Electroconductive Particles

A conductive particle, conductive technology, applied in the direction of oxide conductors, non-metallic conductors, conductive materials dispersed in non-conductive inorganic materials, etc., to achieve the effect of high environmental resistance

Inactive Publication Date: 2015-07-01
MITSUI MINING & SMELTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technologies described in these documents are all aimed at improving the environmental resistance of conductive particles, and do not contain these other elements in the tin oxide coating layer.

Method used

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  • Electroconductive Particles
  • Electroconductive Particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A slurry was obtained by dispersing 200 g of titanium oxide particles (average particle diameter of primary particles: 200 nm) as a core material in 3 L of water. In this slurry, adding tin content is 41% sodium stannate (Na 2 SnO 3 ) 208g and make it dissolve, obtain mixed slurry. While circulating the mixed slurry, ultrasonic waves were irradiated by an ultrasonic oscillator installed in a part of the circulation path. The frequency of the ultrasound is set to 40kHz, and the output power is set to 570W. While irradiating ultrasonic waves to the circulating mixed slurry, a 20% dilute sulfuric acid aqueous solution was added to the mixed slurry to neutralize tin. Dilute aqueous sulfuric acid was added over 60 minutes until the pH of the mixed slurry reached 2.5. After neutralization, 0.97 g of zinc(II) chloride (grade 98%) was added to the mixed slurry, and the mixed slurry was stirred. Thereby, the precursor of the target electroconductive particle is obtained. A...

Embodiment 2

[0070] The amount of zinc chloride used in Example 1 was set as shown in Table 1. Except for this, electroconductive particle was obtained similarly to Example 1.

Embodiment 3

[0072] In Example 2, irradiation of ultrasonic waves was not performed. Except for this, electroconductive particle was obtained similarly to Example 1.

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Abstract

An electroconductive particle is composed of a core particle and tin oxide containing at least one element whose valence is equal to or smaller than four and located on the surface of the core particle. The tin oxide containing at least one element whose valence is equal to or smaller than four has a crystallite size of 5 to 20 nm. The element whose valence is equal to or smaller than four is preferably an element of the group 1 of the Periodic Table, an element of the group 2 of the Periodic Table, an element of the group 4 of the Periodic Table, an element of the group 12 of the Periodic Table, or an element of the group 13 of the Periodic Table. The content of the element whose valence is equal to or smaller than four is preferably 0.045 mol % to 20 mol % relative to tin.

Description

technical field [0001] This invention relates to the electroconductive particle which has the electroconductive surface layer containing tin oxide. Background technique [0002] Conventionally, as a method of imparting conductivity to non-conductive materials such as plastics, a method of adding a material that imparts conductivity is known. As such a material for imparting conductivity, known are, for example, surfactants, metal powders, carbon black, tin oxide powder doped with antimony, etc., powders with a tin oxide coating layer doped with antimony, and The surface of the core material made of titanium dioxide or barium sulfate is provided with conductive powder such as tin oxide coating powder. Among the above-mentioned various materials, if a surfactant is added to, for example, plastic, the conductivity of the obtained plastic may vary due to differences in temperature and humidity. If conductive powder such as metal powder or carbon black is added to plastic, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02
CPCH01B1/08H01B1/20
Inventor 井关博行马渡芳夫
Owner MITSUI MINING & SMELTING CO LTD
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