Ceramic separators to place between green compacts during varistor sintering

ZnO metal oxide varistors are created using typical ceramic technology. During the process of sintering the green compacts may glue together and stick to each other so hard that they cannot be separated without damaging the varistor. This can be avoided in several ways but none is satisfactory and good enough as ones are not effective, while the other ones are simply inconvenient. The developed ceramic separators can be applied in multiple uses. In essence they are made of the same ceramic as varistor but doped with sinter-resisting component which causes the separators and sintered varistors do not stick together. They are reliable, economical and do not impose chemical contaminants to varistors.