Abstract: A hydrogen storage electrode for use as an anode of an alkaline battery and a process for producing such electrode are disclosed. According to the process, firstly particles of hydrogen storage alloy powder with maximum particle size of 50 .mu.m is prepared. The alloy powder particles are then made into microcapsules by electroless plating with copper amounting to 10%-20% by weight with respect to the sum of the alloy powder and the plating copper. With an electric current collector placed in contact with the copper-plated alloy powder set in a die cavity of a molding press, the molding dies are closed to press and the copper-plated powder and the current collector for bonding them together thereby to form the hydrogen storage electrode. Pressure exerted during the pressing is applied to such an extent that the porosity of the resulting compact of the pressed alloy powder falls in the range of 10% to 25%.
Type:
Grant
Filed:
July 15, 1993
Date of Patent:
February 7, 1995
Assignees:
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Government Industrial Research Institute
Abstract: A ceramic material comprising a double phase complex sialon sintered body of .beta.'-type sialon and O'-type sialon being composed of the four elements of Si,Al,O and N and having a ratio of .beta.'-type sailon/O'-type sialon of 7/1 to 3/5 by weight ratio.The .beta.'-phase-O'-phase complex sailon has a dense structure and is excellent in high strength and high oxidation-resistance.
Type:
Grant
Filed:
May 26, 1989
Date of Patent:
June 19, 1990
Assignees:
NKK Corporation, Government Industrial Research Institute
Inventors:
Seiki Umebayashi, Kazushi Kishi, Kazuya Yabuta, Hiroaki Nishio