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A kind of preparation method of black translucent amorphous niobium pentoxide

A niobium pentoxide and amorphous technology, which is applied in the field of high-pressure preparation of functional materials, can solve problems such as difficulties, and achieve the effect of easy operation, simple operation process and good amorphous structure

Inactive Publication Date: 2019-05-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, amorphous materials have attracted great attention due to their excellent physical and chemical properties, and some of them have also been widely used. In the prior art, the preparation of amorphous Nb 2 o 5 The most common method is thermal oxidation (see "Photoluminescence of Amorphous Nb Oxide Nanofilms in the Visible Light Region", Tao Shufen et al., Acta Optics Sinica, 2009, 29(10): 2934-2937), so far, the Nb 2 o 5 It is still a challenging work to study the high-pressure phase transition and its light-transmitting properties under the amorphous structure
At the same time, since the high-pressure phase and amorphous structure of the material are obtained by using high-pressure technology, it is often accompanied by changes in its lattice structure and the reversibility of the phase transition of the sample after pressure relief. The nature of the phase appears to be particularly difficult
So far, there is no relevant monoclinic H-Nb phase at home and abroad. 2 o 5 Preparation of Amorphous and Translucent Amorphous Nb by High Pressure 2 o 5 related reports

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  • A kind of preparation method of black translucent amorphous niobium pentoxide
  • A kind of preparation method of black translucent amorphous niobium pentoxide
  • A kind of preparation method of black translucent amorphous niobium pentoxide

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preparation example Construction

[0032] The present invention provides a preparation method of black transparent amorphous niobium pentoxide, which comprises the following steps:

[0033] The monoclinic H-Nb 2 O 5 Press to 21.3~30.0GPa to obtain black transparent amorphous niobium pentoxide.

[0034] In the present invention, the monoclinic H-Nb 2 O 5 The purity is preferably greater than 99.9985%; the monoclinic H-Nb 2 O 5 The particle size of the powder is preferably 0.2 to 10 μm, more preferably 0.5 to 2 μm. According to the present invention, the monoclinic H-Nb 2 O 5 There is no special limitation on the source of, and it is sufficient to use commercially available products well known to those skilled in the art or products made by conventional technical means; in the embodiment of the present invention, it is preferably the monoclinic H-Nb produced by Alpha Company 2 O 5 .

[0035] In the present invention, the pressurized pressure is preferably 21.3 to 30.0 GPa, more preferably 23.0 to 25.6 GPa. The present ...

Embodiment 1

[0055] Pre-press T301 steel sheet (approximately 0.25mm×10mm×10mm) with an anvil surface of 400μm diamond anvil press at 17.5GPa, with an indentation thickness of 55μm, and drill a hole with a diameter of 140μm in the center of the indentation. Oblique phase H-Nb 2 O 5 The original material is filled into the hole of the steel sheet. After the hole is completely filled, the hole is the sample cavity. Then add 15μm ruby ​​microspheres as a pressure mark (check the pressure in the pressure cavity), then seal the press and apply 21.3GPa pressure , The obtained black transparent amorphous niobium pentoxide.

[0056] 21.3 Nb prepared under GPa pressure 2 O5, see the top light optical photo under 21.3GPa Figure 4 ,by figure 1 with Figure 4 It can be seen from the comparison that the raw material H-Nb 2 O 5 Change from white to black under 21.3GPa; see the bottom light optical photo under 21.3GPa Figure 5 ,by figure 2 with Figure 5 It can be seen from the comparison that when the pr...

Embodiment 2

[0059] Using a diamond anvil press with an anvil surface of 300 μm to pre-press T301 steel sheet at 18.5 GPa, the thickness of the indentation is 45 μm, and a hole with a diameter of 110 μm is drilled in the center of the indentation to convert the monoclinic H-Nb 2 O 5 The original material is filled into the hole of the steel sheet, and after the hole is completely filled, 10μm ruby ​​microspheres are added as a pressure mark (to detect the pressure in the pressure cavity), and then the press is sealed, and 30 GPa is applied to obtain a black transparent amorphous five. Niobium oxide.

[0060] Nb prepared under 30.0GPa pressure 2 O 5 , See the bottom light optical photo under 30.0GPa Picture 8 ,by Picture 8 It can be seen that when the pressure reaches 30.0GPa, the produced Nb 2 O 5 Has good light transmission properties.

[0061] Press 30.0GPa to produce black light-transmitting amorphous niobium pentoxide. Relieve pressure to 0GPa, and relieve pressure to Nb under 0GPa 2 O 5 P...

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Abstract

The invention provides a method for preparing black light-permeable amorphous niobium pentoxide. The method comprises the following step: pressurizing monoclinic-phase H-Nb2O5 to 21.3-30.0 GPa, thereby obtaining the black light-permeable amorphous niobium pentoxide. By virtue of a high-pressure treatment method, a black amorphous Nb2O5 material with good light permeability is prepared; at normal pressure, Nb2O5 can maintain a stable amorphous structure and good light permeability; the method is simple in operation process and easy to operate.

Description

Technical field [0001] The invention relates to the technical field of high-pressure preparation of functional materials, in particular to a preparation method of black transparent amorphous niobium pentoxide. Background technique [0002] Nb 2 O 5 It is an important industrial raw material. It can be used to pull nickel niobate single crystal to prepare special optical glass, high-frequency and low-frequency capacitors and piezoelectric ceramic components. It can also be used to produce ferroniobium and various niobium alloys required for special steel. Nb 2 O 5 It is a raw material for preparing niobium and its compounds, and is also used as a catalyst and refractory material. It has important application prospects in the chemical industry. [0003] In recent years, amorphous materials have attracted great attention due to their excellent physical and chemical properties. Some of these amorphous materials have also been widely used. In the prior art, amorphous Nb is prepared. 2 O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G33/00B01J3/06
CPCB01J3/062B01J2219/00819C01G33/00C01P2002/02C01P2002/70C01P2002/72C01P2004/01C01P2006/60
Inventor 李全军关洲张华芳刘冰冰
Owner JILIN UNIV
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