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Process for producing Mn doping SnO2 room temperature diluted magnetic semiconductor nano-powder

A technology of dilute magnetic semiconductors and nanopowders, applied in the field of new semiconductor spintronics materials, can solve the problems of non-preparation, etc., and achieve the effects of low-cost equipment, easy control of chemical ratio, and simple operation

Inactive Publication Date: 2009-09-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the inability to prepare Mn-doped SnO with room temperature ferromagnetism in the prior art 2 nanopowders, providing a Mn-doped SnO 2 A method for preparing temperature-diluted magnetic semiconductor nanometer rice powder, which can prepare Mn-doped SnO with room temperature ferromagnetism 2 Nano powder

Method used

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  • Process for producing Mn doping SnO2 room temperature diluted magnetic semiconductor nano-powder
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  • Process for producing Mn doping SnO2 room temperature diluted magnetic semiconductor nano-powder

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Embodiment 1

[0021] Utilize the present invention to prepare Sn annealed at 450°C 1-x mn x o 2 (x=0.03) Nanopowder. The first step, weighing 0.03mol analytically pure stannous chloride, under ultrasonic dispersion, be dissolved in dilute hydrochloric acid absolute ethanol solution, then add 0.00093mol manganese acetate, obtain mixed solution, wherein Mn 2+ and Sn 2 + The molar ratio of ions is 1:99, while adding absolute ethanol to adjust the Sn 2+ The molar concentration of ammonium bicarbonate is 0.1mol / L; weigh 0.07mol ammonium bicarbonate and add it to 70mL absolute ethanol to obtain ammonium bicarbonate absolute ethanol solution, configure 0.5mol / L ammonium bicarbonate absolute ethanol solution, ammonium bicarbonate is excessive 10%. In the second step, under the conditions of ultrasonic dispersion and 60°C water bath, ammonium bicarbonate absolute ethanol solution was added to the mixed solution while stirring continuously, and then ammonia water was added dropwise to adjust pH...

Embodiment 2

[0023] Utilize the present invention to prepare Sn annealed at 450°C 1-x mn x o 2 (x=0.05) Nanopowder. The first step, weighing 0.03mol analytically pure stannous chloride, under ultrasonic dispersion, be dissolved in dilute hydrochloric acid absolute ethanol solution, then add 0.00156mol manganese acetate, obtain mixed solution, wherein Mn 2+ and Sn 2 + The molar ratio of ions is 1:99, while adding absolute ethanol to adjust the Sn 2+ The molar concentration of ammonium bicarbonate is 0.1mol / L; weigh 0.07mol ammonium bicarbonate and add it to 70mL absolute ethanol to obtain ammonium bicarbonate absolute ethanol solution, configure 0.5mol / L ammonium bicarbonate absolute ethanol solution, ammonium bicarbonate is excessive 10%. In the second step, under the conditions of ultrasonic dispersion and 60°C water bath, ammonium bicarbonate absolute ethanol solution was added to the mixed solution while stirring continuously, and then ammonia water was added dropwise to adjust pH...

Embodiment 3

[0025] Utilize the present invention to prepare Sn annealed at 550°C 1-x mn x o 2 (x=0.03) Nanopowder. The first step, weighing 0.03mol analytically pure stannous chloride, under ultrasonic dispersion, be dissolved in dilute hydrochloric acid absolute ethanol solution, then add 0.00093mol manganese acetate, obtain mixed solution, wherein Mn 2+ and Sn 2 + The molar ratio of ions is 4:87, while adding absolute ethanol to adjust the Sn 2+ The molar concentration of ammonium bicarbonate is 0.2mol / L; Weigh 0.07mol ammonium bicarbonate and add it to 70mL absolute ethanol to obtain ammonium bicarbonate absolute ethanol solution, configure 1mol / L ammonium bicarbonate absolute ethanol solution, ammonium bicarbonate excess 20 %. In the second step, under the conditions of ultrasonic dispersion and 60°C water bath, ammonium bicarbonate absolute ethanol solution was added to the mixed solution while stirring continuously, and then ammonia water was added dropwise to adjust the pH to...

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Abstract

A kind of Mn-doped SnO The preparation method of dilute magnetic semiconductor nanometer powder at room temperature adopts chemical precipitation method, and its preparation method comprises: A. prepare the mixed solution of stannous chloride and manganese acetate and ammonium bicarbonate dehydrated alcohol solution; B. Under the conditions of ultrasonic dispersion and water bath, mix the above solutions; C. Age the solution obtained in the previous step, filter the obtained precipitate, wash it with deionized water several times until the pH of the solution is neutral, and dry the obtained precipitate in an oven , grinding to obtain the original powder; D. annealing the original powder in air to obtain Mn-doped SnO2 room temperature dilute magnetic semiconductor nanopowder. The invention can prepare Mn-doped SnO2 nanometer powder with room temperature ferromagnetism at low temperature.

Description

technical field [0001] The invention belongs to the field of novel semiconductor spintronics materials, in particular to a transition metal doped SnO 2 Preparation method of room temperature dilute magnetic semiconductor nanopowder. Background technique [0002] Dilute magnetic semiconductor refers to a new type of semiconductor formed by replacing non-magnetic metal ions with magnetic transition metal ions or rare earth metal ions in compound semiconductors such as III-V and II-VI. Diluted magnetic semiconductors utilize the charge and spin properties of electrons at the same time, and have excellent magnetic, magneto-optical and magnetoelectric properties, making them show broad application prospects in the field of "spintronics" and become the future of spintronic devices. Key materials are receiving great attention from all over the world. [0003] From the application point of view, it is very important to prepare dilute magnetic semiconductor materials with room temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 袁松柳田召明王永强何惊华
Owner HUAZHONG UNIV OF SCI & TECH
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