Ultrafine zirconia nanosphere and preparation method thereof

A technology of ultra-fine zirconia and nanospheres, applied in zirconia, nanotechnology, etc., can solve the problems of low output rate, complex synthesis reaction, long reaction time, etc., and achieve good crystallinity, high specific surface area, and chemical properties lively effect

Inactive Publication Date: 2018-08-31
UNIV OF JINAN
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of complicated synthetic reaction, long reaction time, and low output rate in preparing zirconia in the prior art, the present invention provides an ultrafine zirconia nanosphere and a preparation method thereof, the method is simple and easy to control, and does not require high pressure Reactor and other high-pressure equipment can observe the product state during the preparation process at any time, and the synthesis process requires a short time, high output rate, and no by-product pollution

Method used

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  • Ultrafine zirconia nanosphere and preparation method thereof
  • Ultrafine zirconia nanosphere and preparation method thereof
  • Ultrafine zirconia nanosphere and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0029] (1) Mix pure cerium, pure aluminum, pure copper, and pure zirconium according to the atomic ratio of 65:10:20:5, use argon (pressure 0.5MPa) atmosphere protection, and arc smelt 3 times until the composition of the mother ingot is uniform Finally, a cerium-aluminum-copper-zirconium alloy master ingot is obtained; the above-mentioned alloy master ingot is processed by a single-roller spin quenching system, and the rotational speed of the copper roller is set in the range of 1200-1700r / min to obtain a thickness between 35μm-60μm and a width of The thin strip between 2.7-4.0mm, its X-ray diffraction analysis pattern is as follows figure 1 As shown in 1# in the middle: 1# presents a broad diffraction "steamed bread peak", which is a typical amorphous diffuse peak, indicating that the obtained thin band is an amorphous thin band;

[0030] (2) Weigh 0.25 g of the thin strip obtained in step (1), cut it into small pieces, place it in 100 mL of nitric acid solution with a conce...

Embodiment 2

[0033] (1) Mix pure cerium, pure copper, zirconium-aluminum alloy (the mass percentage of aluminum is 20.5%) according to the atomic ratio of cerium, aluminum, copper and zirconium 55:13:17:15, and use argon gas (pressure 0.5 MPa) atmosphere protection, arc melting 4 times, after the composition of the mother ingot is uniform, the cerium-aluminum-copper-zirconium alloy master ingot is obtained; the above alloy master ingot is processed by a single-roller rotary quenching system, and the copper roller speed is set at 1500-2000r In the range of / min, a thin strip with a thickness between 25μm-55μm and a width between 2.5-3.7mm is obtained, and its X-ray diffraction analysis pattern is as follows figure 1 As shown in 2#: 2# presents a broad diffraction "steamed bread peak", which is a typical amorphous diffuse peak, indicating that the obtained thin band is an amorphous thin band;

[0034] (2) Weigh 0.25 g of the thin strip obtained in step (1), cut it into small pieces, place it...

Embodiment 3

[0037](1) Cerium, copper-aluminum alloy (where the mass percentage of aluminum is 9.0%), zirconium-aluminum alloy (wherein the mass percentage of aluminum is 10.0%) is cerium, aluminum, copper, zirconium atomic ratio 40:15:15:30 Proportional mixing, using argon (pressure 0.5MPa) atmosphere protection, arc melting 5 times, after the composition of the mother ingot is uniform, the cerium-aluminum-copper-zirconium alloy mother ingot is obtained; the above alloy mother ingot is processed by a single-roller spin quenching system , the speed of the copper roller is set in the range of 2000-2500r / min, and a thin strip with a thickness of 25μm-60μm and a width of 2.7-3.9mm is obtained, and its X-ray diffraction analysis pattern is as follows figure 1 As shown in 3#: 3# presents a broad diffraction "steamed bread peak", which is a typical amorphous diffuse peak, indicating that the obtained thin band is an amorphous thin band;

[0038] (2) Weigh 0.25 g of the thin strip obtained in ste...

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Abstract

The invention provides a preparation method of an ultrafine zirconia nanosphere. The method includes the steps of conducting melt spin quenching treatment on a cerium-aluminum-copper-zirconium alloy female ingot to prepare an amorphous thin strip; conducting dealloyed corrosion with nitric acid on the amorphous thin strip to obtain a dealloyed product; washing and drying the dealloyed product to obtain the ultrafine zirconia nanosphere. The cerium-aluminum-copper-zirconium alloy female ingot comprises, by atomic percentage, 40-65% of cerium, 5-10% of aluminum, 15-25% of copper and 5-35% of zirconium. According to the preparation method, the amorphous thin strip obtained by melt spin quenching is adopted as a precursor, so that the structural uniformity is ensured, and the product quality can be effectively improved. Cerium-aluminum-copper-zirconium amorphous alloy is selected as a precursor, other elements other than zirconium in the precursor can affect the precursor structure and correspondingly change the structure and shape of a synthesized material. The ultrafine zirconia nanosphere prepared by the method is in a regular spherical shape, regular in shape, good in crystallinity, uniform and controllable in size and has a high specific surface area.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to the synthesis technology of transition metal oxides, in particular to a preparation method of ultrafine zirconia nanospheres. Background technique [0002] Transition metal oxides refer to a series of materials containing transition metals and oxygen. The same transition metal oxide can have multiple physical properties at the same time, such as ferroelectricity, ferromagnetism, superconductor, pyroelectric effect, semiconductor, photoelectric effect, piezoelectric effect and so on. [0003] Zirconia is chemically inactive and has the characteristics of high melting point, high boiling point, high hardness, high resistivity, high refractive index and low thermal expansion coefficient. It is an insulator at normal temperature, but has excellent properties such as electrical conductivity at high temperature. Since the 1920s, it has been used as a refractory mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02B82Y40/00
Inventor 左敏董宇李嘉赵德刚滕新营王艳
Owner UNIV OF JINAN
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