Lanthanum hexaboride LaB6 phofo
Lintlha tse khutšoane:
Lanthanum hexaborateke inorganic non-metallic compound e entsoeng ka low valence boron le rare metal element lanthanum, e nang le sebopeho se khethehileng sa kristale le litšobotsi tsa motheo tsa borides. Ho ea ka pono ea thepa ea thepa, lanthanum hexaborate LaB6 ke ea motsoako oa tšepe oa refractory o nang le mohaho oa kristale oa cubic. E na le thepa e babatsehang joalo ka boima bo phahameng, conductivity e phahameng, sebaka se phahameng sa ho qhibiliha, coefficient e tlaase ea ho atolosa mocheso, le botsitso bo botle ba lik'hemik'hale. Ka nako e ts'oanang, lanthanum hexaborate e hlahisa sekhahla se phahameng sa hona joale le sekhahla se tlase sa mouoane ka mocheso o phahameng, 'me e na le khanyetso e matla khahlanong le bombardment ea ion, matla a matla a motlakase le mahlaseli. E 'nile ea sebelisoa ka thepa ea cathode, electron microscopy, electron beam welding Likopo tse sebetsang masimong a hlokang maqhubu a phahameng a emission, joalo ka li-tubes tse ntšang metsi.
Lanthanum hexaboratee na le lik'hemik'hale tse tsitsitseng 'me ha e sebetse ka metsi, oksijene, kapa esita le hydrochloric acid; Ka mocheso oa kamore, e arabela feela ka asiti ea nitric le aqua regia; Oxidation e etsahala feela ho 600-700 ℃ sebakeng sa aerobic. Sebakeng sa vacuum, lisebelisoa tsa LaB6 li na le tšekamelo ea ho sebetsana le lintho tse ling kapa likhase ho etsa lintho tse tlase tse qhibilihang; Lithempereicharang tse phahameng, lintho tse entsoeng li tla lula li fetoha mouoane, 'me li pepese sebaka se tlase sa ho phonyoha ha kristale ea lanthanum hexaborate sebakeng se tsoang, ka hona, lanthanum hexaborate e na le matla a matla a ho thibela chefo.
Thelanthanum hexaboratecathode e na le sekhahla se tlase sa mouoane le bophelo bo bolelele ba ts'ebeletso ka mocheso o phahameng. Ha e futhumetse mocheso o phahameng, liathomo tsa tšepe tsa lanthanum li hlahisa likheo ka lebaka la tahlehelo ea mouoane, ha liathomo tse ka hare tsa tšepe tsa lanthanum li ntse li hasana ho tlatsetsa likheo, ho boloka sebopeho sa boron se sa fetohe. Thepa ena e fokotsa tahlehelo ea mouoane ea LaB6 cathode mme e boloka sebaka se sebetsang sa cathode ka nako e le 'ngoe. Boemong bo tšoanang ba hona joale ba mosi, sekhahla sa mouoane oa thepa ea cathode ea LaB6 mochesong o phahameng se tlase ho feta sa lisebelisoa tse akaretsang tsa cathode, 'me sekhahla se tlase sa mouoane ke ntlha ea bohlokoa ho lelefatsa bophelo ba ts'ebeletso ea li-cathode.
| Lebitso la Sehlahiswa | Lanthanum hexaboride |
| Nomoro ea CAS | 12008-21-8 |
| Mokhoa oa limolek'hule | chefo ea lanthanum hexaboride |
| Boima ba molek'hule | 203.77 |
| Ponahalo | phofo e tšoeu / granules |
| Botenya | 2.61 g/mL ho 25C |
| Melting Point | 2530C |
| MF | LaB6 |
| Emission kamehla | 29A/cm2 · K2 |
| Emission jwale density | 29Acm-2 |
| Ho hanyetsa mocheso oa kamore | 15 - 27μΩ |
| Mocheso oa oxidation | 600 ℃ |
| Sebopeho sa kristale | khubu |
| lattice constant | 4.157A |
| mosebetsi oa mosebetsi | 2.66eV |
| Coefficient ea ho eketsa mocheso | 4.9×10-6K-1 |
| Vickers hardness (HV) | 27.7Gpa |
| Brand | Xinglu |
Kopo:
1. Lanthanum hexaborate LaB6 lisebelisoa tsa cathode
Sekhahla se phahameng sa hona joale sa mosi le sekhahla se tlase sa mouoane ka mocheso o phahameng oaLaB6 lanthanum hexaborateetsa hore e be thepa ea cathode e nang le ts'ebetso e phahameng, butle-butle e nkela sebaka sa li-tungsten cathodes lits'ebetsong tsa indasteri. Hajoale, libaka tsa mantlha tsa ts'ebeliso ea lisebelisoa tsa cathode tsa LaB6 tse nang le lanthanum hexaborate ke tse latelang:
1.1 Liindasteri tse ncha tsa thekenoloji tse kang lisebelisoa tsa elektroniki tsa microwave vacuum le li-ion thruster masimong a sesole le thekenoloji ea sebaka, lisebelisoa tsa pontšo le litšoantšo tse nang le tlhaloso e phahameng le tlhahiso e phahameng ea hona joale e hlokoang ke liindasteri tsa sechaba le tsa sesole, le laser beam lasers. Liindastering tsena tsa theknoloji e phahameng, tlhokahalo ea thepa ea cathode e nang le mocheso o tlase, tlhahiso e phahameng e ts'oanang, ts'ebetso e phahameng ea hona joale ea tlhahiso, le nako e telele ea bophelo esale e le thata haholo.
1.2 Indasteri ea li-welding tsa elektronike, ka tsoelo-pele ea moruo, e hloka mechine ea ho tjheseletsa bethe ea elektronike, ho qhibiliha ha beam ea elektronike, le lisebelisoa tsa ho itšeha tse nang le li-cathodes tse ka finyellang litlhoko tsa boima bo phahameng ba hona joale le mosebetsi o fokolang oa ho phonyoha. Leha ho le joalo, lisebelisoa tsa setso haholo-holo li sebelisa li-tungsten cathodes (tse nang le mosebetsi o phahameng oa ho phonyoha le ho fokotseha ha mocheso oa hona joale) tse sa khoneng ho finyella litlhoko tsa kopo. Ka hona, li-cathode tsa LaB6 li nkile sebaka sa li-tungsten cathodes ka ts'ebetso ea tsona e phahameng 'me li sebelisitsoe haholo indastering ea ho tjheseletsa beam ea elektronike.
1.3Ka indasteri ea lisebelisoa tsa tlhahlobo ea theknoloji e phahameng,LaB6cathode e sebelisa khanya ea eona e phahameng, nako e telele ea bophelo le litšobotsi tse ling ho nkela thepa ea setso e chesang ea cathode e kang tungsten cathode ka thepa ea elektronike e kang li-microscopes tsa elektronike, li-spectrometer tsa Auger le li-electron probes.
1.4Ka indasteri ea accelerator, LaB6 e na le botsitso bo phahameng khahlanong le ion bombardment ha e bapisoa le tungsten ea setso le tantalum. Ka hoo,LaB6li-cathodes li sebelisoa haholo ho li-accelerator tse nang le mehaho e fapaneng e kang synchrotron le cyclotron accelerators.
1.5TheLaB6cathode e ka sebelisoa ka har'a li-tubes tse ntšang khase, li-tubes tsa laser, le li-amplifiers tsa mofuta oa magnetron indastering ea 1.5 discharge tube.
2. LaB6, e le karolo ea elektroniki ea theknoloji ea morao-rao, e sebelisoa haholo indastering ea sechaba le ea ts'ireletso:
2.1 Cathode ea tlhahiso ea elektrone. Ka lebaka la mosebetsi o fokolang oa ho phonyoha ha elektronike, lisebelisoa tsa cathode tse nang le mocheso o phahameng ka ho fetisisa lithempereichara tse mahareng li ka fumanoa, haholo-holo likristale tse le 'ngoe tsa boleng bo holimo, e leng lisebelisoa tse loketseng bakeng sa li-cathode tsa elektronike tse matla haholo.
2.2 Mohloli oa leseli o phahameng o khanyang. Likarolo tsa mantlha tse sebelisetsoang ho lokisa li-microscopes tsa elektrone, joalo ka li-filters tsa mahlo, li-monochromator tse bonolo tsa X-ray, le mehloli e meng ea khanya ea elektrone.
2.3 Botsitso bo phahameng le likarolo tsa tsamaiso ea nako e telele ea bophelo. Ts'ebetso ea eona e phethahetseng e felletseng e thusa ts'ebeliso ea eona lits'ebetsong tse fapaneng tsa marako a elektrone, joalo ka mongolo oa beam ea elektrone, mehloli ea mocheso oa elektrone beam, lithunya tse chesehang tsa elektrone, le li-accelerator, bakeng sa tlhahiso ea likarolo tse sebetsang hantle haholo masimong a boenjiniere.
Tlhaloso:
| ITEM | LIEKETSENG TS'OANELO | LIPOLELO TSA TEKO |
| La(%,min) | 68.0 | 68.45 |
| B(%,mots) | 31.0 | 31.15 |
| lanthanum hexaboridechefo/(TREM+B)(%,min) | 99.99 | 99.99 |
| TREM+B(%,min) | 99.0 | 99.7 |
| RE Impurities(ppm/TREO,Max) | ||
| Ce | 3.5 | |
| Pr | 1.0 | |
| Nd | 1.0 | |
| Sm | 1.0 | |
| Eu | 1.3 | |
| Gd | 2.0 | |
| Tb | 0.2 | |
| Dy | 0.5 | |
| Ho | 0.5 | |
| Er | 1.5 | |
| Tm | 1.0 | |
| Yb | 1.0 | |
| Lu | 1.0 | |
| Y | 1.0 | |
| Non-Re Impurities(ppm,Max) | ||
| Fe | 300.0 | |
| Ca | 78.0 | |
| Si | 64.0 | |
| Mg | 6.0 | |
| Cu | 2.0 | |
| Cr | 5.0 | |
| Mn | 5.0 | |
| C | 230.0 | |
| Boholo ba karolo (μ M) | 50 nanometers- 360 mesh- 500 mesh; Customized ho ea ka litlhoko tsa bareki | |
| Brand | Xinglu | |
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