Particle-size-controllable nano and sub-micron CeO2 preparation method

A submicron and nanotechnology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of difficult control of particle size, and achieve the effect of simple equipment and steps, low energy consumption, and controllable particle size

Inactive Publication Date: 2013-06-12
NAT ENG RES CENT OF RARE EARTH METALLURGY & FUNCTION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for precise control over both concentrations or types of materials used during manufacturing processes by creating small particles with specific sizes that can be easily separated from each other without leaving any residue on their surface.

Problems solved by technology

This patented describes various techniques for producing small particles called quantum cathode active (QCA), nanoparticles made from different starting compounds like cerium dioxy triacetatite, cerous chirpum carbons, zinc sulphates, calcium fluorsulfonate, etc., that have unique properties such as good optical function, fast reactivity, light absorption capacity, heat conduction property, catalytic activity, antimony emission property, surface modification, coagulation behavior, sinterability, thermal stability, and resistance against corrosion. These technical problem addressed in this patent includes how to produce these fine particles efficiently while maintain their desired characteristics during manufacturing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: dissolve cerium carbonate with nitric acid or dissolve cerium nitrate with water, be mixed with 0.55mol / L cerium nitrate solution, get 10L cerium nitrate solution of this concentration, add polyacrylamide 1.18g, polyvinyl alcohol 1.18g, polyethylene glycol Alcohol 1.18g, phenethylphenol polyoxyethylene ether 1.18g into A solution, take 7.68L2.5mol / L NH 4 HCO 3 The solution becomes solution B, heat solution A to 70°C-100°C, then add solution B dropwise to solution A to form a white precipitate, control the pH value to 7-10, stir the precipitate for 10 minutes, and filter out the precipitate. Then burn at 400°C for 4 hours, the heating rate is 100°C / hour, and the product is nano-CeO 2 , its laser particle size analyzer test particle size D 50 9nm.

Embodiment 2

[0023] Embodiment 2: dissolve cerium carbonate with nitric acid or dissolve cerium nitrate with water, be mixed with 0.85mol / L cerium nitrate solution, get the cerium nitrate solution of this concentration of 8L, add phenylethylphenol polyoxyethylene ether 3.90g, polyacrylamide 3.90 g, polyethylene glycol 3.90g into A solution, take 9.49L of 2.5mol / L NH 4 HCO 3 Turn the solution into solution B, heat solution A to 70°C-100°C, then add solution B dropwise to solution A to form a white precipitate, control the pH value to 7-10, stir the precipitate for 10 minutes, filter the precipitate, and then Burning at 450°C for 4 hours, the heating rate is 500°C / hour, the product is nano-CeO 2 , its laser particle size analyzer test particle size D 50 89nm.

Embodiment 3

[0024] Embodiment 3: dissolve cerium carbonate with nitric acid or dissolve cerium nitrate with water, be mixed with 1.05mol / L cerium nitrate solution, get the cerium nitrate solution of 6L this concentration, add polyvinyl alcohol 8.13g, polyacrylamide 8.13g to form A solution, Take 8.79L2.5mol / L of NH 4 HCO 3 Turn the solution into solution B, heat solution A to 70°C-100°C, then add solution B dropwise to solution A to form a white precipitate, control the pH value to 7-10, stir the precipitate for 10 minutes, filter the precipitate, and then Burn at 550°C for 2 hours, the heating rate is 2000°C / hour, the product is nano-CeO 2 , its laser particle size analyzer test particle size D 50 102nm.

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Abstract

The invention relates to a particle-size-controllable nano and sub-micron CeO2 preparation method which is characterized by comprising the following steps: by taking cerium nitrate as a solution, adding high molecular surface composite dispersant into the solution, heating the solution to 70-100 DEG C, adding a precipitant solution while stirring in the solution, filtering the precipitate, and then firing at 400-550 DEG C to obtain CeO2 having different particle sizes. The invention has the following advantages: the nano and sub-micron CeO2 prepared by controlling the concentration of the cerium nitrate and controlling the combination and addition of the composite dispersant based on a chemical precipitation method through precipitating, filtering and firing can achieve particle size controllability; the method omits water washing and drying operations; and the preparation method is simple in related equipment and steps, low in cost, low in energy consumption, simple to operate and controllable in particle size.

Description

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Claims

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Application Information

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Owner NAT ENG RES CENT OF RARE EARTH METALLURGY & FUNCTION MATERIALS
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