Ilaphu le-PTFE elinobushushu obuphezulu lisetyenziswa ngokubanzi njengokugqunywa kombane ekubambeni ucingo, iileya ze-transformer, i-motor windings, kunye neesekethe eziphezulu ze-frequency. Kodwa iqondo lobushushu liyatshintsha - ukusuka kwingqele eqhaqhazelisa amazinyo ukuya kubushushu obugqithisileyo - kuguqula indlela yokuziphatha kwayo. Ngaba unokuthembela kwilaphu le-PTFE kwi-200 ° C? Kwenzeka ntoni ngaphezu kwama-260°C?
Impendulo i-nuanced. Ulwakhiwo lwemolekyuli ye-PTFE inika ukugquma okugqwesileyo kulo lonke uluhlu lwayo lokusebenza, kodwa ngaphezulu kwe-260°C ixhokonxa ukuthotywa okungenakubuyiseka. Kwaye ngelixa amaqondo okushisa abandayo aphucula iimpawu zombane, enza ukuba i-coating brittle.
I-Aokai PTFE ivavanye iimpawu zokugquma kubushushu obugqithisileyo. Eli nqaku liqhekeza ukusebenza kwiindidi ezintathu: ukusebenza okuqhelekileyo (-180 ° C ukuya kwi-260 ° C), ukuphakama okuphezulu (> 260 ° C), kunye nokushisa okuphantsi (<0 ° C), kunye nedatha ephambili kwi-resistantivity, amandla e-dielectric, kunye neziphumo eziphathekayo.
Uluhlu lokuSebenza oluQhelekileyo: -180 °C ukuya kwi-260 °C - Ukufakwa kwe-Insulation ephezulu
Kulo mda, ilaphu lobushushu obuphezulu le-PTFE ligcina ukugqunyelelwa kombane okugqwesileyo kwaye okuzinzileyo - eyona nto iluncedo exhasa usetyenziso lwayo olubanzi lwemizi-mveliso.
1. Umthamo kunye nokuqina koMphezulu
Ubushushu |
Ukuxhathisa uMqulu (Ω·cm) |
Intsingiselo |
I-Ambient (25°C) |
10⊃1;⁷ – 10⊃1;⁸ |
Okugqwesileyo - phakathi kwezona zigqudu zibalaseleyo |
200°C |
10⊃1;⊃3; – 10⊃1;⁴ |
Isengaphezulu kakhulu kunezona zinto ziqhelekileyo |
260°C |
>10⊃1;⊃2; (qikelele) |
Isasebenza kwizicelo ezininzi |
I-Mechanism: Ukuchasana kwehla ngokulinganayo ngokunyuka kweqondo lokushisa ngenxa yokuba ubushushu obuphezulu buqinisa intshukumo ye-thermal ye-PTFE yamakhonkco eemolekyuli kwaye ikhawulezisa ukufuduka kwabathwali bokungcola. Nangona kunjalo, nakwi-200 ° C, i-PTFE igqwesa uninzi lweeplastiki zobunjineli kwiqondo lokushisa.
Qaphela ukuxhathisa umphezulu: Ukumelana nomphezulu kuchaphazeleka kakhulu kukufuma kwe-ambient. I-PTFE phantse ayiyo-hygroscopic; Ukufuma komphezulu kuba ngumphunga kumaqondo obushushu aphakamileyo, kuzisa ukugquma komphezulu okuzinzile kunaphantsi kweemeko zegumbi lokufuma okuphezulu.
2. Amandla eDielectric (Ukuqhekeka kombane)
Yehla njengoko ubushushu bunyuka. Intshukumo ye-thermal ye-molecular aggravated yenza ukuba izinto zisengozini ngakumbi kumonakalo wombane.
Ukusuka kwiqondo lobushushu begumbi ukuya kwi-200 ° C, amandla e-dielectric yexesha elifutshane awela malunga ne- 20% -40%.
Nangona kunjalo, ilaphu leprimiyamu elimalunga ne-0.1 mm ubukhulu lisanokumelana neekhilovolthi ezininzi (okanye amashumi eekilovolthi kumabanga atyebileyo) kuma-200°C – amandla ogqume owomeleleyo agciniwe.
3. I-Dielectric Constant & Factor Dissipation - i-Fluctuation encinci
Ipropati |
Ixabiso (-100°C ukuya ku-250°C) |
Uzinzo |
Idielectric constant (Dk) |
2.0 – 2.1 |
Phantse flat |
Umba wokulahla (tan δ) |
0.0002 - 0.001 |
Kakhulu-phantsi |
Kutheni le nto ibalulekile: Isakhiwo semolekyuli se-PTFE esilingeneyo kunye ne-ultra-low polarization isiqinisekiso esizinzileyo sokuhanjiswa komqondiso kunye nokuveliswa kobushushu obuphantsi kakhulu phantsi kwe-frequency ephezulu kunye nenkonzo yobushushu obuphezulu. Oku kufaneleka i-PTFE njengento efanelekileyo yokugquma i-high-frequency insulating ye-RF kunye ne-microwave applications.
Ilaphu le- Aokai PTFE lobushushu obuphezulu licaciswa ngabathengi be-high-frequency transformer insulation insulation ngenxa yokuqina kwayo Dk (2.05±0.05) kunye ne-ultra-low tanδ (0.0002-0.0005) ngapha kwe -50°C ukuya kwi-200°C uluhlu. Sinikezela ngeengxelo zovavanyo lwepropathi ye-dielectric xa uceliwe.
Uluhlu lobushushu obuphezulu obugqithisileyo: Ngaphezu kwe-260 ° C - Ukuthotywa okungenakuBuyiswa
Ukodlula ubushushu benkonzo evumelekileyo yexesha elide ye-PTFE ibangela ukuwohloka komzimba kunye neekhemikhali okungenakuguquleka – hayi ukuguquguquka kwepropathi.
Uluhlu lobushushu |
Imeko yezinto eziphathekayo |
Ubume beInsulation |
260°C – 327°C |
PTFE ukutyabeka ithambe; amandla oomatshini alahleka kakhulu. Uxinzelelo lwangaphandle okanye umthwalo wombane ngokulula ubangela uguquko olugqumayo kunye nokugqobhoza → ukusilela okudityanisiweyo koomatshini nombane nokuba iiparamitha ezingundoqo zihlala zamkelekile. |
Ukungathembeki - umngcipheko wokugqobhoza |
Ngaphezulu kwe-327°C |
Ifikelela kwindawo ye-PTFE's crystalline yokunyibilika. I-PTFE eSolid ijika ibe yi-high-elastic okanye i-gel state, ilahlekelwe yintembeko yesakhiwo |
Phantse asilele ngokupheleleyo |
Ngaphezu kwama-400°C |
Ukubola okumandla okushushu kukhupha umkhondo weegesi eziyingozi. I-Carbonization kunye neepaseji eziqhubayo zenza ngaphakathi kwemathiriyeli → ukuxhathisa umthamo kwehla ngokukhawuleza, ukugquma kutshatyalaliswe ngokusisigxina |
Ukungaphumeleli ngokupheleleyo - iifom zeendlela zokuqhuba |
Isilumkiso esibalulekileyo: Nangona isiseko selaphu le-fiberglass imelana ne-550-750 ° C ngaphambi kokuba ithambe, i-fiberglass engafakwanga ifunxa ngokulula ukufuma emva kokusilela kokugquma kwe-PTFE kwaye ayikwazi ngokuzimeleyo ukugquma i-voltage ephezulu.
ULuhlu loBubushushu obuphantsi: Ngezantsi kwe-0°C – Ukuphuculwa koMbane kodwa koomatshini abaBrittle
Ipropati |
Isiphumo Ngaphantsi kwe-0°C |
Intsingiselo esebenzayo |
Ukuxhathisa umthamo |
Ukunyuka - ubushushu obuphantsi buvala ukunyakaza kwe-molecular chain, kuthintela ukufuduka komthwali |
Ukufakwa kombane kubhetele kunobushushu begumbi |
Amandla e-Dielectric |
Ukonyuka-izinto eziphathekayo zixhathisa ngakumbi ekuqhekekeni |
Igqwesileyo kwizicelo zokugquma i-cryogenic |
Ukuguquguquka komatshini |
I-PTFE idlula kwinguqu yesigaba sekristale kwi ~19°C; iba brittle ngokuphawulekayo ngaphantsi kwe -79°C |
Ukugoba okanye impembelelo inokuqhekeka i-PTFE yokwambathisa → yenza iziphene zokugquma |
I-key takeaway: Ngaphandle kokunyuswa kokugqunywa kombane kumaqondo obushushu aphantsi, i-PTFE yokwambathisa iba brittle. Ukusetyenziswa kwe-cryogenic (umzekelo, imigca yenitrogen engamanzi, iimagnethi ezinkulu), qinisekisa ukuba ilaphu aligotywanga okanye licinezeleke ngoomatshini ngaphantsi -79°C. Emva kokuqhekeka, ukunyaniseka kwe-insulation kulahleka kungakhathaliseki iimpawu zombane.
Isishwankathelo - Hlala ngaphakathi kwe-260 ° C ye-Insulation ethembekileyo
Uluhlu lobushushu |
Ukusebenza kweInsulation |
iMechanical State |
Ingcebiso |
-180°C ukuya kuma-260°C |
Okugqwesileyo - okuzinzile, ukuxhathisa okuphezulu, ilahleko ephantsi |
Iyabhetyebhetye (jonga ukuba brittleness ngaphantsi -79°C) |
Ikhuselekile ukusetyenziswa rhoqo |
260°C – 327°C |
Ukwehlisa isidima – ukugquma okuthambileyo kunokonakala/kugqobhoze |
Ukuthambisa |
Ukungathembeki - kunqande utyhileko oluzinzileyo |
327°C – 400°C |
Ukusilela okukufutshane - ukunyibilika, ukulahleka kwesakhiwo |
Ijeli/ulwelo |
Ayiyokusetyenziswa kombane |
>400°C |
Ukungaphumeleli okusisigxina - i-carbonization idala iindlela zokuqhuba |
Ibolile |
Intlekele - buyisela ngokukhawuleza |
Isishwankathelo , ngaphakathi kweqondo lobushushu eliqhubekayo elicetyiswayo (≤260°C), iqondo lobushushu libeka ifuthe elibi elingenamsebenzi kwi-PTFE yobushushu obuphezulu bokufakelwa kombane kwelaphu. Ukumelana nomthamo kuhlala kungaphezulu kwe-10⊃1;⊃3; Ω·cm kwi-200°C; ukuhlala rhoqo kwe-dielectric kwi-2.0-2.1; i-disipation factor engaphantsi kwe-0.001. Oku kwenza i-PTFE ibe yenye yezona zinto zizinzileyo zokugquma ubushushu obuphezulu zikhoyo-ibaluleke ngakumbi kwizicelo ze-frequency ephezulu apho ezinye iipholima zifumana ilahleko enkulu.
Nje ukuba ubushushu bugqithise ngaphaya kwe-260°C, ukungaphumeleli kokugquma kwe-insulation kuqala ukusuka ekuthambiseni ngoomatshini kunye nokuguqulwa, ekugqibeleni kuguqukele ekuqhekekeni kombane ngokupheleleyo. Ngaphezulu kwe-400 ° C, i-carbonization idala iindlela zokuqhuba ezisisigxina. Ngaphantsi kwe-0°C, iipropati zombane ziyaphucuka, kodwa ukonakala koomatshini kunobungozi bokuqhekeka kwengubo.
Ngaba ufuna ilaphu le-PTFE lobushushu obuphezulu obuneempawu zokugquma eziqinisekisiweyo kuluhlu lwakho lobushushu? I-Aokai PTFE ibonelela ngedatha epheleleyo yovavanyo lwe-dielectric ukusuka ku-70°C ukuya kuma-260°C. Qhagamshelana nathi ngeqondo lobushushu obusebenzayo, umbane wombane, kunye neemfuneko zamaza.
Le datha yobugcisa ingentla inikwe ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba ufuna ezinye iinkcukacha zobugcisa, izisombululo zesicelo, kunye nokuveliswa okwenziwe ngokwezifiso kweemveliso ezipheleleyo ezibandakanya i-PTFE yobushushu obuphezulu belaphu, i-PTFE iteyiphu yokuncamathela, ibhanti lokuhambisa i-mesh ye-PTFE, ibhanti lomatshini wokudibanisa elingenamthungo, ilaphu le-PTFE elisecaleni elinye kunye nobushushu obuphezulu obuxhathisayo kunye nelaphu le-fiberglass , nceda uqhagamshelane nathi:
Sibambelela kubuchwephesha kunye nemfezeko ukuhambisa izisombululo zemizi-mveliso ezilungelelanisiweyo kunye nenkxaso yokuthengisa emva kokuthengisa.
