PTFE olugoye olw’ebbugumu
Eky’okuddamu kirimu nuanced. Ensengekera ya molekyu ya PTFE egiwa okuziyiza okw’enjawulo mu bitundu ebisinga obungi eby’okukola, naye okusukka 260°C kireeta okuvunda okutakyuka. Era wadde ng’ebbugumu eryonnyogovu lilongoosa amasannyalaze, lifuula ekizigo ekyo okumenya.
Aokai PTFE egezesezza eby’obugagga by’okuziyiza omuliro mu bbugumu erisukkiridde. Ekiwandiiko kino kimenyaamenya omulimu mu ngeri ssatu: okukola okwa bulijjo (-180°C okutuuka ku 260°C), ebbugumu erisukkiridde (>260°C), n’ebbugumu eri wansi (<0°C), n’ebikulu ebikwata ku buziyiza, amaanyi ga dielectric, n’ebigendererwa eby’omugaso.
Normal Operating Range: -180°C okutuuka ku 260°C – Okuziyiza okunywevu ennyo
Mu kifo kino, olugoye lwa PTFE olw’ebbugumu eringi lukuuma okuziyiza amasannyalaze okw’enjawulo era okunywevu – enkizo enkulu ewagira okukozesebwa kwayo mu makolero okubunye.
1. Obuzito & Obuziyiza obw’okungulu
Ebbugumu
Obuziyiza bw’obuzito (Ω·cm) .
Ekitegeeza
Embeera (25°C) .
10⊃1;7 – 10⊃1;8
Kirungi nnyo – mu bisinga obulungi mu insulators
200°C
10⊃1;⊃3; – 10⊃1;4
Akyali wala nnyo okusinga ebintu ebisinga ebya bulijjo
260°C
>10⊃1;⊃2; (okuteebereza)
Akyakola ku nkola nnyingi
Enkola: Obuziyiza bukka mu kigero nga ebbugumu lirinnya kubanga ebbugumu erya waggulu linyweza entambula y’ebbugumu ey’enjegere za molekyu za PTFE era ne lyanguya okutambula kw’abasitula obucaafu obutonotono. Wabula ne ku 200°C, PTFE esinga obuveera bwa yinginiya obusinga obungi ku bbugumu erya bulijjo.
Weetegereze ku buziyiza obw’okungulu: Obuziyiza obw’okungulu bukwatibwa nnyo obunnyogovu bw’ekifo. PTFE kumpi tekola mazzi; obunnyogovu obw’okungulu bufuumuuka ku bbugumu erya waggulu, ne buleeta okuziyiza okw’okungulu okunywevu okusinga wansi w’embeera z’ekisenge ekirimu obunnyogovu obw’amaanyi.
2. Amaanyi ga Dielectric (Volutalo lw’okumenya) .
Ekendeera ng’ebbugumu lirinnya. Entambula y’ebbugumu lya molekyu eyongezeddwayo efuula ekintu ekyo okubeera mu bulabe bw’okwonooneka kw’ekifo ky’amasannyalaze.
Okuva ku bbugumu erya bulijjo okutuuka ku 200°C, amaanyi ga dielectric ag’ekiseera ekitono gagwa nga 20%–40% . .
Wadde kiri kityo, olugoye olwa premium nga luweza mm 0.1 obuwanvu lukyagumira kilovolts eziwerako (oba makumi ga kilovolts ku grade ezisinga obunene) ku 200°C – robust insulation capacity retained.
3. Ensonga ya Dielectric Constant & Dissipation Factor – Enkyukakyuka Entono
Eby'obwa nannyini
Omuwendo (-100°C okutuuka ku 250°C)
Okutebenkera
Ekikyukakyuka kya dielectric (Dk) .
2.0 – 2.1
Kumpi nga fulaati
Ensonga y’okusaasaana (tan δ) .
0.0002 – 0.001
Ultra-low nnyo
Lwaki kino kikulu: PTFE's highly symmetric molecular structure ne ultra-low polarization zikakasa okutambuza signal okutebenkedde n'okukola ebbugumu ultra-low wansi w'obuweereza bwa high-frequency & high-temperature. Kino kiwa PTFE ebisaanyizo ng’ekintu ekirungi ennyo ekiziyiza firikwensi eya waggulu okukozesebwa mu RF ne microwave.
Aokai PTFE olugoye olw’ebbugumu eringi lulambikibwa bakasitoma olw’okuziyiza tulansifooma eya frequency enkulu olw’okuziyiza Dk (2.05±0.05) ne tanδ entono ennyo (0.0002-0.0005) okubuna -50°C okutuuka ku 200°C. Tuwa lipoota z’okugezesa eby’obugagga bya dielectric nga tusabye.
Ekifo eky’ebbugumu eringi ennyo: Waggulu wa 260°C – Okuvunda okutakyuka
Okusukka ebbugumu ly’obuweereza erikkirizibwa erya PTFE ery’ekiseera ekiwanvu kireeta okwonooneka kw’omubiri n’eddagala okutakyuka – so si nkyukakyuka mu by’obugagga ezikyusibwa.
Ebbugumu erisangibwa
Embeera y’ebintu
Embeera y’okuziyiza okuyingira mu nnyumba
260°C – 327°C
Okusiiga kwa PTFE kugonza; amaanyi g’ebyuma gafiiriddwa nnyo. Stress ey’ebweru oba omugugu gw’amasannyalaze kyangu okuleeta okukyukakyuka kw’ekizigo n’okuboola → okulemererwa kw’ebyuma-amasannyalaze okugatta ne bwe kiba nti ebipimo by’amasannyalaze ebikulu bisigala nga bikkirizibwa
Tekyesigika – akabi k’okuboola
Waggulu wa 327°C
Atuuka ku kifo kya PTFE eky’okusaanuuka ekya kirisitaalo. Solid PTFE efuuka high-elastic oba gel state, okufiirwa obulungi bw’enzimba
Kumpi alemererwa ddala
Waggulu wa 400°C
Okuvunda okw’amaanyi okw’ebbugumu kufulumya ggaasi ez’obulabe ezilondoola. Carbonization ne conductive passages zikola munda mu material → volume resistivity sharply drops, insulation esaanawo enkalakkalira
Okulemererwa okujjuvu – amakubo agatambuza amazzi gakola
Okulabula okukulu: Wadde ng’olugoye lwa fiberglass olwa base lugumira 550-750°C nga terunnagonvuwa, fiberglass etaliiko langi enyiga mangu obunnyogovu oluvannyuma lw’okulemererwa okusiiga kwa PTFE era tesobola kwetongodde kukola ku insulation ya vvulovumenti eya waggulu.
Obugumu obutono: Wansi wa 0°C – Amasannyalaze agalongooseddwa naye nga ga makanika agatali manywevu
Eby'obwa nannyini
Effect Wansi wa 0°C
Ebitegeeza mu nkola
Okuziyiza eddoboozi (volume resistivity).
Okwongera – ebbugumu erya wansi lisiba entambula y’olujegere lwa molekyu, liremesa okutambula kw’abasitula
Okuziyiza amasannyalaze kirungi okusinga ku bbugumu erya bulijjo
Amaanyi ga dielectric
Okwongera – ebintu bigumira nnyo okumenya
Kirungi nnyo ku nkola za cryogenic insulation
Okukyukakyuka mu byuma
PTFE eyita mu nkyukakyuka ya kirisitaalo ku ~19°C; kifuuka ekiwujjo ekimanyiddwa ennyo wansi wa -79°C
Okubeebalama oba okukuba kuyinza okwatika ekizigo kya PTFE → kireeta obulema mu insulation
Ebikulu by’ogenda okutwala: Wadde ng’amasannyalaze ganywezeddwa ku bbugumu eri wansi, ekizigo kya PTFE kifuuka ekiwujjo. Ku nkola za cryogenic (okugeza, layini za nayitrojeni ez’amazzi, magineeti ezitambuza ennyo), kakasa nti olugoye terufumita nnyo oba okunyigirizibwa okw’ebyuma wansi wa -79°C. Oluvannyuma lw’okukutuka, obulungi bwa insulation bubula awatali kulowooza ku by’amasannyalaze.
Mu bufunze – Sigala Mu 260°C okufuna Insulation eyesigika
Ebbugumu erisangibwa
Enkola ya Insulation
Embeera y’ebyuma
Okuteesa
-180°C okutuuka ku 260°C
Kirungi nnyo – kinywevu, kiziyiza nnyo, kifiirwa kitono
Flexible (labe oba brittleness wansi wa -79°C)
Tekiriiko bulabe eri okukozesebwa obutasalako
260°C – 327°C
Okuvunda – okusiiga okugonvu kuyinza okukyukakyuka/okuboola
Okugonza
Tekyesigika – weewale okubeera mu mbeera ey’olubeerera
327°C – 400°C
Kumpi okulemererwa – okusaanuuka, okufiirwa kw’enzimba
Gel/amazzi
Si ya kukozesa masannyalaze
>400°C
Okulemererwa okw’olubeerera – carbonization ekola amakubo agatambuza
Ebivunze
Catastrophic – zzaawo mu bwangu
Mu bufunze , munda mu bbugumu ery’okukola erisemba obutasalako (≤260°C), ebbugumu liteeka okukosa okubi okutali kwa maanyi ku PTFE olugoye olw’ebbugumu eringi’s amasannyalaze insulation. Obuziyiza bwa voliyumu busigala waggulu wa 10⊃1;⊃3; Ω·cm ku 200°C; ekikyukakyuka kya dielectric kisigala ku 2.0-2.1; ensonga y’okusaasaana wansi wa 0.001. Kino kifuula PTFE ekimu ku bintu ebisinga okutebenkera ebiziyiza ebbugumu erya waggulu ebisangibwawo – naddala eby’omuwendo mu kukola emirimu egy’amaanyi nga polimeeri endala zifiirwa nnyo.
Oluvannyuma lw’ebbugumu erisukkiridde okusukka 260°C, okulemererwa kw’okuziyiza okuziyiza kutandika okuva mu kugonza n’okukyukakyuka okw’ebyuma, okukkakkana nga kufuuse okumenya kw’amasannyalaze okujjuvu. Waggulu wa 400°C, okufuuka kaboni kutondawo amakubo agatambuza ag’olubeerera. Wansi wa 0°C, eby’amasannyalaze bitereera, naye okumenya kw’ebyuma kuli mu kabi ak’okukutula ekizigo.
Weetaaga olugoye lwa PTFE olw’ebbugumu eringi nga lulina eby’obugagga ebikakasibwa eby’okuziyiza ebbugumu ku bbugumu lyo? Aokai PTFE egaba data enzijuvu ey’okugezesa dielectric okuva ku -70°C okutuuka ku 260°C. Tukwasaganye n’ebbugumu lyo ery’okukola, vvulovumenti, ne frequency.
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