Research on the manufacture of laminated BaTiO3-based thermistor by roll forming

New laminated BaTiO3-based positive temperature coefficient thermistors prepared by roll forming have been studied. Through changing the factors that influence the roll forming process, thick film positive temperature coefficient (PTC) BaTiO3 green sheets with good plasticity, uniformity, compactness and smoothness were obtained. After the films sintered at high temperature in the air and electrodes screen printed, laminated PTC thermistors, which possess many good features, such as small size and lower room resistivity and larger current flux, can be obtained. It is the first time that such laminated PTC thermistors are reported. The lamination technology and electrical behavior of PTC thermistors were also investigated.