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

A technology of dilute magnetic semiconductor and nano-powder is applied in the field of new semiconductor spintronic materials, which can solve the problems of inability to prepare, and achieve the effects of low equipment, easy control of chemical ratio and short cycle.

Inactive Publication Date: 2008-07-16
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
  • Process for producing Mn doping SnO2 room temperature diluted magnetic semiconductor nano-powder

Examples

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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 is at 0.1mol / L; Weigh 0.07mol ammonium bicarbonate and add it to 70mL of absolute ethanol to obtain an anhydrous ethanol solution of ammonium bicarbonate. 10%. In the second step, under the condition of ultrasonic dispersion and water bath at 60°C, add ammonium bicarbonate absolute ethanol solution to the mixed solution while stirring continuously, then add ammonia water dropwise, adjust pH=9, and continue ultrasonic dispersion for 30 minutes. In the third step, the solution obtained in the previous step is aged, the...

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 is at 0.1mol / L; Weigh 0.07mol ammonium bicarbonate and add it to 70mL of absolute ethanol to obtain an anhydrous ethanol solution of ammonium bicarbonate. 10%. In the second step, under the condition of ultrasonic dispersion and water bath at 60°C, the 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 9, and the ultrasonic dispersion was continued for 30 minutes. The third step is to age the solutio...

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 is at 0.2mol / L; Weigh 0.07mol of ammonium bicarbonate and add it to 70mL of absolute ethanol to obtain an anhydrous ethanol solution of ammonium bicarbonate, configure 1mol / L of anhydrous ethanol solution of ammonium bicarbonate, and the excess of ammonium bicarbonate is 20 %. In the second step, under the condition of ultrasonic dispersion and water bath at 60°C, the ammonium bicarbonate absolute ethanol solution was added to the mixed solution while stirring continuously, and then ammonia water was added dropwise to...

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Abstract

The invention relates to a preparation method for nano-powder of room temperature dilute magnetic semiconductor of Mn dozed SnO2, which is produced by adopting chemical precipitation method. The preparation method comprises that: A. Mixed solution of stannous chloride and manganese acetate and anhydrous ethyl alcohol solution of ammonium hydrogencarbonate are prepared first; B. under the condition of ultrasonic vibration and water bath, the mixed solution of stannous chloride and manganese acetate and anhydrous ethyl alcohol solution of ammonium hydrogencarbonate are mixed; C. the obtained solution is aged, deposited, filtrated and washed by deionized water for many times until the pH value of the solution is 7, to get settlement dried in a drying oven and ground to obtain primary powder; D. anneal treatment is carried out to the primary powder in the air; therefore, the nano-powder of room temperature dilute magnetic semiconductor of Mn dozed SnO2 is obtained. The invention can prepare room temperature ferromagnetism and Mn dosed SnO2 nano powder in the condition of 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] Diluted magnetic semiconductor refers to a new type of semiconductor formed by replacing non-magnetic metal ions with magnetic transition metal ions or rare 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 temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(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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