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已经研究出一种一步焊接方法,使蓝宝石和铌能形成真空气密封接。这种封接件能够在液氦和1725℃的温度之间循环,而且在高温下具有优良的稳定性和低的蒸气压。
A one-step welding process has been developed that enables sapphire and niobium to form a hermetic hermetic seal. This seal can circulate between the liquid helium and the temperature of 1725 ° C and has excellent stability and low vapor pressure at high temperatures.