Sintered Lanthanum Hexaboride

Lanthanum Hexaboride yog opaque, tshwm xim liab ploog thaum qhuav, thiab tsaus liab thaum ntub. Sintered Lanthanum Hexaboride muaj cov qauv siv hluav taws xob sau lo lus, muaj qhov ua haujlwm siab, siab conductivity, siab melting taw tes thiab zoo tshuaj lom neeg, qhov evaporation tsawg ntawm qhov kub, qhov siab tshaj tawm tam sim no ntom ntuag thiab lwm yam zoo heev. Nws tau siv rau hauv tshuab hluav taws xob tsom, hluav taws xob nqaj hlau txuas, qhov dej tawm ntawm txoj hlab, thiab lwm yam.

Ib qho ntawm cov yam ntxwv tseem ceeb ntawm LaB6 ua cov khoom siv cathode yog tias nws muaj cov yam ntxwv ntawm kev tso pa tawm tam sim no siab thiab qis evaporation ntawm kub. Nyob hauv tib lub emission tam sim no ntom ntom, cov pa hluav taws ntawm LaB6 cathode cov khoom ntawm qhov kub siab yog qis dua li ntawm cov khoom siv cathode dav. Piv nrog tungsten cathodes, nyob rau hauv tib lub emission tam sim no ntom ntom, evaporation tus nqi ntawm LaB6 cathodes muaj qis dua qhov ntawm tungsten cathodes, thiab tus nqi qis evaporation yog qhov tseem ceeb hauv kev ncua lub neej kev pab cuam ntawm cathode.

Lanthanum Hexaboride cov khoom kuj tseem muaj cov yam ntxwv ua haujlwm tsawg. Piv txwv, lub lanthanum hexaboride cathode siv nyob rau hauv thermal ion emission scanning electron lub tshuab tsom kab hluav taws xob siv lub zog txaus rau hluav taws xob kom kov yeej cov haujlwm ua haujlwm thiab tawm nyob rau hauv siab kub. Yog li ntawd, LaB6 qes zog Lub zog muaj peev xwm ua tau ntawm qhov ntsuas kub tsawg (1,300 degree C), thiab tib lub sijhawm, kev hloov pauv ntawm cov khoom tuaj yeem txo, thiab lub teeb ci siab dua. Txawm li cas los xij, cov khoom siv LaB6 nws tus kheej muaj cov kev ua haujlwm muaj zog thiab ua kom lub zog qes. Nws yuav tsum tau ua haujlwm hauv qhov chaw nqus tau zoo, thiab tom qab ntawd nce Kev loj hlob thiab daim ntawv thov tus nqi ntawm cov khoom LaB6 tau raug txo kom tsawg. Tsis tas li ntawd, LaB6 cathode kuj muaj qhov zoo ntawm kev ua haujlwm siab, qis thermal nthuav, tsis kam mus rau ion bombardment, tsis kam mus rau thaj chaw hluav taws xob muaj zog, thiab muaj zog tiv taus hluav taws xob.

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