... , Li: 0.8ppm, Al: 25ppm, K:1.2ppm, Na: 2ppm Ca:0.8 Mg:0.25 The milky quartz tubes has ... properties. It is used as material of infrared heating lamps for heaters, microwave oven, electrical baking oven, sterilization container and other ... (); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Continuous melting milky quartz heating tube for heaters