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Indium tin oxide powder and dispersion thereof

A technology of indium tin oxide and indium tin hydroxide, applied in the field of indium tin oxide powder, powder and dispersion itself, and agglomerates of indium tin oxide

Inactive Publication Date: 2011-04-13
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] This known co-precipitation method leads to products with defects related to transparency, conductivity and IR absorbing ability

Method used

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  • Indium tin oxide powder and dispersion thereof
  • Indium tin oxide powder and dispersion thereof
  • Indium tin oxide powder and dispersion thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A-1

[0109] Embodiment A-1: ​​the tin chloride (IV) 5H of the indium chloride (III) of 151.1kg, 12.6kg 2 O and 6.25 kg of caprolactam were added to 460.4 kg of water and stirred. Once a clear solution formed, it was heated to 50°C. Thereafter, 122.8 kg of ammonium hydroxide solution (25%) were added dropwise with stirring. The suspension was stirred for a further 24 hours. Thereafter, another 208.52 kg of ammonium hydroxide solution was added. Removal of ammonium chloride via cross-flow filtration: permeate flow rate 260-300kg / m 2 h. The conductivity of the suspension was 1018 μS / cm. Thereafter, the liquid phase was removed by spray drying. Finally, the suspension obtained after removal of the ammonium chloride with a solids content of 9.6% by weight was fed at 20 l / h with the aid of 8 m 3 (STP) / h of air spray into the dryer (operating temperature 300°C, cone temperature 110°C, output air temperature 115°C). Agglomerates of indium tin hydroxide having the physicochemical pa...

Embodiment A-2

[0110] Example A-2: Similar to Example 1, except using 147.8 kg of indium(III) chloride, 176.4 kg of tin(IV) chloride 5H 2 O and 6.25kg of caprolactam.

Embodiment A-3

[0111] Example A-3: Similar to Example 1, except that 151.1 kg of indium(III) chloride, 12.6 kg of tin(IV) chloride 5H were used 2 Other than O and 6.25kg of β-alanine. Agglomerates of indium tin hydroxide having the physicochemical parameters shown in Table 1 were obtained.

[0112] Table 1: Agglomerates of indium tin hydroxide

[0113] Example

A-1

A-2

A-3

In content

weight%

94.96

92.17

94.96

Sn content

weight%

4.99

6.94

4.98

C content

weight%

0.042

0.089

0.056

BET surface area 1)

m 2 / g

121

127

117

packing density 2)

g / l

684

n.d.

n.d.

drying loss 3)

weight%

4.4

n.d.

n.d.

Loss on ignition 4)

weight%

18.0

n.d.

n.d.

d 50 5)

μm

12.8

17.9

16.5

pH 6)

5.4

n.d.

n.d.

[0114] 1) According to DIN 66131; 2) Based...

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Abstract

Surface-modified agglomerate of indium tin oxohydrate with a proportion of indium of 80 to 98.9% by weight, of tin of 2 to 20% by weight and of carbon of 0.01 to 1% by weight. Process for preparing a surface-modified agglomerate of indium tin oxide, in which the surface-modified agglomerate of indium tin oxohydrate is dried under air at temperatures of more than 150 DEG C and less than 310 DEG C, and is then calcined under reducing conditions. Surface-modified agglomerate of indium tin oxide obtainable by this process. Process for preparing a surface-modified powder of indium tin oxide and a dispersion thereof, in which the surface-modified agglomerate and one or more solvents are combined to give a mixture, the mixture is converted to a dispersion by means of a dispersing unit and liquid constituents are optionally removed from the dispersion in order to obtain a powder. Process for producing a coating material or moulding material, in which the agglomerates of indium tin oxide or the dispersion of indium tin oxide powder and in each case one or more binders are used.

Description

technical field [0001] The present invention relates to surface-modified indium tin oxohydrate agglomerates and a process for their preparation. [0002] The invention also relates to a process for the preparation of surface-modified agglomerates of indium tin oxide, and to the surface-modified agglomerates of indium tin oxide (ITO) themselves. [0003] The invention further relates to a process for preparing a powder of surface-modified indium tin oxide (ITO) and a dispersion thereof, and to the powder and the dispersion itself. [0004] The invention also relates to a method for producing coating and forming materials using the surface-modified indium tin oxide agglomerates or the surface-modified indium tin oxide powder. Background technique [0005] The indium tin oxide layer is notable for its high transparency, high conductivity and high IR absorbing capability. Such a layer can be obtained, for example, via sputtering or via application of indium tin oxide powder in...

Claims

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Application Information

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IPC IPC(8): C01G15/00C01G19/00
CPCC01G19/00C01P2006/11C01P2004/40C01P2006/64C01P2006/63C01G15/00C01P2006/12C01P2002/54
Inventor S·希尔W·沃姆巴赫尔K·道特
Owner EVONIK DEGUSSA GMBH
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