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Tungsten bronze with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as preparation method and application of tungsten bronze

A tungsten bronze and heteroatom technology, which is applied to tungsten bronze with substitutional heteroatoms at lattice sites of tungsten and oxygen, and its preparation and application fields, can solve harsh preparation conditions and increase the technical requirements of hydrothermal equipment for tungsten bronze powder. problems such as preparation cost, to achieve the effect of reducing preparation cost, improving conductivity and transparent heat insulation properties, and mild preparation conditions

Active Publication Date: 2013-12-18
HEBEI TIANBO CONSTR TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes different ways to make ceramics that have improved thermal performance compared to regular materials like metal oxide or silicate glass. These improvements include increased transparency, resistance against electrical current flow, better light transmission due to high refractance index difference between metals, reduction of costs associated with raw materials production processes such as sintering, machining, polishing, etchings, and chemical vapor deposition methods. Additionally, this new type of ceramic may exhibit specific characteristics depending upon its composition and structure.

Problems solved by technology

This patents describes various methods for creating opaque coatings made of ceramics called thin films. These techniques involve depositing layers onto surfaces like windows during manufacturing processes, allowing them to block out certain colors without being affected by other colored objects. Additionally, these techniques allow for control over how much radiation passes through the window opening when transmitting electromagnetic waves within specific spectral ranges.

Method used

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  • Tungsten bronze with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as preparation method and application of tungsten bronze
  • Tungsten bronze with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as preparation method and application of tungsten bronze
  • Tungsten bronze with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as preparation method and application of tungsten bronze

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Dissolve 0.2 g of ammonium tungstate in 20 ml of deionized water, add 1 g of oxalic acid and stir evenly, then adjust the pH value of the solution to 1.5 with concentrated hydrochloric acid, age the above solution for 2 hours at room temperature, and then add 0.05 g Ammonium Fluoride (NH 4 F), followed by the addition of 0.05 g sodium borohydride (NaBH 4 ), pour it into a 50 ml hydrothermal kettle, conduct hydrothermal treatment at 150 ℃ for 3 hours, and centrifugally dry to obtain tungsten bronze powder, whose general formula is (NH 4 ) 0.33 WO 2.75 f 0.2 , yield 78%. Such as figure 2 As shown in the scanning electron microscope photo, the tungsten bronze powder is a particle with a diameter of 30-50 nm.

Embodiment 2

[0043] Dissolve 1.2 g of sodium phosphotungstate in 30 ml of deionized water, add 0.5 g of citric acid and stir evenly, then adjust the pH value of the solution to 0.5 with concentrated hydrochloric acid, and age the above solution for 72 hours at room temperature. Then add 0.8 g stannous chloride (SnCl 2 ), pour it into a 50 ml hydrothermal kettle, treat it hydrothermally at 60 ℃ for 48 hours, and centrifugally dry it to obtain tungsten bronze powder, whose general formula is Na 0.33 W 0.88 sn 0.12 o 2.92 , the yield is 90%. Such as image 3 As shown in the scanning electron microscope photo, the tungsten bronze powder is granular with a diameter of 10-30 nm.

Embodiment 3

[0045] Dissolve 4.8 g of potassium tungstate in 40 ml of deionized water, add 2 ml of glacial acetic acid and stir evenly, then adjust the pH of the solution to 0.2 with concentrated hydrochloric acid, and add 0.5 g of hydrazine hydrochloride (N 2 h 4 ?HCl), 1g ammonium fluoride (NH 4 F) and 1.2g nickel chloride (NiCl 2 ), pour it into a hydrothermal kettle, hydrothermally treat at 100 ℃ for 12 hours, and centrifugally dry to obtain tungsten bronze powder, whose general formula is (NH 4 ) 0.33 W 0.9 Ni 0.1 o 2.75 f 0.2 , the yield is 95%. The tungsten bronze powder is in the shape of a short rod with a diameter of 5-10 nm and a length of 15-100 nm.

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Abstract

The invention belongs to the tungsten bronze preparation and application thereof in the chemical engineering filed and the material field, and specifically relates to tungsten bronze powder with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as a preparation method and application of the tungsten bronze. A technical problem to be solved is as follows: a technical scheme for further improving concentration and transparent insulation performances of free electrons in the tungsten bronze, effectively adjusting and controlling forbidden bandwidth of a tungsten bronze material and effectively lowering hydrothermal preparation difficulty of the material is provided. The specific scheme is as follows: the chemical general formula of the tungsten bronze is M1xW(1-y)M2yO(3-z-t)nMt, wherein M2 in the formula is a positive ion with chemical valence +3, +4 or +5, and exists in a tungsten bronze lattice in a form of a substitutional atom to occupy the lattice point position of W; nM in the formula is a negative ion, with the chemical valence of (-)1, of a nonmetal element, and exists in the tungsten bronze lattice in the form of the substitutional atom to occupy the lattice point position of O. The tungsten bronze powder or tungsten bronze dispersion liquid disclosed by the invention is low in preparation cost, excellent in performance and extensive in use.

Description

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Claims

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Application Information

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Owner HEBEI TIANBO CONSTR TECH
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