Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides

Dispersion and microwave processing of nano-sized ITO powder for the fabrication of transparent conductive oxides
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用于制造透明导电氧化物的纳米 ITO 粉末的分散和微波处理

DOI:
10.1016/j.ceramint.2016.08.157
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发表时间:
2016
影响因子:
5.2
通讯作者:
Ghanizadeh S
Ghanizadeh S
中科院分区:
材料科学1区
文献类型:
--
作者:
Ghanizadeh S

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制备了锡掺杂氧化铟(ITO)纳米粉体的水相分散体,并通过zeta电位和粒径分布测量考察了PEG 400、Tween 80和β-丙氨酸作为分散剂对其分散性的影响。peg400和β-丙氨酸均能产生稳定的分散体,可通过浸渍和自旋镀膜方法在玻璃衬底上沉积ITO薄膜。采用常规热处理和微波热处理两种方法对ITO薄膜进行热处理,以改善颗粒间的连接,从而提高薄膜的电阻率和透明度。所有薄膜经过热处理处理后,在可见光谱上的平均透射率为bbb80 %。在没有分散剂的情况下制备的ITO薄膜在两种加热方法下都显示出非常高的电阻率值,然而在分散体中加入2 wt%的PEG 400,常规处理和微波处理的薄膜的电阻率值分别降低到1.4×10−1Ω cm和3.8×10−2Ω cm。表面形貌研究证实,分散剂的加入大大改善了ITO膜的均匀性和颗粒间的连接。
Aqueous dispersions of tin-doped indium oxide (ITO) nanopowder were prepared and the effect of the addition of PEG 400, Tween 80 and β-alanine as dispersants was investigated using zeta potential and particle size distribution measurements. Both PEG 400 and β-alanine were found to produce stable dispersions that were used to deposit ITO thin films on glass substrates by dip and spin coating methods. The ITO thin films were heat-treated using both conventional and microwave heat treatment in order to improve the inter-particle connections and hence the resistivity and transparency of the films. All the films exhibited an average transmittance of >80% over the visible spectrum after being subjected to the heat treatment process. ITO films prepared with no dispersant showed very high resistivity values for both heating methods, however addition of 2 wt% PEG 400 to the dispersion yielded a reduction in the resistivity values to 1.4×10−1Ω cm and 3.8×10−2Ω cm for conventionally and microwave treated films, respectively. The surface morphological studies confirmed that addition of dispersants improved the film uniformity and inter-particle connections of the ITO films considerably.
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