Lanthanum hexaboride LaB6 hupfu

Ruzivo rupfupi:

Lanthanum hexaborateis an inorganic non-metallic compound inoumbwa ne low valence boron uye isingawanzo simbi element lanthanum, ine special crystal structure uye basic features of borides. Kubva pamaonero ezvivakwa zvezvinhu, lanthanum hexaborate LaB6 ndeyesimbi inogadzirisa komputa ine cubic crystal chimiro. Iyo ine yakanakisa zvimiro senge kuomarara kwakanyanya, yakakwirira conductivity, yakakwira kunyungudika, yakaderera coefficient yekuwedzera kwekupisa, uye yakanaka kugadzikana kwemakemikari. Panguva imwecheteyo, lanthanum hexaborate inoburitsa yakakwira ikozvino density uye yakaderera evaporation mwero pakupisa kwakanyanya, uye inopikisa zvakasimba ion bombardment, simba remagetsi, uye mwaranzi. Yakave ichishandiswa mune cathode zvinhu, erekitironi microscopy, erekitironi beam welding Zvishandiso muminda inoda yakakwira emission currents, senge machubhu ekuburitsa.

 Lanthanum hexaborateine makemikari akadzikama uye haaiti nemvura, okisijeni, kana kunyange hydrochloric acid; Pakupisa kwekamuri, inongosangana ne nitric acid uye aqua regia; Oxidation inongoitika pa600-700 ℃ mumhepo ine aerobic. Mumhepo yekutsvaira, LaB6 zvinhu zvinowanzoitika kune zvimwe zvinhu kana magasi kuumba yakaderera kunyungudika zvinhu; Pakupisa kwakanyanya, zvinhu zvakaumbwa zvinoramba zvichinyunguduka, zvichifumura nzvimbo yakaderera yekupukunyuka yekristaro yelanthanum hexaborate kune emission surface, zvichipa lanthanum hexaborate yakanakisa anti chepfu.

Thelanthanum hexaboratecathode ine yakaderera evaporation mwero uye hupenyu hwesevhisi hurefu pakupisa kwakanyanya. Kana ichipisa kusvika kune tembiricha yakakwira, maatomu esimbi yelanthanum anoburitsa nzvimbo nekuda kwekurasikirwa kwemvura, ukuwo maatomu esimbi emukati elanthanum anopararira kuwedzera nzvimbo, kuchengetedza boron framework chimiro chisina kuchinjika. Ichi chivakwa chinoderedza kurasikirwa kwekubuda kweLaB6 cathode uye inochengetedza inoshanda cathode pamusoro panguva imwe chete. Panguva imwecheteyo emission density yazvino, mwero wekubuda kweLaB6 cathode zvinhu pakupisa kwepamusoro wakadzikira pane wezvakajairwa cathode zvinhu, uye yakaderera evaporation mwero chinhu chakakosha mukuwedzera hupenyu hwesevhisi yekathodhi.

Application:

1. Lanthanum hexaborate LaB6 cathode zvinhu

The high emission current density uye yakaderera evaporation mwero pakupisa kwepamusoro kweLaB6 lanthanum hexaborateita iyo cathode zvinhu nekuita kwepamusoro, zvishoma nezvishoma kutsiva mamwe tungsten cathodes mumaindasitiri ekushandisa. Parizvino, nzvimbo huru dzekushandisa dzeLaB6 cathode zvinhu zvine lanthanum hexaborate ndeaya anotevera:

1.1 Maindasitiri etekinoroji matsva senge microwave vacuum midziyo yemagetsi uye ion thrusters mumauto uye muchadenga tekinoroji minda, kuratidza uye imaging zvishandiso zvine tsananguro yepamusoro uye yakakwira yekuburitsa ikozvino inodiwa nemaindasitiri ehurumende nemauto, uye maelectron beam lasers. Mune aya maindasitiri epamusoro-tekinoroji, kudiwa kwezvinhu zvecathode zvine tembiricha yakaderera, yakakwira yunifomu emissivity, yakakwira yazvino emission density, uye hupenyu hurefu hwagara hwakasimba.

1.2 Indasitiri ye electron beam welding, pamwe nekusimudzira hupfumi, inoda michina yekukwesha maelectron beam, kunyunguduka kweelectron beam, uye midziyo yekucheka ine macathodes inokwanisa kuzadzisa zvinodiwa zvehurefu hwazvino uye basa rekutiza rakaderera. Nekudaro, zvigadzirwa zvechinyakare zvinonyanya kushandisa tungsten cathodes (ine yakanyanya kupukunyuka basa uye yakaderera ikozvino emission density) isingakwanise kuzadzisa zvinodiwa zvekushandisa. Naizvozvo, maLaB6 cathodes akatsiva tungsten cathodes nekuita kwawo kwepamusoro uye akashandiswa zvakanyanya muindasitiri yesimbi yemagetsi.

1.3 Muiyo yepamusoro-tech yekuyedza chiridzwa indasitiri,LaB6cathode inoshandisa kupenya kwayo kwepamusoro, hupenyu hurefu uye humwe hunhu kutsiva zvechinyakare zvinopisa cathode zvinhu zvakaita setungsten cathode mumidziyo yemagetsi senge electron microscopes, Auger spectrometers, uye maelectron probes.

1.4Muindasitiri yekumhanyisa, LaB6 ine kugadzikana kwepamusoro kurwisa ion bombardment zvichienzaniswa neyechinyakare tungsten uye tantalum. Semagumo,LaB6macathodes anoshandiswa zvakanyanya mukukwirisa ane zvimiro zvakasiyana senge synchrotron uye cyclotron accelerators.

1.5TheLaB6cathode inogona kuiswa mumachubhu ekuburitsa gasi, laser machubhu, uye magnetron mhando amplifiers mune 1.5 discharge chubhu indasitiri.

2. LaB6, sechikamu chemagetsi mune tekinoroji yemazuva ano, inoshandiswa zvakanyanya mumaindasitiri ehurumende nekudzivirira:

2.1 Electron emission cathode. Nekuda kweiyo yakaderera maerekitironi ekutiza basa, zvinhu zvecathode zvine yakanyanya kuburitsa ikozvino pane tembiricha yepakati zvinogona kuwanikwa, kunyanya emhando yepamusoro makristasi, ari zvinhu zvakanakira emagetsi emagetsi emission cathodes.

2.2 Chitubu chechiedza chepamusoro chinopenya. Izvo zvakakosha zvinoshandiswa kugadzira maelectronic microscopes, senge optical mafirita, yakapfava X-ray diffraction monochromators, uye mamwe maelectron beam light sources.

2.3 Kugadzikana kwepamusoro uye hupenyu hwehupenyu hwepamusoro zvikamu. Kuita kwayo kwakanakisa kwakazara kunogonesa kushandiswa kwayo mumasisitimu akasiyana-siyana erekitironi, senge erekitironi beam engraving, erekitironi beam kupisa masosi, maelectron beam welding pfuti, uye accelerators, kugadzirwa kwezvinhu zvinonyanya kushanda muminda yeinjiniya.

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