On the Multilayered Chip-Type PTC Elements Prepared by Roll-Forming Process
We describe the fabrication of chip-type PTC elements (BaTiO3-based) by roll-forming process. Crack-free green tapes with good malleability are successfully obtained with the thickness typically in the range of 0.20~1.0mm. We also focus on reducing the room-temperature resistance of the chip-type PTC element without deteriorating its PTC effect, both by controlling the firing schedule and by introducing multilayer structure with electrode-bonding method. The typical size of the 5-layered chip-type PTC sample obtained is 8.0mm×5.0mm×1.95mm with R25=1.97- and Rmax/Rmin=4.8×105.
Wei Pan and Jianghong Gong
H. Liu, S. P. Gong, D. X. Zhou, "On the Multilayered Chip-Type PTC Elements Prepared by Roll-Forming Process", Key Engineering Materials, Vols. 336-338, pp. 661-664, 2007