| 摘要 |
PURPOSE:To prevent the generation of defects in the inside of a sintered body, and increase the capability of surge energy absorption by a method wherein material powder containing zinc oxide as main component and metal powder of an amount larger than or equal to a specified value is mixed, ground and granulated to obtain granular powder, and the powder is subjected to compression, molding, and baking after the water content of the powder is adjusted at a specified value. CONSTITUTION:Material powder containing zinc oxide as main component and containg at least metal powder, metal carbide, or metal nitride of 0.3mol% or more is mixed, grinded, and granulated to obtain granular powder. The powder is subjected to compres sion, molding and baking after the water content is adjusted at 0.8-2.0wt.%. For exam ple, as to the above metal powder and the like, the following metal powder, carbide, or nitride are used; Si, Co, Zn, Mg, Al, Ti, Cr, Mn, Ni, Ce, Sn, Sb, Ge, Pr, etc. The molded body is calcinated at 800-1000 deg.C in the air: in order to form a high resistance layer 2, paste type side surface agent is spread on the side surface of the calcinated body, and baked at 1100-1200 deg.C in the air. After a glass stoved layer 3 is formed on the side surface of the sintered body 1 in the above manner, aluminum spraying electrodes are formed by polishing both of the end surfaces. |
