Spray coprecipitation method for preparation of Y2O3 based transparent ceramic powder

A technology of transparent ceramics and co-precipitation, which is applied in the field of nano-powder preparation to achieve the effect of weak agglomeration, less demanding experiment schedule, and excellent powder molding

Active Publication Date: 2016-06-08
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] There is no preparation of Y by spray co-precipitation 2 o 3 A report on base transparent ceramic powder

Method used

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  • Spray coprecipitation method for preparation of Y2O3 based transparent ceramic powder
  • Spray coprecipitation method for preparation of Y2O3 based transparent ceramic powder
  • Spray coprecipitation method for preparation of Y2O3 based transparent ceramic powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Pure Y 2 o 3 Powder

[0032] Prepare yttrium nitrate solution with a concentration of 3.0mol / L, spray the mixed solution of 1.5mol / L ammonium bicarbonate and ammonia water into nitric acid with a Teflon nozzle with a diameter of 0.5mm and a stirring rate of 500r / min In the yttrium solution, the molar concentration ratio of ammonium bicarbonate to ammonia water is 1:2, the pressure of the air compressor is 300KPa, the liquid supply rate of the peristaltic pump is 5ml / min, and the pH value is adjusted to 8 with a 4-stage air filter.

[0033] Stirring was continued for 10 minutes after sparging had ended. The resulting solution was statically aged at room temperature for 12 h. Suction filtration after the aging, the suction filtration speed is 60ml / min, obtain the precursor, wash the obtained precursor with deionized water 3 times, wash 3 times with absolute ethanol, to fully remove impurities such as residual acid ions, remove The volume ratio of ionized wa...

Embodiment 2

[0035] Embodiment 2: (Nd 0.05 Y 0.95 ) 2 o 3 Transparent ceramic powder

[0036] Rare earth nitric acid solution is prepared in the ratio of n(Nd):n(Y)=0.05:0.95, the concentration is 0.05mol / L, adopting the polytetrafluoroethylene nozzle of 0.1mm in the situation that stirring rate is 300r / min The mixed solution of 10.0mol / L ammonium bicarbonate and ammonia water is sprayed into the yttrium nitrate solution, the molar concentration ratio of ammonium bicarbonate and ammonia water is 1:5, the pressure of the air compressor is 100KPa, and the liquid supply rate of the peristaltic pump is 2ml / min. 3-stage air filter, adjust pH to 7.

[0037] Stirring was continued for 10 minutes after sparging had ended. The resulting solution was statically aged at room temperature for 12 h. Suction filtration after aging, the suction filtration speed is 50ml / min, to obtain the precursor, the precursor is washed 5 times with deionized water, and 4 times with absolute ethanol to fully remov...

Embodiment 3

[0039] Embodiment 3: (Ho 0.15 Y 0.85 ) 2 o 3 Transparent ceramic powder

[0040] Rare earth nitric acid solution is prepared in the ratio of n(Ho):n(Y)=0.15:0.85, and concentration is 5.0mol / L, adopts the polytetrafluoroethylene nozzle of 1.0mm to be 600r / min under the situation of stirring speed The mixed solution of 0.05mol / L ammonium bicarbonate and ammonia water is sprayed into the yttrium nitrate solution, the molar concentration ratio of ammonium bicarbonate and ammonia water is 2:1, the pressure of the air compressor is 800KPa, and the liquid supply rate of the peristaltic pump is 20ml / min. 5-stage air filter, adjust pH to 9.

[0041] Stirring was continued for 10 minutes after sparging had ended. The resulting solution was statically aged at room temperature for 48 h. Suction filtration after aging, the suction filtration speed is 80ml / min, to obtain the precursor, wash the precursor 4 times with deionized water, wash 5 times with absolute ethanol, in order to fu...

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Abstract

The present invention relates to a spray coprecipitation method for preparation of a Y2O3 based transparent ceramic powder. The method is as below: first preparing a rare earth ion (including Y<3+> and RE<3+>) nitrate solution and a compound precipitating agent solution containing aqueous ammonia and ammonium bicarbonate; then injecting the precipitating agent solution into the rare earth ion nitrate solution in a spray way, and terminating the co-precipitation process when the pH value is at 7-9; finally, standing, aging, adding deionized absolute ethyl alcohol, conducting suction filtration, drying and calcining to obtain a nano nearly spherical Y2O3 based transparent ceramic powder. The Y2O3 based transparent ceramic powder prepared by the method provided by the present invention has small particles, uniform particle distribution, weak agglomeration, particle size of 80-150nm and excellent powder molding. The method is very applicable to (semi) industrial production of Y2O3 based transparent ceramic material.

Description

technical field [0001] The present invention relates to a Y 2 o 3 The preparation method of spray co-precipitation of base transparent ceramic powder, more precisely, is to use spray co-precipitation to prepare particles with small particle size, uniform particle size distribution, high chemical purity and good dispersibility. 2 o 3 The invention relates to transparent ceramic powder, which belongs to the technical field of preparation and application of nanometer powder. Background technique [0002] Since the invention of laser technology in the 1960s, it has quickly gained important applications in many fields such as communications, materials, military, medical and scientific research. Lasers can be divided into gas lasers, liquid lasers, semiconductor lasers and solid-state lasers according to their working medium. Due to the advantages of simple structure, small size and high output power, solid-state lasers have achieved rapid development. The gain medium is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505
CPCC04B35/505C04B2235/3224C04B2235/5445C04B2235/5454C04B2235/9653
Inventor 张乐李正杨浩陈浩王骋乔学斌唐定远沈德元
Owner XUZHOU NORMAL UNIVERSITY
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