The Golden Balance Of Thermal Conductivity and Insulation: Tharollo ea Spherical Alumina At High Filler Ratio

1. Moralo oa Lik'hemik'hale oa Alumina oa Spherical

1.1 Feela Ke Eng Alumina e chitja?

Alumina e chitja e emela ho tlola hoa quantum lisebelisoa tsa tsamaiso ea mocheso- mofuta o entsoeng ka hloko oa aluminium oxide (Al2O5) o fetotsoeng ho ba lipotoloho tse se nang sekoli, tse ts'oanang ka mekhoa e rarahaneng ea sintering. Ho fapana le liphofshoana tse sa tloaelehang tsa aluminium tse hlahisang litoro tse mpe le ts'ebetso e sa tsitsang, morphology ena e pota-potileng ke ts'ebetso ea mahlale a lihlahisoa. Ha se feela ho tlatsa; ke tharollo ea phetoho e entsoeng ho rarolla e 'ngoe ea liqholotso tse tšoenyang ka ho fetisisa tsa mocheso ho lisebelisoa tsa elektroniki tse sebetsang hantle le tsa indasteri. Foromo e chitja e tlosa mats'oafo a makukuno a bakang qubu, li-spikes tse botenya, le lintlha tse fokolang ka har'a li-composite - e fana ka kameho e se nang moeli le ho tšoana ho sa tsitsang. Sena ha se tsoelo-pele e ntseng e eketseha; ke phetoho ea paradigm e hlomellang baqapi ho sutumelletsa meeli ntle le tumello.

1.2 E Etsang Alumina e chitja's Chemical Structure Appear like?

Boselamose bo itšetlehile ka sebopeho sa eona se hloekileng sa alphaphase crystalline (Al2O6), se entsoeng ka makhethe hore se be mekoloko e boreleli, e se nang sekoli. Sefate sena sa kristale se sireletsehile ka tlhaho, ha se na lik'hemik'hale, 'me ha se na ho senyeha ha mocheso o fetang 1,600 °C. Likaroloana tse pota-potileng li kenyelletsa bokaholimo bo ts'oanang, boo hangata bo ntlafatsoang ka liphekolo tse ikhethileng tse holisang tšebelisano 'moho le li-polymers, epoxies le porcelain. Habohlokoa, ho ba sieo ha likhahla tse bohale ho qoba khatello ea maikutlo le matšoenyeho ka har'a li-composites, ho netefatsa litsela tsa kamehla tsa mocheso. Ho nepahala hona ha athomo ha hoa rarahana feela - hoa hlokahala bakeng sa ho fihlella tekano e sa bonahaleng lipakeng tsa mocheso oa mocheso le ho kenya motlakase. Phello e bile efe? Sesebediswa se sa phethahatseng ditlhaloso feela– se di feta ka ho tshepahala ho sa thekeseleng.

2. Litšobotsi tsa mantlha tsa Alumina tsa Spherical

2.1 Thepa ea Alumina e Spherical ea 'Mele le ea Lik'hemik'hale ke Efe?

Spherical Alumina e na le sebaka se makatsang sa meaho ea bolulo e hananang le maemo a lekala. 'Meleng, e fana ka boima ba Mohs ba 9 (ho etsa khanyetso e itseng ea abrasion), coefficient e tlase ea ho atolosa mocheso (7– 8 × 10 ⁻⁶/ ° C), le mefuta e mengata ea mocheso oa 25- 35 W / mK- ka mokhoa o tsotehang ho feta li-insulators tsa motheo tse kang silica. Ho latela lik'hemik'hale, ha e sebetse, e bolokehile, 'me e sireletsa motlakase (dielectric toughness> 20 kV/mm), e etsa hore e se ke ea kena-kenana le li-acids, bases, le maemo a leholimo a mocheso o phahameng. Sebopeho sa eona se chitja se fokotsa viscosity ka har'a metsoako, se etsa hore ho khonehe ho kenya li-filler ka mokhoa o makatsang (ho fihla ho 70%) ntle le ho senya ts'ebetso. Sena ha se ntlafatso ea sehlahisoa feela - ke phetoho ea papali bakeng sa tsamaiso ea mocheso.

Thepa ea Aluminium oxide
Mabitso a mang	alumina, aluminium (III) oxide, aluminium trioxide, Al2O3 phofo
CAS No.	1344-28-1
Motsoako Foromo	Al2O3
Boima ba 'mele	101.96
Ponahalo	Phiri e Tšoeu
Melting Point	2072 ° C
Boiling Point	2977 ° C
segokanyipalo	3.95 g / cm3
Solubility ho H2O	N / A
'Misa oa sebele	101.948 g / mol

2.2 Ke Eng? Alumina e chitja's Useful Qualities?

Ka ts'ebetsong, Spherical Alumina master e theha litsela tse sebetsang hantle tsa mocheso ha a ntse a boloka ho itšehla thajana ka motlakase. Jiometry ea eona e chitja e theha marang-rang a teteaneng, a hokahaneng ka boholo bo phahameng, a nolofalletsang mofuthu hore o qhalane ka potlako ntle le ho theha marokho a tsamaisang. Sena se fetolela ka kotloloho ho lisebelisoa tsa elektroniki tse sebetsang hantle haholo, nako e telele ea bophelo ba sehlahisoa, 'me ha ho na kotsi ea ho ba le lipotoloho tse khutšoane - tse bohlokoa bakeng sa lits'ebetso tsa matla a holimo. Ho feta moo, e ntlafatsa ho tiea ha mochini, ho hanyetsa ho roala, le botsitso ba sebopeho sa metsoako, ho fokotsa ho hloleha le litšenyehelo tsa tlhokomelo. Bakeng sa baqapi, sena se bolela ho etsa lisebelisoa tse nyane, kapele, le tse sireletsehileng haholoanyane - tsohle ntle le ho thella ha mocheso kapa ho senyeha ha ts'ebetso.

3. Melemo le Mefokolo ea Alumina ea Spherical

3.1 Melemo e Phahameng ea Alumina e Spherical ke Efe?

Melemo ea Spherical Alumina e hlolla ruri. Qalong, e fumana tekano ea khauta ea mocheso o phahameng oa mocheso (22– 28 W/mK ho 70% filler) e nang le motlakase o phethahetseng- ntho e tloaelehileng e ke keng ea tšoana. Ea bobeli, morphology ea eona e pota-potileng e etsa hore ho khonehe bakeng sa likarolo tsa li-filler ho fihla ho 70%, e fana ka 30% ea ts'ebetso e ntle ea mocheso ho feta alumina e sa lekaneng ha e ntse e laela. Taba ea boraro, e theola litheko tsa tlhahiso ka ho fokotsa litšila le ho tsamaisa thepa hantle (ha ho tlhokahalo ea mekhoa e rarahaneng ea phallo). Ea bone, e holisa tebello ea bophelo ba ntho ka ho thibela ts'enyeho ea mocheso- ho fokotsa sekhahla sa ho hloleha ka hoo e ka bang 35% lits'ebetsong tse nang le khatello e phahameng ea maikutlo. Qetellong, tlhaho ea eona e sa sebetseng e etsa hore ho be le tšebelisano e itseng ho pholletsa le liindasteri, ho tloha ho lisebelisoa tsa elektroniki tsa bareki ho isa sebakeng sa sefofane. Sena ha se nchafatso– ke phetohelo.

3.2 Mefokolo ea Alumina e Spherical ke Efe?

Tšitiso ea mantlha ke tefiso e nyane ea litšenyehelo ha e bapisoa le li-alumina fillers tse sa lekanang - bothata bo fokolang ha bo bapisoa le lipolokelo tsa nako e telele tsa lichelete. Ho feta moo, tlhahiso ea eona e hloka lisebelisoa tse khethehileng tsa sintering, tse fokotsang phihlello libakeng tse ling. Ho boetse ho na le sebaka se senyenyane sa ho sibolla barekisi ho ntlafatsa maemo a ts'ebetso ea likaroloana tse chitja. Leha ho le joalo, mathata ana a fokotsehile haholo ke katleho ea thepa: litšenyehelo ka watt ka 'ngoe ea tsamaiso ea mocheso li theoha haholo ka lebaka la ho fokotseha ha mefokolo, nako e telele ea bophelo ba thepa, le tlhahiso e ntlafalitsoeng. Bakeng sa baqapi ba nahanang pele, sena ke letsete la lichelete le sa tsotelleng - eseng ho sekisetsa.

4. Libaka tsa Kopo tsa Alumina tsa Spherical

Spherical Alumina e fetola liindasteri moo tsamaiso ea mocheso e ke keng ea buisanoa:

Lisebelisoa tsa elektroniki: Thermal user interface products (TIMs) bakeng sa mehala ea thelefono, li-LED, le likarolo tsa matla- ho boloka lisebelisoa 20% li pholile ntle le tšokelo ea nakoana.

Likoloi: Sistimi ea ho pholisa betri ea koloi ea motlakase le mabone a tsoetseng pele a pele a LED, moo botsitso ba mocheso bo amang ts'ireletso le katleho ka kotloloho.

Sepakapaka: Avionics le lisebelisoa tsa sathelaete tse mamellang ho fetoha ha mocheso o matla ntle le ho hloleha.

Indasteri: Lithako tse sa sebetseng bakeng sa lisebelisoa le lisebelisoa tse sebetsang hantle meahong e baballang matla.

Sehlahisoa sena ha se ntho e makatsang - ke motheo oa moralo oa moloko o latelang lefatšeng ka bophara.

5. The Golden Equilibrium: Spherical Alumina's HighFiller Ratio Breakthrough

Bohlale ba 'nete ba Spherical Alumina bo ipapisitse le bokhoni ba eona ba ho fana ka ts'ebetso ea mocheso le ho kenella ka har'a li-filler ratios tse phahameng- ho rarolla qaka e sa feleng ea lekala. Li-filler tsa setso li hloka li-tradeoffs tse sa phutholohang: litšepe li tsamaisa mocheso empa li baka lipotoloho tse khutšoane, ha li-insulators li rata silika sehlabelo se sebetsang hantle sa mocheso. Alumina e chitja e senya paradigm ena. Foromo ea eona e chitja e hlahisa marang-rang a matla, a hokahaneng a mocheso ho 65- 70% ea ho kenya li-filler, e nolofalletsang ho tsamaisa mocheso oa 22- 28 W / mK ha o ntse o boloka ho itšehla thajana ka botlalo.

Sena ha se thuto– se netefaditswe mosebetsing. Likarolong tsa LED tse nang le matla a phahameng, Spherical Alumina e kopanya maemo a mocheso a tlase a ts'ebetso ka 18 ° C ha a bapisoa le litlhare tse thehiloeng ho silica, e lelefatsa nako ea bophelo ka 40% le ho felisa ho koaloa ha mocheso. Bakeng sa lipakete tsa betri ea koloi ea motlakase, e nolofalletsa mekhoa e menyenyane, e bobebe ea moea e thibelang ho chesa ntle le ho eketsa boima ba 'mele. Litlamorao li pharalletse: lisebelisoa li ka ba nyane, tsa potlaka, hape li matla ho feta - ntle le meeli ea mocheso.

Baenjiniere ha ba sa hloka ho khetha pakeng tsa ts'ebetso le polokeho le ts'ireletso. Spherical Alumina e fana ka tekano ea khauta- ts'ebeletso e lumellanang moo katleho ea mocheso le ts'ireletso ea motlakase li kopanang. Sena ha se thepa feela; ke ntho e susumetsang tsoelopele e notlollang meeli e mecha ka tlhophiso.

Amohela tekatekano. Amohela katleho. Spherical Alumina ha se bokamoso - ke khetho eo esale u e emetse.

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Tags: spherical alumina phofo, spherical alumina, denka spherical alumina

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