錸,化學元素也,符號為Re,原子序七十五,因萊茵河為名。色銀白,屬過渡金屬。地殼之中,十億僅一,幾稀。熔點、沸點俱高。冶鉬、銅,並得錸。性近錳、鎝。一九二五年,初見於世,元素穩而不衰者,其惟晚得。
化學工業中,可作觸媒。而鎳、錸相雜,可成高溫合金,用諸噴氣發動機燃燒室、渦輪葉片、排氣噴嘴。蓋錸提取之難,猶甚鑽石,故價昂。錸亦用諸高效噴射引擎、火箭引擎,故屬軍資。
庶幾酸鹼不侵,獨化於濃硝酸而已。
聲音動静,具錄於維基共享︰錸 |
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