Hydrothermal method for preparing HfO2 nano-particles

A nanoparticle and hydrothermal technology, which is applied in the field of preparation of HfO2 nanomaterials, can solve the problems of lack of performance powder, large particle size, low doping degree, etc., and achieves good application prospects, narrow particle size distribution, good repeatability

Inactive Publication Date: 2016-09-21
DONGHUA UNIV +1
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  • Application Information

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Problems solved by technology

Liu Jianqiang [Liu Jianqiang et al., National Natural Science Foundation of China, 2004, 6(35): 730-733] and others synthesized HfO by high-temperature solid-phase method 2 Nano-powder, high-temperature solid-phase synthesis method is a traditional met

Method used

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  • Hydrothermal method for preparing HfO2 nano-particles
  • Hydrothermal method for preparing HfO2 nano-particles
  • Hydrothermal method for preparing HfO2 nano-particles

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1. Weigh 0.16g of hafnium tetrachloride and dissolve it in 8mL of deionized water to obtain hafnium oxychloride solution;

[0029] 2. Weigh 0.08g of sodium hydroxide, dissolve it in 10mL of deionized water at room temperature, and add the sodium hydroxide solution to the above solution with a rubber dropper to obtain a precursor solution;

[0030] 3. Weigh 0.3707g of dodecylamine, dissolve it in 2mL of ethanol, mix the obtained solution with the above precursor solution, and stir magnetically at room temperature for 2 hours to obtain a uniformly mixed solution;

[0031] 4. Transfer the mixed solution into a 100ml polytetrafluoroethylene-lined stainless steel high-pressure hydrothermal kettle, keep it warm at 160°C for 24 hours, wait for the hydrothermal kettle to cool down to room temperature, and centrifuge the obtained mixed solution to obtain a precipitate, deionized water and Wash with absolute ethanol three times respectively, and dry in an oven at 60°C for 12 hour...

Embodiment 2

[0033] 1. Weigh 0.16g of hafnium tetrachloride and dissolve it in 10mL of deionized water to obtain hafnium oxychloride solution;

[0034] 2. Weigh 0.08g of sodium hydroxide, dissolve it in 10mL of deionized water at room temperature, and add the sodium hydroxide solution to the above solution with a rubber dropper to obtain a precursor solution;

[0035] 3. Transfer the mixed solution into a 100ml polytetrafluoroethylene-lined stainless steel high-pressure hydrothermal kettle, keep it warm at 160°C for 24 hours, wait for the hydrothermal kettle to cool down to room temperature, and centrifuge the obtained mixed solution to obtain a precipitate, deionized water and Wash with absolute ethanol three times respectively, and dry in an oven at 60°C for 12 hours.

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Abstract

The invention relates to a hydrothermal method for preparing HfO2 nano-particles. According to the invention, hafnium tetrachloride is dissolved in water, such that a hafnium oxychloride solution is obtained; a sodium hydroxide solution is dropped into the hafnium oxychloride solution, such that a precursor solution is obtained; dodecylamine is dissolved in a solvent, such that a dodecylamine solution is obtained; the dodecylamine solution is mixed with the above precursor solution, and the mixture is subjected to normal-temperature magnetic stirring, such that a mixed solution is carried out; a hydrothermal reaction is carried out; and separation, washing and drying are carried out, such that the nano-particles are obtained. The method provided by the invention is simple and convenient, and has good repeatability low cost. The method can be used in mass production. The prepared HfO2 nano-particles have uniform particle size distribution, and have a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of HfO2 nanomaterials, in particular to a method for preparing HfO by hydrothermal method 2 nanoparticle approach. Background technique [0002] HfO 2 It has a high dielectric constant (the dielectric constant of the bulk material is 25, and the film material is about 20.25), a large band gap (~5.79eV), a high reflection coefficient (~2.9), a high refractive index (1.82 ~1.93) and resistance to laser damage threshold, excellent chemical stability and biocompatibility. Based on the above excellent properties, HfO 2 It has broad application prospects in the fields of MOS gate dielectric layer, optical coating, organic catalysis, solid electrolyte and biomedicine. [0003] Ananthakumar Ramadoss et al prepared spherical HfO with a size of about 20 nm by heating or ultrasound-assisted sol-gel method 2 nanoparticles, but the resulting nanoparticles agglomerate severely. The sol-gel method is a powder ma...

Claims

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Application Information

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IPC IPC(8): C01G27/02B82Y30/00
CPCB82Y30/00C01G27/02C01P2002/72C01P2002/84C01P2004/04C01P2004/64
Inventor 周兴平万盈盈
Owner DONGHUA UNIV
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