Conductive particle, visible light transmissive particle dispersed conductor, method for producing same, transparent conductive thin film, method for producing same, transparent conductive article using same, infrared shield article
A technology of conductive particles and transparent conductive film, which can be used in cable/conductor manufacturing, chemical instruments and methods, conductive layers on insulating carriers, etc., and can solve problems such as inspection of transparent conductivity
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Embodiment 1
[0346] Tungsten hexachloride was dissolved in ethanol and dried at 130°C to produce tungsten oxide hydrate. It was heated at 550°C for 1 hour in a reducing gas atmosphere (argon / hydrogen=95 / 5 volume ratio), returned to room temperature once, and then heated at 800°C for 1 hour in an argon atmosphere to produce the target tungsten oxide powder.
[0347] As a result of identifying the crystalline phase by X-ray diffraction, the obtained powder was W 18 o 49 (WO 2.72 ) of the so-called Magnelli phase. The result of observing the shape of the powder by SEM is shown in Fig. 4(A) and (B). Among them, (A) is W 18 o 49The 10,000-fold SEM image of (B) is the 3,000-fold SEM image.
[0348] Then, as shown in Fig. 4(A) and (B), needle-shaped crystals were observed. In addition, the powder had a powder resistance value of 0.085 Ω·cm measured under a pressure of 9.8 MPa, confirming good electrical conductivity.
[0349] Mix 20 parts by weight of the WO 2.72 Powder of conductive par...
Embodiment 2
[0352] The ammonium metatungstate aqueous solution was dried at 130° C. to obtain a powdery tungsten oxide compound. This was heated at 550° C. for 1 hour in a reducing atmosphere (argon / hydrogen=97 / 3 volume ratio), returned to room temperature once, and then heated at 800° C. for 1 hour in an argon atmosphere to produce tungsten oxide powder. As a result of identifying the crystalline phase by X-ray diffraction, it was observed that W 18 o 49 (WO 2.72 ) crystal phase. Thus, even if ammonium metatungstate aqueous solution is used for a tungsten compound starting material, the electroconductive particle equivalent to Example 1 can be produced. The powder resistance value measured under the pressure of 9.8 MPa of this electroconductive particle powder was 0.089 Ω·cm, and it was confirmed that favorable electroconductivity was obtained.
Embodiment 3
[0354] Cesium carbonate and tungstic acid were mixed in a mortar so that the molar ratio of Cs / W was 0.33. This was heated at 600° C. for 2 hours in a reducing gas atmosphere (argon / hydrogen=97 / 3 volume ratio). Then, after returning to room temperature once, heating in an argon atmosphere at 800°C for 1 hour, thereby producing Cs 0.33 WO 3 powder of conductive particles. The results of identification of the crystalline phase by X-ray diffraction, Cs 0.33 WO 3 It is an alkali metal salt of hexagonal tungstate. The result of observing the shape of the powder of the conductive particles obtained by SEM is shown in Figure 5 . in, Figure 5 for Cs 0.33 WO 3 10,000x SEM images of the.
[0355] So, if Figure 5 As shown, hexagonal prism crystals were observed. The powder of the conductive particles had a powder resistance value measured at a pressure of 9.8 MPa of 0.013 Ω·cm, confirming good conductivity.
[0356] Mix 20 parts by weight of the Cs 0.33 WO 3 Powder of c...
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