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Production method of modified yttrium oxide

A manufacturing method and technology of yttrium oxide, applied in the field of inorganic materials and its manufacturing, can solve problems such as poor process performance, low sanding rate of fused yttrium oxide, and low storage time of coating slurry powder liquid, etc., to improve the process Operability, high powder-to-liquid ratio, smooth surface effect

Active Publication Date: 2019-06-25
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

However, the sand yield of fused yttrium oxide obtained by this method is low, and the powder-liquid ratio of the coating slurry made by this method is relatively low and the storage time is short, and the process performance is poor.

Method used

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  • Production method of modified yttrium oxide
  • Production method of modified yttrium oxide
  • Production method of modified yttrium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of manufacture method of modified yttrium oxide, manufacture method comprises the steps:

[0031] Step 1: batching, taking 2-17 parts by weight of zirconia and 83-98 parts by weight of yttrium oxide, pulverizing them to a size smaller than or equal to 100 mesh, and mixing the pulverized zirconia and yttrium oxide evenly to obtain a mixed charge;

[0032] Step 2: Smelting, put the mixed charge into the electric arc furnace for smelting, the melting temperature is greater than or equal to 2410°C, after T 1 min time until the mixed charge is completely melted to obtain the modified yttrium oxide in molten state;

[0033] Further also include the following steps:

[0034] Step 3: cooling down, cooling the modified yttrium oxide melted in step 2 to room temperature;

[0035] Step 4: Crushing, smashing and sorting the modified yttrium oxide after cooling in step 3, the purpose of picking is to pick out the lumps that have not melted well on the surface and have raw m...

Embodiment 2

[0045] Step one, the ingredients will contain ZrO 2 3 parts by weight of fused desiliconized zirconium with a weight content greater than 99% and 97 parts by weight of yttrium oxide with a weight content of 3N are put into a mixer and mixed evenly to make a mixed charge.

[0046] Step 2, smelting, put the mixed charge into the electric arc furnace in batches, for example: smelting in a three-phase AC electric arc furnace until the charge is completely melted, and continue refining after melting. The time ratio of melting and refining is 3:2, each charge Carry out melting for 30 minutes, refining for 20 minutes, and the melting temperature is 2600°C.

[0047] Step 3, lowering the temperature, cooling down the melted melt to room temperature.

[0048]Step 4, smashing, smashing and picking the melt. The frit after picking is processed into sand and fine powder with the particle size required by the user by crushing equipment. The size above 100 mesh is less than 100 mesh. The c...

Embodiment 3

[0050] will contain ZrO 2 5 parts by weight of natural baddeleyite with a weight content greater than 99% and 95 parts by weight of yttrium oxide with a weight content of 4N are put into a mixer and mixed evenly to make a mixed charge. Other steps are the same as in Embodiment 1 and will not be repeated.

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Abstract

The invention relates to a production method of modified yttrium oxide. The production method comprises the following steps: step 1, burdening: weighing 2 to 17 parts by weight of zirconia and 83 to 98 parts by weight of yttrium oxide, smashing the raw materials to be less than or equal to 100 meshes, and uniformly mixing the smashed zirconia oxide and yttrium oxide to obtain mixed furnace charge;step 2, smelting: placing the mixed furnace charge into an electric-arc furnace for smelting at a melting temperature of larger than or equal to 2410 DEG C for T1 minutes till the mixed furnace charge is molten completely to obtain molten melt containing the modified yttrium oxide. The fused yttrium oxide produced by the method is high in sand production rate, meets the user demands, and can lower the production cost; coating slurry prepared from the fused yttrium oxide is high in powder-liquid ratio, and the improvement of the density of a titanium alloy investment casting coating is facilitated, so that the quality of castings is improved; the coating slurry is less liable to gelatinize and is long in storage time, the process operation performance is improved, and the titanium alloy castings casted by a fired mold are smooth in surface layers.

Description

technical field [0001] The invention relates to an inorganic material and a manufacturing method thereof, in particular to a manufacturing method of modified yttrium oxide. Background technique [0002] Yttrium oxide is one of the minerals with relatively abundant reserves of rare earth oxides in my country. Among more than ten kinds of rare earth oxides, its price is relatively low, and it has some unique properties, such as high refractoriness and no reaction with titanium alloy melt; Fused yttrium oxide is a new product researched and developed with yttrium raw material by special process. It has the characteristics of high purity, large crystal size, high temperature resistance, good thermal conductivity, strong impermeability, etc. It can be used in titanium casting industry and special ceramic industry . [0003] At present, sintered yttrium oxide is used as the coating material for titanium alloy investment casting. The original powder of yttrium oxide is pressed into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/66C04B35/626
Inventor 余鑫萌李起胜李群李疆鹰
Owner 郑州振中电熔新材料有限公司
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