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Novel method for manufacturing nano gallium acid magnesium

A kind of gallium acid and nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems that cannot meet the actual needs, the precursors are difficult to wash, and easy to form hard agglomerates, so as to meet the needs of green production and avoid products The effect of sintering and short production cycle

Inactive Publication Date: 2008-01-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the advantages of high reactivity of the starting material, uniform mixing of components at the molecular scale, and the use of an organic medium with low surface tension can effectively prevent agglomeration; Washing, and high temperature calcination is required to form the required crystal phase. The obtained powder is easy to form hard agglomerates during the calcination process, thereby reducing the activity of the powder, which cannot meet the actual needs.

Method used

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  • Novel method for manufacturing nano gallium acid magnesium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 (with urea as organic fuel):

[0021] Put a heat-resistant crucible in the reaction furnace in advance, and raise the temperature of the reaction furnace to 550°C. Accurately weigh 2.1440g (0.01mol) of magnesium acetate, 6.1960g (0.02mol) of gallium nitrate, 3.0415g (0.038mol) of ammonium nitrate, and 2.1622g (0.036mol) of urea. Put the four raw materials into a mortar and grind until a uniform precursor paste is formed, then move the paste into a crucible in the reaction furnace and ignite it, and after burning for 15 seconds, nano-magnesium gallate powder is obtained. According to SEM and XRD analysis, the product is high-purity MgGa with particle size below 45nm 2 o 4 crystals.

Embodiment 2

[0022] Embodiment 2 (with citric acid as organic fuel):

[0023] Put a heat-resistant crucible in the reaction furnace in advance, and raise the temperature of the reaction furnace to 500°C. Accurately weigh 3.2160g (0.015mol) of magnesium acetate, 9.2939g (0.03mol) of gallium nitrate, 7.8039g (0.0975mol) of ammonium nitrate, and 4.7282g (0.0225mol) of citric acid. Put the four raw materials into a mortar and grind until a uniform precursor paste is formed, then move the paste into a crucible in the reaction furnace and ignite it, and after burning for 24 seconds, nano-magnesium gallate powder is obtained. According to SEM and XRD analysis, the product is high-purity MgGa with particle size below 50nm 2 o 4 crystals.

Embodiment 3

[0024] Embodiment 3 (using urea as organic fuel)

[0025] Put a heat-resistant crucible in the reaction furnace in advance, and raise the temperature of the reaction furnace to 400°C. Accurately weigh 2.1440g (0.01mol) of magnesium acetate, 6.1960g (0.02mol) of gallium nitrate, 4.9625g (0.062mol) of ammonium nitrate, and 2.6426g (0.044mol) of urea. Put the four raw materials into a mortar and grind until a uniform precursor paste is formed, then move the paste into a crucible in the reaction furnace and ignite it, and after burning for 20 seconds, nano-magnesium gallate powder is obtained. According to SEM and XRD analysis, the product is high-purity MgGa with particle size below 40nm 2 o 4 crystals.

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Abstract

A green production novel method which adopts the violent redox reaction between the metal nitrate and the acetate as well as the organic fuel to prepare the nano magnesium gallate is provided. The magnesium acetate, the gallium nitrate, the ammonium nitrate and the organic fuel are evenly grinded into the precursor paste and are moved to the reactor and are lit; the precursor paste continuously burns to gain nano magnesium gallate powder. The method has lower operation temperature than that of the traditional method, fast reaction rate, controllable stoichiometry, small crystal grain size and high product quality, which avoids the product sintering caused by high temperature calcinations and the environment protection, thereby is a green production novel method which can meet the demand of the high-tech industries and has high practicability.

Description

Technical field: [0001] The invention relates to a method for preparing nano-magnesium gallate, in particular to a new method for synthesizing nano-magnesium gallate through violent redox reactions between metal nitrates, acetates and organic fuels. Background technique: [0002] Magnesium gallate is a phosphor material with a spinel structure, and can be used as a host material to be doped with metal ions. of which MgGa 2 o 4 :Ni 2+ Can be used as near-infrared tunable laser material; MgGa 2 o 4 :Mn 2+ It emits blue-green fluorescence under ultraviolet light, and is mainly used to make colored fluorescent lamps; MgGa 2-X mn X o 4 Can be used as negative temperature coefficient type thermistor material; MgGa 2 o 4 :Co 2+ It is an electro-optical Q-switch or solid-state laser material; while an electrostatic copy lamp uses magnesium gallate (MgGa 2 o 4 :Mn) and other ultraviolet phosphors. [0003] The existing synthetic methods of magnesium gallate mainly inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00C01F5/00B82B3/00
Inventor 吕海亮杜吉勇班青邢存章马毅
Owner QILU UNIV OF TECH
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