... shields, molybdenum side shields, tungsten down shield, tungsten bottom shield, molybdenum current Lead Shield, molybdenum current Lead Shield ... crucible Pallet for sapphire crystal growth furnace- molybdenum bottom for sapphire crystal growth furnace- tungsten seed holder or ... furnace- Luoyang Achemetal Co., Ltd can produce tungsten bottom shield for sapphire crystal growth furnace according to the ...