Kamoo Phofo ea Boron Nitride e Fanang ka Setlolo se sa Feleng Tlas'a Mocheso
Lintlha tsa Bohlokoa
- Phofo ea Boron nitride e fana ka setlolo se tšepahalang mochesong o feteletseng, ho boloka tshebetso ho fihlela ho 3000 °C dibakeng tsa naetrojene.
- Eona coefficient e tlase ea khohlano e fokotsa ho tsofala le ho taboha ha mechini, e netefatsa hore ts'ebetso e boreleli le bophelo ba lisebelisoa bo bolelele.
- Ho se sebetse hantle ha lik'hemik'hale tsa Boron nitride ho e lumella ho hanela liketso tse bakoang ke lik'hemik'hale tse matla, e leng se etsang hore e be ntle bakeng sa lits'ebetso tsa mocheso o phahameng liindastering tse fapaneng.
Hobaneng Boron Nitride e Sebelisoa Haholo Mekhoeng ea ho Lubricant ea Mocheso o Phahameng
Sebopeho le Khanyetso ea Mocheso ea Phofo ea Boron Nitride
O ka itshetleha ka phofo ya boron nitride ho boloka sebopeho sa yona leha e pepeseditswe mochesong o feteletseng. Sebopeho sa hexagonal, seo hangata se bitswang "white graphite," se e fa moralo o tiileng le o tsitsitseng. Sebopeho sena se thusa phofo ho hanela ho senyeha ha mocheso o phahameng. O bona sena bokgoning ba yona ba ho sebetsana le mocheso o fihlang ho 3000 °C sepakapakeng sa naetrojene le ho fihla ho 2000 °C maemong a sa jeleng paate. Phofo ena e boetse e tshwana le quartz katolosong ya mocheso empa e na le ho feta ha mocheso ka makgetlo a leshome. Sena se bolela hore e jala mocheso kapele le ka ho lekana, e leng se sireletsang disebediswa tsa hao ho futhumala ho feteletseng.
Mona ke tafole e bonts'ang kamoo phofo ea boron nitride e hlahellang kateng ka ho hanyetsa mocheso le thepa ea mocheso:
| Thepa | Boleng |
|---|---|
| Ho khanna ha mocheso | Ho feta quartz ka makhetlo a leshome |
| Ho hanyetsa mocheso ka naetrojene | Ho fihlela ho 3000 °C |
| Ho hanyetsa mocheso ho sa nke lehlakore | Ho fihlela ho 2000 °C |
| Ho hanyetsa mocheso ka har'a argon | Ho fihlela ho 2800 °C |
| Ho se sebetse ha lik'hemik'hale | Hoo e ka bang litšepe tsohle tse qhibilihisitsoeng |
| Koefficient ea katoloso | E lekana le quartz |
U ka bona hore na ke hobane'ng ha boron nitride e le e sebelisoa haholo mochesong o phahameng litsamaiso tsa mafura. Sebopeho sa eona le ho hanyetsa mocheso li etsa hore e be khetho e ntle bakeng sa mesebetsi e boima.
Ho Hlalosoa Khohlano e Tlase le ho se Sebete ha Lik'hemik'hale
Ha o sebedisa phofo ya boron nitride, o fumana thepa e thellang habonolo mme e sa arabeleng dikhemikhale tse ngata. Phofo ena e na le coefficient e tlase ya ho kgohlano, e bolelang hore dikarolo tse tsamayang di thelela hantle hodima tse ding. Sena se thusa ho fokotsa ho tsofala le ho taboha ha mechini ya hao. Esita le dithempereichara tse hodimo ho fihla ho 1000 °C dibakeng tse etsang hore e be le oxidizing, boron nitride e boloka matla a yona a ho tlotsa.
Boron nitride e sebelisoa haholo lits'ebetsong tsa mafura a mocheso o phahameng hobane e lula e tsitsitse ebile ha e arabele lik'hemik'hale tse matla. Lintlha tse ling ke tsena mabapi le boitšoaro ba eona ba lik'hemik'hale:
- Phofo ea boron nitride e bontša botsitso bo ikhethang ba lik'hemik'hale.
- Ha e kolobise boholo ba litšepe le likhalase tse qhibilihisitsoeng.
- E lula e tsitsitse esita le ha e pepesehetse lintho tse ngata tse mabifi.
- Sebopeho sa eona se ikhethang le ho teteana ha eona ho etsa hore e be molemo liindastering tse ngata.
- E tla ka mefuta e mengata, e kang hexagonal, cubic, le wurtzite, e leng se thusang hore e sebetse hantle maemong a thata.
O ka itšetleha ka boron nitride ho boloka lisebelisoa tsa hau li sebetsa hantle, leha lisebelisoa tse ling li hloleha.
Papiso le Litlolo tsa Setso
U kanna ua ipotsa hore na boron nitride e sebetsa joang e bapisoa le mafura a mang joalo ka graphite kapa molybdenum disulfide. Boron nitride e sebelisoa haholo lits'ebetsong tsa mafura a mocheso o phahameng hobane e sebetsa hantle ho feta likhetho tsena tsa setso ka litsela tse 'maloa.
- Hexagonal boron nitride (h-BN) e tsoela pele ho sebetsa ho fihlela ho 800 °C libakeng tse etsang hore oksijene e be matla, ha molybdenum disulfide e senyeha kapele.
- Litlolo tsa Boron nitride li ka sebetsana le mocheso o fihlang ho 1200 °C maemong a oxidizing, a phahameng haholo ho feta graphite kapa molybdenum disulfide.
- Litlolo tsa HBN li hanela oxidation le ho senyeha ha mocheso, kahoo li nka nako e telele libakeng tse chesang.
- Graphite e lahleheloa ke katleho ea eona mochesong o phahameng hobane e fetoha oxidize habonolo.
Ha o hloka setlolo se ka sebetsanang le mocheso, sa hanela dikhemikhale, mme sa tswela pele ho sebetsa tlasa kgatello, boron nitride e sebediswa haholo ditsamaisong tsa setlolo tse nang le mocheso o phahameng ka lebaka le itseng. E o fa tshebetso e tshepahalang moo ditlolo tse ding di sa kgoneng.
Litšebeliso tsa Lefatše la Sebele le Tšebeliso e Sebetsang
Tšebeliso ea Liindasteri Libakeng tse Chesang Haholo
U tla fumana phofo ea boron nitride liindastering tse ngata tse hlokang setlolo se tšepahalang mochesong o phahameng. Thepa ea eona e ikhethang e etsa hore e be khetho e ntle bakeng sa mesebetsi e thata. U ka bona kamoo mafapha a fapaneng a sebelisang phofo ea boron nitride tafoleng e ka tlase:
| Indasteri | Tlhaloso ea Kopo |
|---|---|
| Libeso tsa Induction | E sebelisoa bakeng sa thepa ea ho kenya kapa ea ho jig mesebetsing ea ho koala kapa ea ho betla. |
| Li-Crucible tsa Tšepe tse Entsoeng ka ho Qhibilihisoa | E sebetsa e le thepa bakeng sa li-crucibles libakeng tse nang le mocheso o phahameng. |
| Lisinki tsa Mocheso le Li-Insulator | E sebetsa e le li-insulator tsa mocheso o phahameng le li-heat sink lits'ebetsong tse fapaneng. |
| Ho Etsa Tšepe | E sebelisoa e le mafura a tiileng lits'ebetsong tse kang ho ntša aluminium le ho betla tšepe. |
| Khalase/Ts'ebetso ea Ceramic | E sebetsa e le sesebelisoa sa ho lokolla hlobo, e fokotsa ho senyeha ha die le ho thibela ho kgomarela nakong ya tshebetso ya mocheso o phahameng. |
Hape o tla bona phofo ea boron nitride sefofaneng le ts'ireletsong. E sireletsa lithebe tsa mocheso, lipeipi tsa nozzle, 'me e tlotsa lienjene tsa rokete le li-satellite. Ts'ebetsong ea tšepe, e sebetsa e le moemeli oa ho lokolla ho lahla 'me e thusa ho fokotsa khohlano le ho tsofala ha ho etsoa.
Boron Nitride e sebelisoa haholo lits'ebetsong tsa mafura a mocheso o phahameng hobane e fana ka botsitso bo phahameng ba mocheso, khohlano e tlase, le ho se sebetse hantle ha lik'hemik'hale. Litšobotsi tsena li thusa ho lelefatsa bophelo ba lisebelisoa tsa hau. Ha u sebelisa lipeipi tsa boron nitride, u fumana:
- Ho hanyetsa mocheso o phahameng bakeng sa libaka tse feteletseng
- Litlolo tse ntle le thepa e sa kolobiseng tse fokotsang khohlano le ho tsofala
- Tšireletso khahlanong le oxidation le kutu
Mekhoa ea ho Rala le ho Sebelisa
O ka sebedisa phofo ya boron nitride ka ditsela tse ngata ho fumana setlolo se setle ka ho fetisisa. Sebopeho le mokgwa o nepahetseng di o thusa ho fihlella sekwahelo se lekanang le tshebetso e nkang nako e telele. Tafole e ka tlase e bontsha mefuta e tlwaelehileng ya ho tlatsa le dikarolelano tsa tsona tse kgothalletswang:
| Mofuta oa Tlatso | Karolo ea Molumo (vol%) | Litšobotsi |
|---|---|---|
| Hexagonal Boron Nitride (h-BN) | 2–20 | E eketsa phallo ea mocheso 'me e fokotsa ho hlaka ha e kopantsoe le li-filler tse chitja. |
| Alumina e chitja (Al₂O₃) | 2–20 | E tlatsa libaka tse ka hare ho sebaka, e ntlafatsa bongata ba liphutheloana le litsela tsa mocheso. |
O ka sebelisa phofo ea boron nitride ka mekhoa e 'maloa:
| Mokhoa | Tlhaloso |
|---|---|
| Ho kenyelletsoa ha metsoako | Kenya boron nitride ho disebediswa tse kopaneng ho ntlafatsa ho tlotsa le ho fokotsa kgohlano le ho tsofala. Sena se sebetsa hantle ho di-composite tsa polymer, tshepe le ceramic. |
| Phetoho ea Bokaholimo | Sebelisa ho kenya dikhemikhale kapa kalafo ya plasma ho thusa boron nitride ho ata ka ho lekana le ho sebetsa hantle mafura. |
| Ntlafatso ea Likaroloana | Fetola boholo le sebopeho sa dikarolwana. Dikarolwana tsa nanoscale hangata di o fa setlolo se setle ka ho fetisisa. |
Keletso: Bakeng sa liphetho tse ntle ka ho fetisisa, khetha boholo bo nepahetseng ba likaroloana le karolelano ea motsoako bakeng sa ts'ebeliso ea hau. Boloka phofo ea hau ea boron nitride sebakeng se pholileng, se omileng ho e boloka e le boemong bo botle.
Ho Hlōla Mathata a Tloaelehileng a ho Tlotsa
Tikoloho tse nang le mocheso o phahameng li baka mathata a mangata a ho tlotsa. U ka 'na ua tobana le khohlano ea ho kopana, ho ruruha, le liphoso tsa bokaholimo, haholo-holo nakong ea lits'ebetso tse kang ho etsoa ha aluminium ka superplastic. Ho ruruha ho etsahala ha bokaholimo bo khomarelana 'me bo baka tšenyo.
Phofo ea boron nitride e u thusa ho rarolla mathata ana. E sebetsa e le mokoallo o matla pakeng tsa libaka, e fokotsa khohlano le ho thibela ho ruruha esita le mochesong o fihlang ho 800°C (1472°F). U fumana ts'ebetso e boreleli le liphoso tse fokolang.
- E fokotsa khohlano ea intermetal
- E thibela ho teneha le tšenyo ea bokaholimo
- E boloka lisebelisoa li sebetsa nako e telele mochesong o feteletseng
Ha o sebedisa phofo ya boron nitride, o ka tshepa hore mechine ya hao e tla sebetsa hantle le ho nka nako e telele. Boron Nitride e sebediswa haholo ditsamaisong tsa mafura a mocheso o phahameng hobane e rarolla mathata ao thepa e meng e ke keng ya a sebetsana le ona.
O ka tshepa phofo ya boron nitride ho boloka mechine e sebetsa hantle, esita le mochesong o feteletseng. Thepa ya yona e ikgethang e e arola ho ditlolo tsa setso.
| Tšobotsi | Tlhaloso |
|---|---|
| Ho Tsitsisa ha Thermal | E boloka mafura mochesong o phahameng |
| Ho se sebetse ha lik'hemik'hale | E sebetsa hantle ho feta mafura a tlhaho libakeng tse thata |
| Likopo | E sebelisoa mechineng ea lifofane, ea likoloi le ea indasteri |
- U tla bona tlhoko e ntseng e hola indastering ea likoloi, tlhahiso le lifofane.
- Likhamphani li batla ts'ebetso e ntle le ho se senyehe ha lisebelisoa.
- Phofo ea boron nitride e fihlela litlhoko tsena ka ts'ebetso e tšepahalang.
LBH
Ke eng e etsang hore phofo ea boron nitride e be betere ho feta graphite bakeng sa ho tlotsa mocheso o phahameng?
U fumana botsitso bo phahameng ba mocheso le ho se sebetse hantle ha lik'hemik'hale ka boron nitride. E boloka matla a ho tlotsa mochesong moo graphite e hlolehang.
Na o ka sebedisa phofo ya boron nitride dijong kapa ditlolong tsa botle?
E, o ka khona. Phofo ea boron nitride ha e na chefo ebile e bolokehile bakeng sa ho sebelisoa litlolong le lisebelisoa tse ling tsa ho lokisa lijo.
U lokela ho boloka Phofo ea High Purity Hexagonal Boron Nitride joang?
Boloka phofo ea hao sebakeng se pholileng, se omileng, le se nang le moea o kenang. Sena se boloka sehlahisoa se le foreshe 'me se boloka ts'ebetso ea sona e sebetsa.