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Preparation method of high-polishing-rate rare-earth polishing powder

A technology of rare earth polishing powder and polishing rate, which is applied in the direction of polishing compositions containing abrasives, can solve the problems of high production costs, and achieve the effects of low cost, simple process and good polishing rate

Inactive Publication Date: 2013-04-24
湖南皓志新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of using oxalate is not common, because although the polishing powder obtained by oxalate has a single crystal structure, the powder has good wear resistance and fluidity, is easy to settle, and is convenient for hydraulic classification. High production cost and difficult to be widely used

Method used

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  • Preparation method of high-polishing-rate rare-earth polishing powder

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Effect test

Embodiment 1

[0024] The preparation process of the present embodiment is as follows:

[0025] Add 4.5m to the reactor 3 Deionized water, and add 1000kg lanthanum cerium carbonate (in lanthanum cerium carbonate: the ratio of lanthanum cerium is 35:65 according to the oxide calculation, the central particle size is 18μm, and the rare earth oxide content is 45%) under stirring state, heated to 70 ℃, continue to stir for 1 hour, add 243.1kg of oxalic acid solution with a mass concentration of 10%, control the flow rate at 4L / min, and continue to react for 1 hour after the oxalic acid solution is added; ), rinse with deionized water until the conductivity of the filtrate is 2 / g of rare earth oxide microparticles to obtain 436kg of rare earth oxide microparticles; thereafter, the rare earth oxide microparticles obtained are packed into a mixer together with 2.80kg of sodium hexametaphosphate and 1.05kg of sodium chloride (this example uses 1m 3 Twin-screw conical mixer), mixing for 2 hours to ...

Embodiment 2

[0027] Add 4.5m to the reactor 3 Deionized water, and pour 1000kg lanthanum cerium praseodymium carbonate (in the lanthanum cerium praseodymium carbonate: the ratio of lanthanum cerium praseodymium according to oxide calculation is 29:69:2, central particle diameter 15 μ m, rare earth oxide content is 47 %), heated to 85°C, continued to stir for 4 hours, added 328.6kg of ammonium oxalate solution with a mass concentration of 20%, controlled the flow rate at 4L / min, and continued to react for 1 hour after adding the ammonium oxalate solution; (This example uses a PGZ1250N centrifuge), rinse with deionized water until the conductivity of the filtrate is 2 / g of rare earth oxide microparticles to obtain 441kg of rare earth oxide microparticles; thereafter, the obtained rare earth oxide microparticles are packed into a mixer together with 4.20kg of sodium polyacrylate and 0.25kg of sodium hydroxide (this example uses 1m 3 twin-screw conical mixer), and mix for 2 hours to obtain hi...

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Abstract

The invention discloses a preparation method high-polishing-rate rare-earth polishing powder, relating to the technical field of rare-earth polishing material preparation. The preparation method comprises the following steps: proportioning, preparing a water dispersion solution, carrying out semi-solid-phase synthesis, calcining, pulverizing and mixing. The preparation method has the characteristics of simple process, low cost, low energy consumption and the like. The rare-earth polishing powder prepared by the method has the characteristics of higher polishing rate, favorable suspensibility, favorable wear resistance, favorable fluidity, environmental protection and the like, and can be widely used for polishing mobile phone cover plates, high-precision optical lenses, optical filters, glass disc substrates, liquid crystal glass and other objects.

Description

technical field [0001] The invention relates to the technical field of preparation of rare earth polishing materials, in particular to a preparation method of high polishing rate rare earth polishing powder applied in the technical field of cold processing of glass materials. Background technique [0002] Rare earth polishing powder is an inorganic polishing material based on cerium oxide, which is mainly used in cold processing of various materials for smooth surface. Due to its unique and cost-effective use characteristics, it is particularly prominent in the polishing of glass products, such as various optical glass devices, TV picture tubes, optical glasses lenses, oscilloscope tubes, flat glass, semiconductor wafers and metal precision products. The polishing of such objects has also become an indispensable basic raw material for the development of the optical and electronic industries in the world today. The development of rare earth polishing powder in my country sta...

Claims

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Application Information

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IPC IPC(8): C09G1/02
Inventor 巩强
Owner 湖南皓志新材料股份有限公司
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