Varistoras compositions based on mixed oxide of calcium, copper and titanium (CCTO) and calcium titanate (CaTiO3) and its method of production of varistor blocks

摘要

Varistoras compositions based on mixed oxide of calcium, copper and titanium (CCTO) and calcium titanate (CaTiO ~ 3 ~) and its method of production of varistor blocks.The present invention relates to compositions varistoras based on metal oxides, particularly based on mixed oxide of calcium, copper and titanium (CCTO), with the presence or not of calcium titanate (CaTiO ~ 3 ~) for forming ceramic varistor blocks (resistors. Will be linear).These compositions, particularly based on compounds of structure type perovsquita CaCu ~ 3 ~ Ti ~ 4 ~ ~ 12 ~ Ca ~ 2 ~ Cu ~ 2 ~ you ~ 4 ~ ~ 12 ~ and Ca ~ 3 ~ cuti ~ 4 ~ ~ 12 ~ or their mixtures with the compound CaTiO3, are a an alternative to traditional varistoras compositions, these on the basis of carbide SIL. u00edcio (SIC), zinc oxide (ZnO) and titanatos type MTiO ~ x ~ (where m is a metal.Usually estru00f3ncio or barium), presenting the best property or non ohmic or lower cost. Varistoras ceramics are used as elements of protective devices against overvoltages in both electrical and electronic equipment in residential and industrial and distribution lines and electric power transmission.The present invention also refers to the method of processing and production of such compositions.