Electric melting method for manufacturing yttria stabilized zirconia

A technology of zirconia and its manufacturing method, which is applied in the field of zirconia, can solve the problems of unsatisfactory corrosion resistance and thermal shock stability, achieve good corrosion resistance and thermal shock stability, prolong service life, and not easy to detach melting effect

Inactive Publication Date: 2011-11-16
郑州振中电熔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the corrosion resistance and thermal shock stability of the material of yttrium-stabilized zirconia cannot meet the requirements for use in functional refractory materials for metallurgical continuous casting, and a kind of electrofusion of yttrium-stabilized zirconia is provided. Manufacturing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The electrofusion manufacturing method of yttrium stabilized zirconia, its operation steps are as follows:

[0017] (1) 94.3kg of fused desiliconized zirconium with a content of zirconia greater than 96%, 3.2kg of yttrium oxide, and 2.5kg of calcium oxide are uniformly mixed by a mixer to make a mixed charge;

[0018] (2) Put the mixed charge in the step (1) into the electric arc furnace for smelting, the melting temperature is 3500°C, melt into mounds or cast into blocks after melting;

[0019] (3) Cool the melt in step (2) with water cooling at a cooling rate of 100°C / hour. After the temperature is lowered to 50°C, smash and select the melt, and process the frit after inspection with crushing equipment into the granularity required by the user. Depending on the needs of users, the crushed materials can be packaged and stored after being calcined, or can be packaged and stored directly without calcination.

Embodiment 2

[0021] The electric fusion manufacturing method of yttrium stabilized zirconia, its operation steps are as follows: 63.3kg of electric fusion desiliconized zirconium with the content of zirconia greater than 96%, 30kg of natural baddeleyite, 3kg of yttrium oxide, 1kg of magnesium oxide, mixed The feeder mixes uniformly to make a mixed charge, and all the other manufacturing methods are the same as in Example 1.

Embodiment 3

[0023] The electrofusion manufacturing method of yttrium stabilized zirconia, its operation steps are as follows: 40kg of fused desiliconized zirconium with a zirconia content greater than 96%, 40kg of chemical zirconium, and 9kg of yttrium oxalate are uniformly mixed by a mixer to form a mixed Furnace charge, all the other manufacturing methods are with embodiment 1.

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Abstract

The invention discloses an electric melting method for manufacturing yttria stabilized zirconia. The method comprises the following steps: uniformly mixing 80-97 weight parts of monoclinic zirconia, 3-9 weight parts of yttrium compound, 0-3.4 weight parts of calcium compound and 0-3 weight parts of magnesium compound in a mixer to prepare mixing furnace charge, then putting into a arc furnace for melting, cooling a melt, and crushing. An yttria stabilized zirconia refractory material produced by the invention has a true density higher than 6.0g / cm<3>, a stabilization rate higher than 70%, compact material structure, good erosion resistance and thermal shock stability, so as to prolong service life of refractory material. In addition, the yttria stabilized zirconia can be applied to various zirconia ceramics, such as zirconia grinding medium, zirconia oxygen probe and plasma spraying.

Description

technical field [0001] The invention relates to zirconium dioxide, in particular to an electrofusion manufacturing method for yttrium-stabilized zirconium dioxide. Background technique [0002] There are roughly three ways to produce zirconia by the original electric melting method: the first one uses a pouring three-phase electric arc furnace, puts the mixture into the electric arc furnace to melt, refine, pours it into a water-cooled mold to cool, and then crushes it; the second one The method is to blow the refined molten material into balls with high-pressure air, and then crush it after cooling; the third method is to use a fixed three-phase electric arc furnace, add part of the mixture and melt it, and then shell it and cool it to crush it. The common defects of the zirconia produced by these three kinds of original electrofusion methods are: the material is not dense, the porosity is high, and the stabilization rate fluctuates greatly, which cannot meet the requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/653
Inventor 余鑫萌徐宝奎李起胜李群
Owner 郑州振中电熔新材料有限公司
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