GLASS PRODUCTION DEVICE AND COMPONENT THEREOF, AND METHOD FOR CONDUCTION-HEATING SUCH COMPONENT

摘要

A hollow tubular body for molten glasses in which local overheat is reduced at the time of conduction heating. The hollow tubular body has a platinum or platinum alloy hollow tube which is used for conduction heating and is characterized in that a platinum or platinum alloy ring electrode is bonded to the outer circumference of the hollow tube, one or more lead-out electrodes are bonded to the outer edge of the ring electrode, and a thick portion is provided in at least a part of the joint with the ring electrode located closest to the lead-out electrode and in the vicinity thereof.