| 摘要 |
PROBLEM TO BE SOLVED: To provide a lanthanum chromite-based heating element capable of carrying out rapid heating up to high temperature and rapid cooling from high temperature and having a long service life; and to provide a manufacturing method of the heating element causing a small amount of evaporation of Cr as compared with a conventional lanthanum chromite-based heating element without needing to form an intermediate layer with compositions of the heating part and the terminal part mixed. SOLUTION: This heating element is characterized by that it has the heating element and the terminal part; it has a perovskite type crystalline structure expressed by a chemical formula La<SB>1-x</SB>Sr<SB>x</SB>Cr<SB>1-y</SB>Al<SB>y</SB>O<SB>3</SB>, where inequalities of 0.005≤x≤0.12 and 0.02≤y≤0.50 are satisfied; the rate of content of SiO<SB>2</SB>included in a sintered body is 300-1,000 ppm; the conductivity of the sintered body in the atmosphere at 1,000°C is 1-30 S/cm; a ratio (E<SB>2</SB>/E<SB>1</SB>) of electric conductivity E<SB>2</SB>of the terminal part to electric conductivity E<SB>1</SB>of the heating part is 2-20; sintered body bulk density is above 6.0 g/cm<SP>3</SP>; and the intermediate layer between the heating part and the terminal part has an inclined composition. COPYRIGHT: (C)2006,JPO&NCIPI
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