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Prepn. of nano RE oxide powder

A technology of oxide powder and rare earth oxide, which is applied in the fields of rare earth metal compounds, chemical instruments and methods, inorganic chemistry, etc., and can solve problems such as particle size distribution of unreported aggregates

Inactive Publication Date: 2003-01-08
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also no aggregate particle size distribution of the reported product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 1.35Kg of 99.9% neodymium oxide, dissolve it with 3mol / L hydrochloric acid to prepare a 0.2mol / L neodymium chloride solution, weigh 2Kg ammonium bicarbonate, and prepare a 150g / L solution. Add it to the neodymium chloride solution at a speed of 1. After the precipitation is complete, filter it quickly, take out the filter cake of neodymium carbonate, add 125g of polyvinyl alcohol, heat to 30°C, stir for 3 hours to form a solid foam, dry it at 800°C, and calcinate After 3 hours, 1.32Kg of nano neodymium oxide powder was obtained. After analysis and testing, the particle size is 40-80nm, D 50 400nm, D 90 1.0 μm.

Embodiment 2

[0012] Weigh 1.70Kg of 99.99% europium oxide, dissolve it with 5mol / L hydrochloric acid to prepare a 0.4mol / L europium chloride solution, weigh 2Kg ammonium bicarbonate, and prepare a 120g / L solution. Add it to the europium chloride solution at a speed of 1. After the precipitation is complete, filter it quickly, take out the europium carbonate precipitate, add 25g of sodium dodecylbenzenesulfonate, heat to 80°C, stir for 5 hours to form a solid foam, and dry it at 800 C, and calcined for 2 hours to obtain 1.68Kg of nano europium oxide powder. After analysis and testing, the particle size is 40-80nm, D 50 220nm, D 90 is 0.82 μm.

Embodiment 3

[0014] Take by weighing 1.60Kg 99.9% erbium oxide, dissolve and prepare 0.3mol / L erbium chloride solution with 5mol / L hydrochloric acid, take by weighing 2Kg ammonium bicarbonate, prepare 170g / L solution, in constant stirring, with 150ml / min Add it into the erbium chloride solution at a high speed, after the precipitation is complete, filter it quickly, take out the erbium carbonate precipitate, add 30g of oleic acid, heat at 90°C, stir for 7 hours to form a solid foam, after drying, calcinate at 900°C for 3 hours, Get nano erbium oxide powder 1.55Kg. After analysis and testing, the particle size is 40-80nm, D 50 147nm, D 90 217nm.

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Abstract

The preparation method of nano rare earth oxide powder uses rare earth oxide as raw material, and includes the following steps: adding hydrochloric acid or nitric acid solution and ammonium hydrogen carbonate solution to produce rare earth carbonate precipitate, filtering, adding 1-10 wt% of surfactant in rare earth carbonate filter cake, heating to 30-100 deg.C, stirirng for 3-8 hr. to form solid foam, oven-drying, calcining to obtain the nano rare earth oxide powder. Its grain size is less than 100 nm, specific area is above 10 sq.m / g, and its agglomeration body grain size D50 is less than 400 nm and D90 is less than 1.0 micrometers.

Description

technical field [0001] The invention relates to a preparation method of nano oxide powder, in particular to a preparation method of nano rare earth oxide powder. Background technique [0002] Due to the small size effect, surface and interface effect, quantum size effect, and macroscopic quantum tunneling effect, rare earth oxide nanopowders have excellent physical and chemical properties compared with conventional powders. As high-tech materials, they have been widely used Applied to industrial products, such as adding Y to PLZT and PTC resistance elements 2 o 3 , Sm 2 o 3 ,Nd 2 o 3 Nano powder; CeO 2 Nano polishing powder; catalyst carrier; solid fuel electrolyte; oxygen sensor; FED, PDP phosphor (Y 2 o 3 : Eu); superconducting materials; structural ceramic materials, etc. At present, the preparation methods mainly include alcohol salt hydrolysis, hydrothermal method, thermal decomposition method, precipitation method and so on. [0003] There are many methods fo...

Claims

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Application Information

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IPC IPC(8): C01F17/00
Inventor 刘志强霍成章梁振锋林衍州肖方明
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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