Preparation method of nanometer magnesia

A technology of nano-magnesium oxide and magnesium salt, which is applied in the direction of magnesium oxide, nanotechnology, nanotechnology, etc., can solve the problems of unfavorable promotion and utilization of nano-magnesia, poor agglomeration and purity, and poor performance of nanomaterials, and achieve favorable Effect of application and promotion, improvement of purity and dispersibility, performance improvement

Inactive Publication Date: 2015-07-01
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high-temperature calcination method has a lot of impurities in the ore, which consumes a lot of energy to remove it, which is not conducive to the preparation of high-purity products; the precipitation method mostly uses water as a solvent, but due to hydroxyl or capillary action, th

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  • Preparation method of nanometer magnesia

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Embodiment 1

[0042] A preparation method of nano magnesium oxide, said method comprising the following steps:

[0043] 1) Weigh 11g of magnesium chloride hexahydrate, dissolve it in 100ml of ethylene glycol, and keep stirring to make it a transparent solution;

[0044] 2) Weigh 16g of urea, add it to the transparent solution, stir, and dissolve to obtain a mixed solution;

[0045] 3) Heat and stir the mixed solution under reflux, raise the temperature to 110° C., and react for 8 hours;

[0046] 4) After the reaction is completed, the resulting solution is cooled and aged for 10 hours;

[0047] 5) Dilute the solution obtained in step 4) with deionized water, filter with suction, wash the obtained precipitate twice with deionized water, and once with absolute ethanol to obtain a white precipitate, which is dried at 80°C for 4 hours, Cool to room temperature to obtain a white solid, which is calcined in a muffle furnace at 500°C for 3 hours to obtain nano-magnesia.

[0048] The nano magnes...

Embodiment 2

[0050] A preparation method of nano magnesium oxide, said method comprising the following steps:

[0051] 1) Weigh 11g of magnesium chloride hexahydrate, dissolve it in 100ml of ethylene glycol, and keep stirring to make it a transparent solution;

[0052] 2) Weigh 16g of ammonia water, add to the above-mentioned transparent solution, stir and dissolve to obtain a mixed solution;

[0053] 3) Heating and stirring the mixed solution under reflux, raising the temperature to 100° C., and reacting for 12 hours;

[0054] 4) After the reaction is completed, the resulting solution is cooled and aged for 10 hours;

[0055] 5) Dilute the solution obtained in step 4) with deionized water, filter with suction, wash the obtained precipitate twice with deionized water, and once with absolute ethanol to obtain a white precipitate, which is dried at 80°C for 4 hours, Cool to room temperature to obtain a white solid, which is calcined in a muffle furnace at 500°C for 3 hours to obtain nano-m...

Embodiment 3

[0058] A preparation method of nano magnesium oxide, said method comprising the following steps:

[0059] 1) Take by weighing 11g of magnesium chloride hexahydrate, dissolve in 100ml of glycerol, and keep stirring to make it a transparent solution;

[0060] 2) Weigh 16g of ammonium carbonate, add in the above-mentioned transparent solution, stir, and dissolve to obtain a mixed solution;

[0061] 3) Heating and stirring the mixed solution under reflux, raising the temperature to 120° C., and reacting for 8 hours;

[0062]4) After the reaction is completed, the resulting solution is cooled and aged for 8 hours;

[0063] 5) Dilute the solution obtained in step 4) with deionized water, filter with suction, wash the obtained precipitate twice with deionized water, and once with absolute ethanol to obtain a white precipitate, which is dried at 80°C for 4 hours, Cool to room temperature to obtain a white solid, which is calcined in a muffle furnace at 500°C for 3 hours to obtain na...

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Abstract

The invention discloses a preparation method of nanometer magnesia. The method comprises the following steps: (1) dissolving soluble magnesium salt into a polyhydric alcohol solution, and continuously stirring to form a transparent solution; (2) adding a precipitant to the transparent solution according to the mass ratio of the soluble magnesium salt to the precipitant being (1:2) to (1:8), stirring and completely dissolving the precipitant to obtain a mixed solution; (3) refluxing and heating the mixed solution, controlling the reaction temperature at 100-140 DEG C, and controlling the reaction time for 4-12 hours; (4) ending the reaction, cooling, standing and ageing for 0-10 hours; and (5) diluting the solution obtained from the step (4), filtering, washing a filter cake, drying and calcining to obtain the nanometer magnesia. The nanometer magnesia prepared by the method is good in dispersibility, and high in purity; the performance of a magnesia material is improved; and application and popularization of the nanometer magnesia material towards sophisticated industries are facilitated.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, in particular, the invention relates to a preparation method of nanometer magnesium oxide. Background technique [0002] Nano-magnesium oxide has the properties of magnesium oxide and nano-materials at the same time, and has very good application prospects in the fields of optoelectronics, advanced ceramics, catalysis, and medicine. At present, the methods for preparing nano-magnesia materials are mainly high-temperature calcination method and precipitation method. The high-temperature calcination method has a lot of impurities in the ore, and the energy consumption during removal is not conducive to the preparation of high-purity products; the precipitation method mostly uses water as a solvent, but due to hydroxyl or capillary action, the agglomeration phenomenon is serious. The main problem of the existing preparation of nano-magnesia nanomaterials is that it is pro...

Claims

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Application Information

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IPC IPC(8): C01F5/02B82Y30/00
Inventor 海春喜周园李松李翔申月任秀峰张丽娟年洪恩
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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