reinforced with dispersed oxide
  • Method for producing platinum material reinforced with dispersed oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this Example 1, Pt powder having a particle size of about 0.6 µm was used. Add urea solution to the mixture of platinum powder suspension and zirconium nitrate solution to form platinum powder loaded with zirconium hydroxide, so as to make platinum material. The Pt powder used here is prepared in such a way that it contains a specific surface area of ​​about 23m 2 / g of Pt powder and CaCO 3 The suspension was subjected to ball milling, the suspension was heated at a high temperature of 1100° C., the material obtained after heating at high temperature was poured into water, and treated with nitric acid.

[0035] Pour 1kg of platinum powder into 1.5kg of pure water to prepare platinum powder suspension. Add Zr(NO 3 ) 4 solution (4.56 g, concentration: 96.66%), and a mixed solution was prepared. Heat this mixed solution to boil.

[0036] After boiling, an aqueous urea solution (4.0 g) was added to the mixed solution to adjust the pH of the solution to 7.0. After ...

Embodiment 2

[0042] In Example 2, the same Pt ​​powder as described in Example 1 was used, while zirconium nitrate solution and urea solution were added to the platinum powder suspension to form platinum powder loaded with zirconium hydroxide, thus preparing platinum material.

[0043] Specifically, 1 kg of platinum powder is poured into 1.5 kg of pure water to prepare a platinum powder suspension. Add Zr(NO 3 ) 4 A mixture of a solution (4.56 g, concentration: 96.66%) and an aqueous urea solution (urea; 4.0 g). The mixture was heated to 90°C and maintained. After confirming that the pH was 7.0 by urea hydrolysis during the hold at 90°C, the mixture was further incubated at 90°C for about 30 minutes, and then the heating was stopped.

[0044] This process makes the Zr(NO 3 ) 4 Converted to precipitated Zr(OH) 4 . Precipitated Zr(OH) 4 supported on Pt particles in a mixed solution.

[0045] The mixed solution was filtered to collect platinum powder loaded with zirconium hydroxide. ...

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Abstract

The present invention aims to provide a method for manufacturing oxide dispersion-enhanced platinum material, which enables zirconia to be more finely dispersed in the platinum material, thereby further improving the creep strength of the oxide dispersion-enhanced platinum material. The invention provides a method for producing a platinum material in which zirconia is finely dispersed in platinum and oxide dispersion is enhanced. The platinum powder is poured into water to prepare a platinum powder suspension; zirconium nitrate solution and Urea solution, adjust the suspension to a given pH value of precipitated zirconium hydroxide, and form platinum powder loaded with zirconium hydroxide; collect platinum powder loaded with zirconium hydroxide, and then make it into a pressed product; in the platinum crystal Sintering and forging pressed products under the condition that secondary recrystallization growth occurs in medium to form platinum ingots; cold rolling the platinum ingots at a processing rate of at least 70%, and then subjecting the products to thermal recrystallization treatment.

Description

technical field [0001] The present invention relates to a method of dispersing oxides in platinum to produce oxide-dispersion strengthened platinum materials. In particular, the present invention relates to a method of making an oxide dispersion enhanced platinum material which is finely dispersed zirconia in platinum. Background technique [0002] Platinum materials with good high temperature strength are mainly used as structural materials for glass melting. The high-temperature strength required for platinum materials is the so-called creep strength. In particular, the most important goal was to develop a platinum material that lasted as long as possible before creep rupture occurred. [0003] In order to improve the creep strength of enhanced platinum, a method of finely dispersing a specific oxide in platinum is employed. A known example of such an oxide dispersion enhanced platinum material is a platinum material having zirconia dispersed therein. In order to produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44B22F1/00B22F1/02B22F3/24C03B5/167C22B11/00C22C1/00C22C1/05C22C1/10C22C5/04C22C32/00
CPCB22F2998/10C03B5/1672C03B5/1675C22C1/1026C22C32/0021B22F3/10B22F3/17C22C1/00
Inventor 庄司亨人见聪一高木美和渡边嘉伸
Owner TANAKA PRECIOUS METAL IND
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