A kind of preparation method of cerium-praseodymium stabilized zirconia polishing powder

A technology for stabilizing zirconia and polishing powder, applied in polishing compositions containing abrasives, etc., can solve problems such as low removal rate, and achieve the effects of simple preparation method, low cost, and improved removal rate

Active Publication Date: 2018-03-06
山东麦丰新材料科技股份有限公司
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  • Description
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Problems solved by technology

In the above prior art, the polishing performance of the polishing powder is improved by doping iron elements into the zirconia polishing powder, but the removal rate of the prepared polishing powder is about 3.3-3.5 μm / min, which is lower than that of imported products removal rate (3.6-3.8μm / min)

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  • A kind of preparation method of cerium-praseodymium stabilized zirconia polishing powder

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preparation example Construction

[0020] The invention provides a preparation method of cerium-praseodymium stabilized zirconia polishing powder, comprising the following steps:

[0021] (1) zirconium carbonate, cerium carbonate, praseodymium carbonate and hydrochloric acid solution are mixed, obtain mixed solution;

[0022] (2) Adding the mixed solution to an alkali solution under stirring, a precipitation reaction occurs, and a basic zirconium carbonate cerium praseodymium co-precipitation is obtained;

[0023] (3) The basic zirconium carbonate cerium-praseodymium co-precipitation is sequentially subjected to the first roasting, crushing and second roasting to obtain the cerium-praseodymium stabilized zirconia polishing powder.

[0024] In the present invention, the source of the raw materials is not limited, it only needs to ensure that the impurity content of zirconium carbonate, cerium carbonate and praseodymium carbonate is less than 100ppm.

[0025] In the present invention, the mass ratio of zirconium...

Embodiment 1

[0039] Add 20kg deionized water in the reaction kettle, add 1.8kg zirconium carbonate, 0.19kg cerium carbonate and 0.01kg carbonic acid spectrum under stirring, then add the hydrochloric acid solution that mass concentration is 5% to dissolve, until raw material dissolves completely, then heat solution to 50°C, under the stirring state with a stirring frequency of 20Hz, add a mixed solution of sodium hydroxide and sodium carbonate with a concentration of 120g / L at a speed of 90ml / min, the mass ratio of sodium hydroxide and sodium carbonate is 1:1, Until the pH of the solution is 6.5, basic zirconium carbonate cerium praseodymium co-precipitation is obtained, and aged at room temperature for 8H; the aged basic zirconium cerium praseodymium carbonate coprecipitation is soaked and washed with deionized water for 4 times, each deionized water The dosage is 3 times the volume of the precipitate. After washing, enter the centrifuge to dry, put the dried co-precipitation into the kiln...

Embodiment 2

[0042] Add 20kg deionized water in the reactor, add 2.4kg zirconium carbonate, 0.095kg cerium carbonate and 0.005kg carbonic acid spectrum under stirring, then add the hydrochloric acid solution that mass concentration is 6% to dissolve, until raw material dissolves completely, then heat solution to 60°C, under the stirring state with a stirring frequency of 25Hz, add a mixed solution of sodium hydroxide and sodium carbonate with a concentration of 110g / L at a speed of 100ml / min, the mass ratio of sodium hydroxide and sodium carbonate is 2:1, Until the pH of the solution is 6.0, basic zirconium carbonate cerium praseodymium co-precipitation is obtained, and aged for 10H at room temperature; the aged basic zirconium cerium praseodymium carbonate coprecipitation is soaked and washed with deionized water for 5 times, and each deionized water The dosage is 3 times of the precipitation volume. After the washing is completed, enter the centrifuge for drying, then put the dried co-preci...

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Abstract

The invention discloses a preparation method of cerium and praseodymium stabilized zirconia polishing powder. The preparation method comprises the following steps: mixing zirconium carbonate, cerium carbonate, praseodymium carbonate and a hydrochloric acid solution to obtain a mixed solution; adding an alkaline solution into the mixed solution in a stirring state, and carrying out a precipitation reaction to obtain alkaline zirconium carbonate cerium and praseodymium coprecipitation; and carrying out first roasting, smashing and second roasting in sequence on the alkaline zirconium carbonate cerium and praseodymium coprecipitation so as to obtain the cerium and praseodymium stabilized zirconia polishing powder. The two elements of cerium and praseodymium are doped into the zirconia polishing powder, and the polishing powder obtained through first roasting, smashing and second roasting has relatively high removing rate and relatively low micro scratch level, so that the polishing performance of the polishing powder is improved, and the requirements for high-precision and large-diameter optical glass lenses in the market are met.

Description

technical field [0001] The invention relates to the field of preparation of polishing materials, in particular to a preparation method of cerium-praseodymium stabilized zirconia polishing powder. Background technique [0002] With the advancement of science and technology, the market demand for high-precision, large-diameter optical glass lenses is increasing, and the demand for high-hardness polished products is also increasing. Chemical mechanical polishing is a new type of polishing technology that combines chemical corrosion and mechanical grinding. Through the synergistic effect of chemical corrosion of polishing slurry and grinding of ultra-fine particles, the surface of the polished workpiece is flattened. Therefore, it is very important to choose a polishing powder with good comprehensive performance to obtain products such as glass that meet the needs of the market. [0003] For glass polishing, currently commonly used polishing powders are cerium oxide, zirconia a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09G1/02
CPCC09G1/02
Inventor 于长江
Owner 山东麦丰新材料科技股份有限公司
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