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Rare-earth cobaltous carbonate powder and manufacture method thereof

A manufacturing method and technology of cobalt carbonate, which is applied in the field of metallurgical products, can solve the problems of poor powder shape, dendrite or needle shape, difficult to control the shape, coarse powder particle size, etc., and achieve the effect of improved product properties, perfect shape, and uniform distribution

Active Publication Date: 2008-12-31
GEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the genetic characteristics of cobalt oxalate raw materials, the rare earth Co powder prepared from rare earth cobalt oxalate has a relatively coarse powder particle size, and the powder shape is mostly poor dendritic or needle-like, and the shape is difficult to control, resulting in certain restrictions on its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adopt sodium carbonate (ammonium carbonate), cobalt chloride and yttrium chloride raw material, make the equal volume solution of following content: the solution concentration of cobalt chloride is: 2.0M, the yttrium chloride solution concentration is: 0.004M, sodium carbonate ( Ammonium carbonate) solution concentration is: 2.006M.

[0026] Heat the above-prepared solutions separately to dissolve the solids completely, adjust the pH of the solution to 8.0-9.0, stir evenly and heat to 50-90°C, keep the temperature constant and stir continuously. After the chemical co-deposition reaction is completed, the precipitated powder and the solution Separate and filter, wash with clean water, and dry in a vacuum oven at 70 to 90°C for 1 to 1.5 hours to obtain rare earth cobalt carbonate powder (equivalent to yttrium element: 0.14%, cobalt carbonate : 99.86%).

Embodiment 2

[0028] Adopt sodium bicarbonate (ammonium bicarbonate), cobalt chloride and yttrium chloride raw material, make the equal volume solution of following content: the solution concentration of cobalt chloride is: 3.0M, and yttrium chloride solution concentration is: 0.088M, carbonic acid The solution concentration of sodium hydrogen (ammonium bicarbonate) is: 2.264M;

[0029] Heat the prepared A, B, C, and D solutions above to completely dissolve the solids, adjust the pH value of the solution to 8.0-9.0, stir evenly and heat to 50-90°C, keep the temperature constant and stir continuously, until the chemical co-deposition reaction is completed Afterwards, the precipitated powder is separated and filtered from the solution, washed with clean water, and dried in a vacuum oven at 70 to 90° C. for 1 to 1.5 hours to obtain cobalt: rare earth cobalt carbonate powder with a weight ratio of yttrium=100:5 (equivalent to yttrium element: 2.4%, cobalt carbonate: 97.6%).

Embodiment 3

[0031] Adopt sodium carbonate (ammonium carbonate), cobalt chloride and cerium chloride (lanthanum) raw material, make the equal volume solution of following content: the solution concentration of cobalt chloride is: 2.0M, and cerium chloride (lanthanum) solution concentration is: 0.0026M, the solution concentration of sodium carbonate (ammonium carbonate) is: 2.004M.

[0032] Heat the above-prepared solutions separately to dissolve the solids completely, adjust the pH of the solution to 8.0-9.0, stir evenly and heat to 50-90°C, keep the temperature constant and stir continuously. After the chemical co-deposition reaction is completed, mix the precipitated powder with The solution is separated and filtered, washed with clean water, and dried in a vacuum oven at 70 to 90° C. for 1 to 1.5 hours to obtain rare earth cobalt carbonate powder (equivalent to cerium (lanthanum) element: 0.14%, cobalt carbonate: 99.86%).

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Abstract

The invention relates to a rare earth carbonate cobalt powder and a production method thereof; the powder comprises spherical or near-spherical carbonate cobalt powder with the particle size less than or equal to 1.5Mum and rare earth components evenly distributed in the carbonate cobalt powder, the powder consists of the components with the following weight portions: 0.14-2.4% of rare earth elements, 97.10-99.86% of cobaltous carbonate, and 0-0.5% of unavoidable impurities. The rare earth carbonate cobalt powder of the invention and the production method thereof have the following advantages that: the obtained carbonate cobalt powder has finer powder size and better shape, wherein, the rare earth components are distributed evenly, and the superior rare earth cobalt powder can be produced subsequently, and the preparation is simple and the cost is low, being applicable to conventional process production.

Description

technical field [0001] The invention relates to a metallurgical product, more specifically, the invention relates to a rare earth cobalt powder metal product and its production technology. Background technique [0002] In the fields of powder metallurgy and cemented carbide production, rare earth Co powder is receiving increasing attention due to its excellent performance. The method of preparing rare earth Co powder from rare earth cobalt oxalate has been reported. However, due to the genetic characteristics of the cobalt oxalate raw material, the rare earth Co powder prepared from the rare earth cobalt oxalate has a coarse powder particle size, and the powder shape is mostly poor dendritic or needle-like, and the shape is difficult to control, resulting in certain restrictions on its application. [0003] How to improve the performance of rare earth cobalt powder: further improving the particle size and shape of rare earth cobalt powder is becoming the development directi...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24
Inventor 刘沙许开华
Owner GEM CO LTD
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