This paper applied gelcasting, a novel forming method, to form BaTiO 3 -based ceramic thermistor. The resistivity-temperature characteristics and microstructures of gelcast samples from suspensions with different solids loading were investigated in comparison with those of die-pressed ones. It is found that gelcast ceramics exhibit stronger PTCR effect than die-pressed ones at the same sintering systems and that the solids loading in the range of 42-50vol.% has slight influence on the PTCR effect of gelcast ceramics. The two phenomena were explained.