发明名称 |
FLAKY COPPER POWDER, PROCESS FOR PRODUCING THE SAME, AND CONDUCTIVE PASTE |
摘要 |
<p>It is an object of the present invention to provide a flaky copper powder composed of fine particles having a sharp distribution particle size, a large crystallite diameter and high oxidation resistance. The flaky copper powder of the present invention contains P and has a crystallite diameter/D 1A ratio of 0.01 or more to achieve the object. The method for producing the flaky copper powder comprises four steps: a first step of preparing an aqueous solution containing a copper salt and complexing agent; a second step of adding an alkali hydroxide to the aqueous solution to prepare a first slurry containing cupric oxide; a third step of adding a first reducing agent which can reduce the cupric oxide into cuprous oxide to the first slurry to prepare a second slurry containing cuprous oxide; and a fourth step of adding a second reducing agent which can reduce the cuprous oxide into copper to the second slurry to provide a flaky copper powder, wherein phosphoric acid and its salt are added in at least one of the first to third steps and/or in the second slurry in the fourth step.</p> |
申请公布号 |
EP1747830(A1) |
申请公布日期 |
2007.01.31 |
申请号 |
EP20050737035 |
申请日期 |
2005.04.26 |
申请人 |
MITSUI MINING AND SMELTING CO., LTD |
发明人 |
SAKAUE, TAKAHIKO;YOSHIMARU, KATSUHIKO;NAKAMURA, YOSHINOBU;SHIMAMURA, HIROYUKI |
分类号 |
B22F1/00;B22F9/24;B22F1/02;H01B1/02;H01B1/22;H01B13/00;H05K1/09 |
主分类号 |
B22F1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|