EP 0286164 B1 19920722 - PROCESS FOR PREPARING POWDERS OF NON-FERROUS METALS OR METAL ALLOYS
Title (en)
PROCESS FOR PREPARING POWDERS OF NON-FERROUS METALS OR METAL ALLOYS
Publication
Application
Priority
DE 3711650 A 19870407
Abstract (en)
[origin: JPS6425910A] PURPOSE: To manufacture the nonferrous metal powder which is uniform in grain size and fine in excellent yield by treating the nonferrous metal oxide, etc., of the prescribed concentration in the aqueous medium of the prescribed pH and temperature. CONSTITUTION: The oxide or hydroxide of the nonferrous metal of 20-400 g/l (calculated in terms of the metal) in concentration is suspended in the aqueous medium containing the aqueous sugar solution or the starch solution, and treated in the aqueous medium of >3.2 in pH and 20-160 deg.C in temperature range to separate the precipitated nonferrous metallic powder where little oxide is present. Cu, Ag, Ni, Co, Sn, Pb, Sb, As or Bi is preferably used for the nonferrous metal. The grain size of the powder is preferably regulated to be approximately 0.1-30 μm by changing the pH value at which the grain size is reduced as the pH value is increased in a range of 2<pH<=14.
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
B22F 9/20 (2013.01 - EP US); B22F 9/24 (2013.01 - EP US); C22C 1/04 (2013.01 - KR)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0286164 A1 19881012; EP 0286164 B1 19920722; AT E78429 T1 19920815; CA 1334626 C 19950307; CN 1016047 B 19920401; CN 88101908 A 19881026; DE 3711650 A1 19881027; DE 3872912 D1 19920827; DK 185288 A 19881008; DK 185288 D0 19880406; ES 2033413 T3 19930316; FI 881588 A0 19880406; FI 881588 A 19881008; FI 89811 B 19930813; FI 89811 C 19931125; GR 3006067 T3 19930621; IE 61459 B1 19941102; IE 881037 L 19881007; JP S6425910 A 19890127; KR 880012782 A 19881129; PT 87170 A 19880501; PT 87170 B 19920731; US 4818280 A 19890404
DOCDB simple family (application)
EP 88200571 A 19880326; AT 88200571 T 19880326; CA 563434 A 19880406; CN 88101908 A 19880406; DE 3711650 A 19870407; DE 3872912 T 19880326; DK 185288 A 19880406; ES 88200571 T 19880326; FI 881588 A 19880406; GR 920401647 T 19921023; IE 103788 A 19880407; JP 8625188 A 19880407; KR 880003850 A 19880406; PT 8717088 A 19880406; US 17871788 A 19880407