Tin oxide particles

A tin oxide, particle technology, applied in tin oxide, chemical instruments and methods, from chemically reactive gases, etc., can solve problems such as particle size uniformity limitations

Inactive Publication Date: 2001-04-25
NANOGRAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These solution-based syntheses can produce fine powders but are limited in the particle size uniformity achieved

Method used

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  • Tin oxide particles
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Examples

Experimental program
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Effect test

Embodiment 1

[0089] These examples illustrate the preparation of tin oxide nanoparticles with various lattices and stoichiometry. Also, the particles have particularly good particle size uniformity. The preparation of the particles described in Examples 1-3 essentially employed the laser pyrolysis setup described in Figure 2 above. The tin oxide nanoparticles described in Example 4 are further processed products, essentially applying the above Figure 5 The setup described in , the preparation of the starting particles was carried out in the laser pyrolysis setup in Figure 2. Example 1: SnO x Crystalline (1

[0090] This example describes the SnO x The synthesis of was carried out by laser pyrolysis. Bubbling of Ar gas through SnCl in a vessel at room temperature 4 liquid, the SnCl 4 (Strem Chemical, Inc. Newburyport, MA) precursor vapor was passed into the reaction chamber. C 2 h 4 Gas is used as the laser absorbing gas, and argon is used as the inert gas. Contai...

Embodiment 2

[0094] SnO nanoscale samples obviously contain some tin chloride residues, SnCl 2 . This is based on the appearance of shaded areas in photomicrographs and certain lines in x-ray diffraction. However, based on the crystallinity of the sample, and the distinction between the distinctive lines of tin chloride and those of other tin oxides in the diffractogram, tin chloride is a material that apparently does not interfere with the tin oxide lattice. The special lines corresponding to tin oxide in the diffraction pattern may be related to the tetragonal lattice. However, the type of wire may be related to any known tin oxide material or combination of known materials (mixed phase). Clearly, the prepared nanoparticles have a different stoichiometry and / or lattice structure than known tin oxide materials. Exclude SnCl from diffractogram 2 The contribution of the diffraction peaks due to the new tin oxide material can be identified. The peaks of these new tin oxide materials are...

Embodiment 3

[0097] Obtain the high scale TEM photomicrograph of this embodiment particle, as Figure 11 shown. Also, the particle size range of the particles is rather narrow. In this case, the largest and smallest particle diameters differ by no more than about 15 nm. An average particle size of approximately 45 nm was obtained. Example 3: SnO x Crystalline, sample 3

[0098] The experimental setup for the preparation of the nanoparticles described in this example was the same as described in Example 1. In the third column of Table 1 the reaction conditions are given. A significant difference in the laser pyrolysis conditions used to prepare the nanoparticles of Example 3 relative to the conditions used to prepare the nanoparticles of Examples 1 and 2 was the use of low chamber pressure.

[0099] The x-ray diffraction pattern for this material is Figure 10 shown. and Figure 6 and 10 Compared with the x-ray diffraction pattern of Figure 12 The x-ray diffraction pattern of ha...

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Abstract

Tin oxide nanoparticles were produced with tin in a variety of oxidation states. In particular, nanoparticles of single phase, crystalline SnO2 were produced. Preferred tin oxide nanoparticles have an average diameter from about 5 nm to about 100 nm with an extremely narrow distribution of particle diameters. The tin oxide nanoparticles can be produced in significant quantities using a laser pyrolysis apparatus. Nanoparticles produced by laser pyrolysis can be subjected to further processing to change the properties of the particles without destroying the nanoscale size of the particles. The nanoscale tin oxide particles are useful for the production of transparent electrodes for use in flat panel displays.

Description

field of invention [0001] The present invention relates to tin oxide particles with an average diameter of nanoscale. The present invention further relates to the preparation of nanoscale tin oxide particles by laser pyrolysis, and a transparent electrode comprising nanoscale tin oxide particles. Background of the invention [0002] Tin oxide can be present in various stoichiometries. Specifically, tin oxide is usually represented by SnO or SnO 2 exist. SnO 2 It is an n-type semiconductor with obvious conductivity at room temperature. Because of its semiconducting properties and its relatively high transparency to visible light, SnO 2 It has become an important component of transparent electrodes in flat panel displays, usually in combination with indium oxide to form indium tin oxide (ITO). SnO 2 It is also used in the preparation of gas sensors, catalysts, electrostatic charge protection coatings, and other devices. Solution-based methods are commonly used to prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00C01G19/02C30B25/00
CPCC01G19/02C30B25/00C01P2004/64B82Y30/00C30B29/16C30B29/605Y10T428/26B82B3/00C01B19/02
Inventor 苏伊特·库马尔毕向欣神部信幸
Owner NANOGRAM
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