Title:
微粒銀粉の製造方法
Document Type and Number:
Japanese Patent JP4489389
Kind Code:
B2
Abstract:
An object of the present invention is to provide a silver powder which is an unprecedentedly fine particulate silver powder, has a dispersibility more approximate to monodispersibility resulting less aggregation, and has a low impurity content. To achieve the above object, a fine particulate silver powder having unprecedented powder properties in which: a. the average particle diameter DIA of the primary particles obtained by image analysis of a scanning electron micrograph is 0.6 mum or less; b. the crystallite diameter is 10 nm or less; c. the sintering starting temperature is 240° C. or less; and d. the carbon content is 0.25 wt % or less is obtained by allowing a silver ammine complex aqueous solution S1 to flow in a certain flow path (hereinbelow referred to as "first flow path") providing a second flow path b which joins the first flow path a on its way and allowing an organic reducing agent and additives S2, if required, to flow into the first flow path a through the second first flow path b, and contacting and mixing them at the joining point of the first flow path a and the second flow path b to allow reduction and deposition of particles, and washing the particles with an excess amount of an alcohol.
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Inventors:
Takuya Sasaki
Kato Masashi
Katsuhiko Yoshimaru
Kato Masashi
Katsuhiko Yoshimaru
Application Number:
JP2003281660A
Publication Date:
June 23, 2010
Filing Date:
July 29, 2003
Export Citation:
Assignee:
Mitsui Mining & Smelting Co., Ltd.
International Classes:
B22F1/00; B22F9/24; C22C5/06
Domestic Patent References:
| JP2001107101A | ||||
| JP2003034802A | ||||
| JP2003129106A | ||||
| JP2000234107A | ||||
| JP7021832A |
Attorney, Agent or Firm:
Katsuhiro Yoshimura