With the adoption of distinctive technique, this opaque quartz glass tube has its typical     characteristics of good visual aspects and stable physical & chemical properties, It serves  as material heating lamps for heaters, micro-wave oven, electrical baking oven,sterilization container and other other consumer and industrial infrared application. Further processing of trim cutting and round closed can be done according to the demand of the customers. 


                

                 Physical Properties
                 Opalescence Spectral Transmission at 500nm＜10%
                 SiO2＞99.5%
                 Heat Resistance Keep Under 900℃ for 15 minutes, then put into 20℃ water,3 times, no crack.