| 摘要 |
PURPOSE: Provided is a ceramic PTC composition having a low electrical resistivity at a room temperature and a decreased initial inrush current suitable to be used in a material for automobile heater. CONSTITUTION: The ceramic PTC composition having a low electrical resistivity is characterized by comprising 64-82 mol% of BaTiO3, 0.25-0.4 mol% of Y2O3, 10-15 mol% of CaTiO3, 0.01-0.05 mol% of MnO2, 1-1.5 mol% of SiO2, 5-10 mol% of SrTiO3 and 0.5-2.5 mol% of PbTiO3 to which 0.5-2.5 mol% of MoSi2 is added. Alternatively, the ceramic PTC composition comprises 3-5 mol% of MoSi2 instead of 0.5-2.5 mol% of PbTiO3 and 0.5-2.5 mol% of MoSi2.
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