| 摘要 |
PURPOSE:To improve the resistance to thermal shock of a far infrared-ray radiator and to reduce production cost by blending clay and slag with lithium- series or cordierite-series ceramic, then molding and calcining the compound. CONSTITUTION:Clay and slag such as blast furnace slag or converter slag are blended with powder consisting of lithium-series or cordierite-series ceramic utilized as a main component and thereafter this compound is molded and calcined by setting sintering temp. Lithium-series or cordierite-series ceramic is low in thermal exansion coefficient and the value is extremely low at about 3X10<-6>/ deg.C even when clay and slag are added. Moldability is improved because clay component is added. Thereby the obtained far infrared-ray radiator is small in thermal expansion coefficient and therefore its resistance to thermal shock is improved. Since the price of a raw material is inexpensive, production cost is reduced. |
