Lanthanum hexaboride LaB6 powder

Ulwazi olufutshane:

Lanthanum hexaboratei-inorganic non-metallic compound eyenziwe yi-valence boron ephantsi kunye ne-rare metal element lanthanum, enesakhiwo esikhethekileyo sekristale kunye neempawu ezisisiseko ze-borides. Ukususela kumbono wezinto eziphathekayo, i-lanthanum hexaborate LaB6 iyingxenye ye-metal refractory compound ene-cubic crystal structure. Ineempawu ezibalaseleyo ezinjengokuqina okuphezulu, ukuhanjiswa okuphezulu, indawo ephezulu yokunyibilika, i-coefficient ephantsi yokwandiswa kwe-thermal, kunye nokuzinza okuhle kweekhemikhali. Kwangaxeshanye, i-lanthanum hexaborate ikhupha uxinaniso oluphezulu lwangoku kunye nesantya esisezantsi sokunyuka komphunga kumaqondo obushushu aphezulu, kwaye inokumelana ne-ion bombardment, indawo yombane enamandla, kunye nemitha. Isetyenziswe kwizinto ze-cathode, i-electron microscopy, i-electron beam welding Izicelo kwiinkalo ezifuna imisinga ephezulu yokukhutshwa, njengeetyhubhu zokukhupha.

 Lanthanum hexaborateineempawu zeekhemikhali ezizinzileyo kwaye ayisebenzi ngamanzi, ioksijini, okanye i-hydrochloric acid; Kwiqondo lokushisa lokushisa, liphendula kuphela nge-nitric acid kunye ne-aqua regia; Ukukhutshwa kweoksijini kwenzeka kuphela kuma-600-700 ℃ kwiatmosfera ye-aerobic. Kwi-vacuum atmosphere, imathiriyeli ye-LaB6 ithanda ukusabela nezinye izinto okanye iigesi ukuze zenze izinto ezisezantsi zokunyibilika; Kubushushu obuphezulu, izinto ezibunjiweyo ziya kuhlala zingumphunga, ziveze umphezulu wokubaleka osezantsi wekristale enehexaborate ye-lanthanum kwindawo ephumayo, ngaloo ndlela inika i-lanthanum hexaborate isakhono esibalaseleyo sokuchasa ubuthi.

Ilanthanum hexaborateI-cathode inezinga eliphantsi lokuphuma komphunga kunye nobomi benkonzo ende kumaqondo obushushu aphezulu. Xa ishushu kwiqondo lobushushu eliphezulu, umphezulu metal iathom lanthanum zivelisa izithuba ngenxa ilahleko engumphunga, lo gama iathom yentsimbi yangaphakathi lanthanum nazo zisasazeke ukongeza izithuba, ukugcina boron isakhelo isakhiwo ingatshintshanga. Le propati inciphisa ilahleko yokumka komphunga ye-LaB6 cathode kwaye igcine umphezulu osebenzayo wecathode ngaxeshanye. Ngexesha elifanayo lokuxinaniswa kwangoku, izinga lokunyuka kwe-LaB6 lezinto ze-cathode kumaqondo obushushu aphezulu liphantsi kunelo lezinto eziqhelekileyo ze-cathode, kwaye izinga lokunyuka komphunga liyinto ebalulekileyo ekwandiseni ubomi benkonzo yee-cathodes.

Isicelo:

1. Lanthanum hexaborate LaB6 cathode izinto

Ubuninzi bangoku obukhutshwayo obuphezulu kunye nesantya esisezantsi sokunyuka komphunga kumaqondo obushushu aphezuluLaB6 lanthanum hexaborateyenze ibe yimathiriyeli ye-cathode kunye nokusebenza okuphezulu, ngokuthe ngcembe ithathe indawo ye-tungsten cathodes kwizicelo zamashishini. Okwangoku, iindawo eziphambili zesicelo se-LaB6 cathode materials kunye ne-lanthanum hexaborate zilandelayo:

1.1 Amashishini ethekhinoloji amatsha afana ne-microwave vacuum electronic devices kunye ne-ion thruster kumacandelo obugcisa bomkhosi nasemajukujukwini, izixhobo zokubonisa nezomfanekiso ezinenkcazo ephezulu kunye nokukhutshwa kwezinto ezikhutshwayo ngoku okuphezulu okufunwayo ngamashishini oluntu nawomkhosi, kunye ne-electron beam lasers. Kula mashishini akumgangatho ophezulu, imfuno yemathiriyeli ye-cathode enobushushu obuphantsi, ukukhutshwa kwezinto ezifanayo, ukuxinana okuphezulu kwangoku, kunye nobomi obude buhlala buqinile.

1.2 Ushishino lwe-electron beam welding, kunye nophuhliso loqoqosho, ludinga oomatshini be-electron beam welding, ukunyibilika kwe-electron beam, kunye nezixhobo zokusika ezine-cathodes ezinokuhlangabezana neemfuno zoxinzelelo oluphezulu lwangoku kunye nomsebenzi ophantsi wokuphunyuka. Nangona kunjalo, izixhobo zemveli zisebenzisa i-tungsten cathodes (enomsebenzi ophezulu wokubaleka kunye noxinzelelo oluphantsi lokukhutshwa kwangoku) ezingenako ukuhlangabezana neemfuno zesicelo. Ngoko ke, i-LaB6 cathodes ithathe indawo ye-tungsten cathodes kunye nokusebenza kwayo okuphezulu kwaye isetyenziswe ngokubanzi kwishishini le-electron beam welding.

1.3 Kushishino lwesixhobo sovavanyo lobuchwepheshe obuphezulu,ILaB6I-cathode isebenzisa ukukhanya kwayo okuphezulu, ubomi obude kunye nezinye iimpawu zokutshintsha izinto ze-cathode ezishushu ezifana ne-tungsten cathode kwizixhobo zombane ezifana ne-electron microscopes, i-Auger spectrometers, kunye ne-electron probes.

I-1.4Kushishino lwe-accelerator, i-LaB6 inozinzo oluphezulu ngokuchasene ne-ion bombardment xa kuthelekiswa ne-tungsten yendabuko kunye ne-tantalum. Nje ngeziphumo,ILaB6i-cathodes isetyenziswa ngokubanzi kwii-accelerators ezinezakhiwo ezahlukeneyo ezifana ne-synchrotron kunye ne-cyclotron accelerators.

1.5 IILaB6I-cathode ingasetyenziswa kwiityhubhu zokukhupha igesi, iityhubhu ze-laser, kunye ne-magnetron type amplifiers kwishishini le-tube yokukhupha i-1.5.

2. I-LaB6, njengecandelo lombane kubuchwepheshe bale mihla, isetyenziswa kakhulu kumashishini oluntu nawokhuselo:

2.1 I-electron emission cathode. Ngenxa yomsebenzi wokuphuncuka kwe-electron ephantsi, izixhobo ze-cathode ezineyona ndawo iphezulu yokukhupha ngoku kumaqondo obushushu aphakathi zinokufumaneka, ngakumbi iikristale ezikumgangatho ophezulu ezizezona zinto zifanelekileyo kwiicathodes zokukhutshwa kwe-electron ephezulu.

2.2 Umthombo wokukhanya okuphezulu. Amacandelo angundoqo asetyenziselwa ukulungiselela iimicroscopes ze-electron, ezifana nezihluzi zamehlo, ii-monochromators ze-X-ray ezithambileyo, kunye neminye imithombo yokukhanya ye-electron.

2.3 Uzinzo oluphezulu kunye namacandelo enkqubo yokuphila ixesha elide. Ukusebenza kwayo okugqwesileyo okugqwesileyo kwenza ukusetyenziswa kwayo kwiinkqubo ezahlukeneyo ze-electron beam, ezifana nokukrolwa kwe-electron beam, imithombo yobushushu be-electron beam, imipu ye-electron beam welding, kunye ne-accelerator, ukwenzela ukuveliswa kwamacandelo asebenza kakhulu kwiinkalo zobunjineli.

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