Amorphous material with equal atom mol ratio and preparation method thereof

A technology of amorphous materials and equimolar ratio, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve problems such as unfavorable amorphous formation, affecting amorphous properties, difficult sample vitrification, etc., to promote amorphous Formation of crystals, maintenance of purity, and ease of operation

Active Publication Date: 2018-10-26
NORTHEASTERN UNIV
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Problems solved by technology

[0004] In the prior art, the process of preparing amorphous crystals needs to be heated in a container and then rapidly cooled to form. The cooling process will form heterogeneous nucleation due to contact with the container, which is not conducive to the formation of amorphous crystals and will also affect the final formation. Amorphous properties
In addition, the four oxides of lanthanum trioxide, tit

Method used

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  • Amorphous material with equal atom mol ratio and preparation method thereof
  • Amorphous material with equal atom mol ratio and preparation method thereof

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[0035] Example

[0036] An equimolar mixed oxide amorphous, is composed of lanthanum trioxide (La 2 O 3 ), titanium dioxide (TiO 2 ), niobium pentoxide (Nb 2 O 5 ), tungsten oxide (WO 3 ) amorphous formed by four oxides, the atomic molar ratio is: La: 25%, Ti: 25%, Nb: 25%, W: 25%.

[0037] The lanthanum trioxide (La 2 O 3 ) is 4N, titanium dioxide (TiO 2 ) purity is 3N, niobium pentoxide (Nb 2 O 5 ) is 4N, tungsten oxide (WO 3 ) was 3N pure.

[0038] A kind of preparation method of equimolar ratio mixed oxide amorphous, the concrete steps are as follows:

[0039] Step 1, Solid Phase Synthesis:

[0040] (1) According to the atomic molar ratio of La: 25%, Ti: 25%, Nb: 25%, W: 25%, LaO 3 / 2 (La 2 O 3 ), TiO 2 , NbO 5 / 2 (Nb 2 O 5 ), WO 3 Mixing, and adding anhydrous ethanol, the anhydrous ethanol should not pass the powder wet grinding for 3h to obtain mixed powder;

[0041] (2) Dry the mixed powder at 80°C for 20min, then pass through a sieve, and grind the ...

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Abstract

The invention provides an amorphous material with an equal atom mol ratio and a preparation method thereof and belongs to the technical field of preparation of amorphous materials. The amorphous material is prepared from four types of oxide including lanthanum trioxide, titanium dioxide, niobium pentoxide and tungsten oxide and the atom mol ratio is as follows: La accounts for 25 percent, Ti accounts for 25 percent, Nb accounts for 25 percent and W accounts for 25 percent; the preparation method comprises the following steps: 1) mixing the raw materials according to the equal atom mol ratio; drying, pre-firing and carrying out tabletting to prepare a mixed oxide blank; 2) putting the block-shaped blank into a laser suspension furnace and melting a block through laser; then rapidly coolingto room temperature. According to the amorphous material provided by the invention, oxide mixed powder is suspended in the air in a melting, rapid cooling and condensation process and is not in contact with any container; in a cooling process, no heterogeneous nucleation is formed, so that the formation of the amorphous material is facilitated; impurity elements cannot be introduced and the purityof the amorphous material is kept.

Description

technical field [0001] The invention belongs to the technical field of preparation of amorphous materials, and in particular relates to an amorphous material with an atomic equimolar ratio and a preparation method thereof. Background technique [0002] Amorphous has short-range order, long-range disorder, and isotropy. It has many physical, chemical, and electromagnetic properties superior to crystals. It has broad application prospects in information, energy, biology, precision machines, and aerospace. It has attracted extensive attention of researchers at home and abroad. [0003] A liquid substance in a high-energy state will tend to a low-energy stable equilibrium crystalline state as the temperature decreases or the pressure increases. There will be many thermodynamic metastable phases between the liquid state and the crystalline state, including metastable phases of different energy states In the amorphous phase, as the energy gradually decreases, the structure of the...

Claims

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Application Information

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IPC IPC(8): C01G41/00
CPCC01G41/006C01P2002/72
Inventor 齐西伟张津榕张晓燕
Owner NORTHEASTERN UNIV
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