Levitation melting is used instead of graphite crucible heating.
用悬浮熔融代替石墨坩埚加热方法。
Reduction experiments have been conducted in a vertical tube furnace using graphite crucible.
在竖管炉中用石墨坩埚进行还原试验。
Large size CaF_2 crystal has been grown by the Bridgman-Stockbarger method using a graphite crucible.
采用真空坩埚下降法在石墨坩埚中生长了大尺寸CaF_2晶体。
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