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Corn-like nanometer lanthanum cerium oxide/graphene composite rare earth polishing powder and preparation method

A composite technology of nano-lanthanum oxide and graphene, which is applied in the fields of polishing compositions containing abrasives, semiconductor/solid-state device manufacturing, and electrical components. The effect of purity

Active Publication Date: 2016-06-29
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a corn-like nano-lanthanum cerium oxide / graphene composite rare earth polishing powder and a preparation method for the glass polishing powder in the prior art, which is very easy to scratch the glass. The obtained nano-lanthanum cerium oxide / Graphene composite material wraps graphene evenly in lanthanum cerium oxide particles, which has a high abrasiveness to glass and can alleviate the brittleness of polishing powder in real time, thereby avoiding scratches to glass and excellent polishing performance

Method used

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  • Corn-like nanometer lanthanum cerium oxide/graphene composite rare earth polishing powder and preparation method
  • Corn-like nanometer lanthanum cerium oxide/graphene composite rare earth polishing powder and preparation method
  • Corn-like nanometer lanthanum cerium oxide/graphene composite rare earth polishing powder and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Weigh 8.9305g of industrial lanthanum cerium carbonate (atomic ratio La:Ce=1:2) and dissolve it in 50.00ml deionized water, slowly add dilute nitric acid, stop adding when the pH value of the solution is 6.5~7.0, then add 13.5112g urea and 1.0 Add 25.0mL graphene oxide solution with a concentration of 1.0mg / mL to gCTAB, slowly mix the above two solutions, add deionized water to mix evenly and make the volume of the whole solution reach 120mL, then transfer it to a microwave hydrothermal reaction tank, Under the condition of constant stirring, the temperature was raised from room temperature to 85° C. within 5 minutes and kept for 20 minutes, then the temperature was raised to 180° C. within 15 minutes and kept for 60 minutes to obtain off-white lanthanum cerium oxide / graphene composite rare earth polishing powder. The morphology of the obtained material is shown in figure 1 As shown in a, the partial enlarged picture is shown in figure 1 b and figure 1 As shown in c, ...

Embodiment 2

[0027] Weigh 7.6860g of industrial lanthanum cerium carbonate (atomic ratio La:Ce=1:2) and dissolve it in 50.00mL of deionized water, slowly add dilute hydrochloric acid, stop adding when the pH of the solution is 6.5~7.0, then add 10.8876g of urea and 2.5 Add 40.0mL graphene oxide solution with a concentration of 1.0mg / mL to gCTAB, slowly mix the above two solutions, add deionized water to mix evenly and make the volume of the whole solution reach 120mL, then transfer it to the microwave hydrothermal reaction tank, Under the condition of constant stirring, the temperature was raised from room temperature to 85° C. within 5 minutes and kept for 25 minutes, then the temperature was raised to 200° C. within 15 minutes and kept for 30 minutes to obtain off-white lanthanum cerium oxide / graphene composite rare earth polishing powder.

Embodiment 3

[0029] Weigh 10.2784g of industrial lanthanum cerium carbonate (atomic ratio La:Ce=1:2) and dissolve it in 50.00mL deionized water, slowly add dilute sulfuric acid, stop adding when the pH value of the solution is 6.5~7.0, then add 15.6840g urea and 2.02 Add 20.0mL graphene oxide solution with a concentration of 1.0mg / mL to CTAB, slowly mix the above two solutions, add deionized water to mix evenly and make the volume of the whole solution reach 120mL, then transfer it to a microwave hydrothermal reaction tank. Under the condition of constant stirring, the temperature was raised from room temperature to 85° C. within 5 minutes and kept for 30 minutes, then the temperature was raised to 170° C. within 15 minutes and kept for 45 minutes to obtain off-white lanthanum cerium oxide / graphene composite rare earth polishing powder.

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Abstract

The invention discloses corn-shaped nano lanthanum cerium oxide / graphene composite rare earth polishing powder and a preparation method thereof. The preparation method comprises the following steps: dissolving industrial lanthanum cerium carbonate into diluted acid, then adding proper amounts of graphene oxide, urea and a cationic surfactant namely hexadecyl trimethyl ammonium bromide, and performing in-situ composition to prepare a nano lanthanum cerium oxide / graphene composite material by adopting a microwave stirring hydrothermal chemical method, wherein the content of graphene in the lanthanum cerium oxide / graphene composite material is 0.3-1.5%. According to the invention, a main body of the nano lanthanum cerium oxide / graphene composite material is corn-shaped in appearance, and corn kernels on the surface of the main body are nano-sized particles; and the preparation method disclosed by the invention adopts microwave heating and stirring, is advanced in process, short in reaction time and low in cost, has a high polishing corrosion quantity on glass, ensures that the glass surface has no scratch, and is especially suitable for precision polishing of products such as intelligent mobile phone display screens and optical glass.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a corn-like nanometer lanthanum cerium oxide / graphene composite rare earth polishing powder and a preparation method thereof. Background technique [0002] Rare earth polishing powder is widely used in precision polishing of glass devices such as display glass, optical glass, crystal ornaments and precision instruments due to its unique physical and chemical properties and excellent polishing performance. At present, the most used grinding and polishing materials in the world are Rare earth oxides with cerium oxide or lanthanum cerium oxide as the main component. These rare earth polishing powders mostly use water as a dispersant and are used after being mixed into a slurry. However, rare earth polishing powders often have poor suspension, low grinding efficiency, and glass The surface is easy to be scratched and the circulation pipes are blocked or the set process paramet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/312
CPCC09G1/02
Inventor 桂阳海王诗文刘书如刘云李继光周菁
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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