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IntroductionLanthanidehydridecanbepreparedbydirecthydro genationofthemetalprovidedthatitisfirstactivatedbyheatingto 30 0℃inhydrogen ,followedbycoolingunderhydrogen .1Usingthismethodtopreparelanthanumhy dride ,theproducthasanaveragediameteraround 5 0μm ,anditss… 相似文献
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