Continuous method for preparing high dispersion nano oxide powder by jet coprecipitation

A nano-oxide, high-dispersion technology, applied in the production field of nano-powder preparation, can solve problems such as uneven distribution of metal ions and precursors, difficulty in measuring the pH value of the reaction solution, uneven distribution of precursors, etc., to achieve cost Low, high yield, low equipment requirements

Pending Publication Date: 2017-07-25
XUZHOU NORMAL UNIVERSITY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] In order to effectively solve the problems of uneven distribution of metal ions and precursors participating in the reaction in the process of preparing transparent ceramic oxide powders, difficulty in measuring the pH value of the reaction solution, and inability to realize continuous production, the present invention designs and realizes the preparation of spray co-precipitation Continuous Process for Nano Oxide Powders
During the experiment, experimental devices such as air compressors, pressure reducing valves, filters, pumps, nozzles, single-chip microcomputers, pH testers, stirrers, and ceramic filter membranes were used. This method can effectively solve the process of preparing nano-oxide powders. Problems such as uneven distribution of precursors and powder agglomeration in the medium have greatly improved the degree of automation in the reaction process, realized continuous precipitation process and solid-liquid separation, and the equipment is simple, efficient, process controllable, and high yield

Method used

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  • Continuous method for preparing high dispersion nano oxide powder by jet coprecipitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Y 2 o 3 Transparent ceramic powder

[0022] Preparation concentration is the yttrium nitrate solution of 3.0mol / L, is contained in container two (16), and preparation concentration is the ammonium bicarbonate of 1.5mol / L and ammoniacal liquor as precipitation agent solution (6), the mole of ammonium bicarbonate and ammoniacal liquor The concentration ratio is 1:2, and it is contained in container one (5). The experimenter turns on the air compressor (2), the pressure of the air compressor is 300KPa, the air compressor (2) works, the air enters the continuous device (1), and the air flows into the pressure relief valve (3) from the conduit, and the pressure relief valve (3) will The pressure is adjusted to an appropriate size, and the air flows into the four-stage filter (4) and the T-type transfer valve (8), wherein the filter (4) filters out impurities in the air. Pump one (7) inhales the precipitating agent (6) (ammonium bicarbonate and ammoniacal liquor...

Embodiment 2

[0025] Embodiment 2: YAG transparent ceramic powder

[0026] Prepare an aluminum nitrate solution in the ratio of n(Al):n(Y)=5:3, the concentration is 1.0mol / L, put it in the container two (16), configure the ammonium bicarbonate solution as the precipitating agent (6), carbonic acid The concentration of ammonium hydrogen is 1.92mol / L, which is contained in container one (5); the experimenter turns on the air compressor (2), the pressure of the air compressor is 100KPa, the air compressor (2) works, and the air enters the continuous device (1), The air flows into the pressure reducing valve (3) from the conduit, the pressure reducing valve (3) adjusts the pressure to an appropriate size, and the air flows into the fourth-stage filter (4) and the T-type transfer valve (8), wherein the filter (4) Filter out impurities in the air. Pump one (7) sucks the precipitating agent (6) in container one (5) at a rate of 10ml / min, and the precipitating agent (6) flows through the T-shaped ...

Embodiment 3

[0029] Embodiment 3: Al2O3 transparent ceramic powder

[0030] The experimenter prepares an aluminum nitrate solution with a concentration of 0.1mol / L, and puts it in a container two (16), and prepares an ammonium bicarbonate solution with a concentration of 1.5mol / L as a precipitant solution (6), and puts it in a container one (5). Inside. The experimenter turns on the air compressor (2), the pressure of the air compressor is 500KPa, the air compressor (2) works, the air enters the continuous device (1), and the air flows into the pressure relief valve (3) from the conduit, and the pressure relief valve (3) will The pressure is adjusted to an appropriate size, and the air flows into the four-stage filter (4) and the T-type transfer valve (8), wherein the filter (4) filters out impurities in the air. Pump one (7) inhales the precipitant (6) (ammonium bicarbonate solution) in container one (5) at a rate of 20ml / min, and the precipitant (6) flows through the T-type transfer val...

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Abstract

The invention discloses a continuous method for preparing high dispersion nano oxide powder by jet coprecipitation, and the method is characterized in that: in the precipitation process, drying process and calcination process of nano oxide powder preparation, by use of a jet coprecipitation continuous device (1), precursor continuous preparation and solid-liquid separation can be realized. The method can effectively solve the problems of uneven precursor distribution and powder aggregation and the like during the preparation of the nano oxide powder, and greatly improves the automation degree in the reaction process, the continuous precipitation process and solid liquid separation are realized, and the method has the advantages of simple equipment, high efficiency, controllable process and high yield.

Description

technical field [0001] The invention relates to a continuous method for preparing high-dispersion nano oxide powder by jet co-precipitation, and belongs to the production technical field of nano powder preparation. Background technique [0002] Transparent ceramics have the properties of ordinary ceramics and also have light transmission properties, which makes transparent ceramics naturally possess more superior properties and have a broader application prospect. Now it has been widely used in window materials, laser materials, inorganic scintillation materials, optoelectronic materials, transparent armor and fluorescent ceramics and other fields. A series of transparent ceramics such as alumina, yttrium oxide, magnesium oxide, spinel and YAG have been prepared. The higher sintering activity in the preparation process of transparent ceramic powder has a significant impact on the transmittance of transparent ceramics. At the same time, to obtain transparent ceramics with h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/44C04B35/10C04B35/01
CPCC04B35/01C04B35/10C04B35/44C04B35/505C04B2235/5445C04B2235/5454C04B2235/9653
Inventor 张乐蒋志刚李正魏帅高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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