Patent ID: 7075404
Filing Date: 2006-07-11
Classification: C04B,H01C

Abstract:
1. A ceramic composition utilizable to form a varistor, comprising: zinc oxide as a primary component; and sub-components comprising praseodymium at a content of 0.05 to 3.0 atomic percent of the total, cobalt at a content of 0.5 to 10 atom percent of the total, at least one of potassium, sodium and lithium at a total content of 0.005 to 0.5 atom percent of the total, at least one of aluminum, gallium and indium at a total content of 2×10 −5 to 0.5 atom percent of the total, and zirconium at a content of 0.1 to 5.0 atom percent of the total.