Ni PTFE kaseti mago bɛ funteni labɔ – misali la, ka fanga yɔrɔ dɔ siri funteni-minɛn na – nɔrɔlan ka kan ka fɛn fila kɛ siɲɛ kelen: ka funteni bila a la ani ka a minɛ kosɛbɛ. Ni aw ye funteni-falen-falenw fara a kan (alumina, nitiridi boron, a ɲɔgɔnnaw) o bɛ funteni-taamacogo ɲɛ nka a bɛ se ka fɔ ko a bɛ dɔ bɔ nɔrɔli la tuma bɛɛ.
gɛlɛya ye ka funteni jiginni caya ka sɔrɔ ka nɔrɔli dɔgɔya i n' a fɔ a bɛ se ka kɛ cogo min na . Jaabi bɛ sɔrɔ fasa-paramɛtiri saba la: fɛnɲɛnɛma hakɛ, fɛnɲɛnɛma cogoya, ani doni kɛmɛsarada la.
Aokai PTFE ye funteni-minɛnw yiriwa PTFE kasɛti minnu bɛ kɛ ɛntɛrinɛti ni izini baarakɛcogo la. Nin barokun in bɛ a ɲɛfɔ cogo min na fɛnɲɛnamafagalanw hakɛ, u cogoya ani u doni bɛ nɔ bila jago la, ani cogo min na u bɛ se ka balansi ɲuman sɔrɔ.
Particule Size – Jagokɛyɔrɔ finman-kɔrɔlen
Fɛnɲɛnɛmaw hakɛ bɛ a ɲɛminɛ fasafɛnw bɛ funteni-minɛnw kɛ cogo min na ani nɔrɔlan bɛ sirili yɔrɔ ɲigi cogo min na.
1. Fɛnɲɛnamafagalanw (nano ka se submicron ma) .
Funteni nɔfɛko : Yɔrɔ min ka bon, o bɛ na ni fɛnɲɛnamafagalanw ni fɛnɲɛnɛmaw ka ɲɔgɔn sɔrɔyɔrɔw ye ka caya, nka a bɛ kɛ sababu ye fana ka funteni kunbɛnni caman sɔrɔ yɔrɔw ni ɲɔgɔn cɛ (fonon jɛnsɛnni). Aglomeration jugumanba bɛ dan sigi conductivité (taamacogo) ɲɛtaa la.
Nɔrɔli nɔ: Fɛnmugu finmanw bɛ resin ni tackifiers hakɛ caman minɛ, o bɛ nɔrɔli gɛlɛya. Tack fɔlɔ bɛ jigin kosɛbɛ. Jibɔ bɛ dɔgɔya, o bɛ dɔ bɔ jisigi la PTFE substratw kan minnu fanga ka dɔgɔn → u ɲɛkisɛ fanga ka dɔgɔn.
Kiiritigɛ: A man teli ka kɛ a kelen na. Filɛri minnu ka fin kosɛbɛ, olu bɛ gain marginal thermal di nka u bɛ adhesion tiɲɛ.
2. Fɛnɲɛnamafagalanw (mikɔrɔn ka se mikron tan ma) .
Funteni nɔ: A bɛ ɲɔgɔn sɔrɔ yɔrɔ minnu na, olu ka dɔgɔn nka u kelen-kelen bɛɛ ka funteni jiginni siraw ka jan. Ni u bɛ ɲɔgɔn dalajɛ kosɛbɛ nɔrɔlan janya sira fɛ, u bɛ tɛmɛsira-yɔrɔ-ko ɲuman di.
Nɔrɔli nɔ: Yɔrɔ min ka dɔgɔn, o bɛ resin dɔɔni minɛ, o bɛ nɔrɔli nɔgɔya mara. Nka ni fɛnɲɛnamafagalanw ka bon i n’a fɔ nɔrɔlen walima u ka bon ka tɛmɛ nɔrɔlen kan (a ka c’a la, u bɛ se ka kɛ 25-100 μm ye), u bɛ kaseti sanfɛla gɛlɛya, ka siriyɔrɔ nafama dɔgɔya, ka degun sɔrɔyɔrɔw dilan.
Kiiritigɛ: A bɛ kɛ i n’a fɔ kolosinsinnan fɔlɔ min bɛ taa ni a ye, nka a bonya ka kan ka kɛ nɔrɔmugu janya jukɔrɔ.
3. A furakɛcogo – bimodal blending
Aw bɛ fɛnɲɛnamafagalan gɛlɛnw ni fɛnɲɛnamafagalan finmanw ɲagami ɲɔgɔn na hakɛ kɛrɛnkɛrɛnnenw na. Suman finmanw bɛ yɔrɔ lakolonw fa fɛnɲɛnamafagalan gɛlɛnw ni ɲɔgɔn cɛ, ka se ka pake gɛrɛgɛrɛ sɔrɔ. Ni fasa bɛɛ lajɛlen doni kelen ye, bimodal grading bɛ dɔ fara particules contact points kan (conductivity ɲuman) walima, cogo wɛrɛ la, a bɛ se conductivity laɲinilen ma ni total filler dɔgɔyali ye , ka resin fasa to senna ka caya walasa ka nɔrɔli mara.
Aokai PTFE ka ladilikan : Ni nɔrɔlen don min janya ye 50 μm ye, aw bɛ fɛnɲɛnamafagalan gɛlɛnw kɛ minnu janya ye 20-30 μm ye, ka u ɲagami ɲɔgɔn na ni fɛnɲɛnamafagalan finmanw ye minnu janya ye 1-5 μm ye. O bimodali fɛɛrɛ in ye nafaw balansi kun ye.
Particle Morphology – Siginidenw cogoya nafa ka bon kosɛbɛ
Fasa minnu tɛ sɛrɛkili ye, olu bɛ bɛn ɲɔgɔn ma finidonni ni u jalen waati, o bɛ nɔ bila through-plane (Z-direction) funteni taabolo ni nɔrɔli la.
1. Fasa minnu bɛ kɛ sɛrɛkili ye walima minnu bɛ kɛ sɛrɛkili ye (misali la, alumini sɛrɛkili) .
Sumaya nɔ min bɛ sɔrɔ: Isotrope. Fɛnɲɛnɛmaw bɛ ɲɔgɔn dalajɛ nɔgɔya la u bonya sira fɛ, o ka ɲi funteni bɔli la awiyɔn kɔnɔ.
Nɔrɔli nɔ: Yɔrɔ nɔgɔlenw tɛ resin bɔli bali. A bɛ nɛnɛ-jibɔ ni dugukolo sanfɛla jibɔ lakana. Siginiden bɛɛ cɛma doni kelen na, sɛrɛkiliw bɛ nɔrɔli ɲuman mara – kɛrɛnkɛrɛnnenya la tack fɔlɔ.
Nafa min bɛ balansi la: Bɛnkan bɛɛ lajɛlen ka fisa. A bɛ Z-axis thermal gain caya ni adhesion bɔnɛ fitinin ye.
Sumaya nɔ : A fan hakɛ caman bɛ se ka kɛ sababu ye ka fɛnw tacogo ɲuman di awiyɔn kɔnɔ, nka flakɛw bɛ bɛn ɲɔgɔn ma ni substrat ye, o bɛ ɲɛtaa dɔɔnin di awiyɔn kɔnɔ – o man ɲi PTFE kasɛtiw ma minnu mago bɛ funteni jiginni jɔlen na.
Adhesion effect: Flakes bɛ kɛ i n’a fɔ partition films, ka plastic flow bali ani ka tack fɔlɔ tigɛ kosɛbɛ. Dawolo nɛrɛmuguma bɛ kɛ sababu ye ka degun caman sɔrɔ, o bɛ dɔ bɔ ɲɛgɛnw fanga la.
Balance dɛsɛ : A tɛ bɛn Z-direction thermal needs ma, o bɛ nɔrɔli danma tiɲɛ kosɛbɛ. A tɛ fɔ ka kɛ fasa kunba ye.
3. Fasa minnu bɛ kɛ ni fiɲɛ ye walima minnu tɛ kɛ cogo la
Sumaya nɔ: Aspect ratio ka bon, o bɛ se ka rezo conducteurs jɔ doni dɔgɔyalen na.
Nɔrɔli nɔ: Aw bɛ dɔ fara nɔrɔli sɔgɔli kan kosɛbɛ, ka PSA gɛlɛya ni masinw ka ɲɔgɔn sirili ye, ani ka nɔrɔli tiɲɛ. Dawolo nɛrɛmuguma bɛ adhesive-PTFE interface tiɲɛ.
Kiiritigɛ: A man teli ka kɛ fasa kunba ye; farali misɛnnin dɔrɔn de bɛ kɛ i n’a fɔ bɔrɔ dɛmɛnan.
Filɛri doni – Percolation Sweet Spot sɔrɔli
Ni fasa doni bɛ bonya, funteni-taama bɛ wuli dɔɔni dɔɔni a daminɛ na, o kɔfɛ a bɛ pan kosɛbɛ percolation threshold , o kɔfɛ plateaus. Nka, nɔrɔli bɛ dɔgɔya ka taa a fɛ.
1. A doni ka dɔgɔn (<30 vol%) .
Filɛriw ye gunw ye minnu bɛ u dan na, minnu bɛ sɔrɔ resin matirili kɔnɔ min bɛ taa ɲɛ. Funteni-sɔgɔsɔgɔninjɛ bɛ ɲɛ kosɛbɛ. Nɔrɔli bɛ to ka surunya PSA saniyalen na. Yɔrɔ lakananen don tack marali kama, nka thermal gain tɛ jate.
2. Doni min bɛ kɛ cɛmancɛ la ka se doni caman ma (30-60 vol%) – finɛtiri kɔrɔlen
Fɛnɲɛnɛmaw bɛ daminɛ ka maga ani ka kɛ siraw ye minnu bɛ taa ni fɛnw ye. Funteni-sɔgɔsɔgɔninjɛ bɛ wuli kosɛbɛ. O waati kelen na, resin matirili min bɛ taa ɲɛ, o bɛ kɛ fɛn ye min bɛ tigɛtigɛ. Adhesive bɛ wuli ka kɛ brittle ye; fɔlɔ tack ni peel fanga bɛ jigin kosɛbɛ.
Nin ye optimisation zone ye. Laɲini ye ka baara kɛ percolation threshold duguma dakun na – a ka bon fo ka se ka thermal specs dafa, ka dɔgɔ fo ka se ka resin fasa basigilen mara walasa ka nɔrɔli sɔn.
3. Doni min ka bon kosɛbɛ (>60 vol%) .
Dense particules packing bɛ sumaya sɔrɔli sumaya ka taa a fɛ (plateau). Resin tɛ se ka yɔrɔ bɛɛ fa; voids (yɔrɔ lankolonw) bɛ sɔrɔ. Nɛgɛ bɛ kɛ jalen ye, a bɛ kari, wa a bɛ ɲini ka kɛ a tɛ nɔrɔ. Kasɛti bɛ kɛ filimu sumalen ye min bɛ se ka tiɲɛ. Nafolo balansi bɛ tunun pewu.
Kɔlɔsili kɛrɛnkɛrɛnnen PTFE kaseti kan (silikɔni PSA): Silikoni ka jɛɲɔgɔnya fanga ka dɔgɔn ani a fasacogo ka dɔgɔn ka tɛmɛ akiriliki kan. A bɛ muɲu ka dɔgɔn fasa doni maksimali la. Ni aw falen don kojugu, o bɛ kɛ sababu ye ka nɔrɔlenw mugumugu.
Aokai PTFE empirical data : Ni alumini sɛrɛkili bɛ silikɔni PSA kɔnɔ, percolation threshold bɛ se 35-45 vol% ma. Balance optimal bɛ sɔrɔ 40-45 vol% lamini na ni bimodal distribution ye. Ni 55 vol% sanfɛ, nɔrɔli bɛ kɛ fɛn ye min tɛ sɔn ka kɛ a kɛcogo fanba la.
Kuma surun – Balancogo min bɛ kɛ ni saba ye kelen ye
Walasa ka balansi sabatilen sɔrɔ funteni jiginni ni nɔrɔli la PTFE nɔrɔli kasɛtiw kɔnɔ minnu funteni ka bon:
Aw bɛ baara kɛ ni fɛnmugu gɛlɛnw ye minnu bɛ kɛ sɛrɛkiliw ye (20-30 μm) i n’a fɔ kolosinsinnan fɔlɔ min bɛ se ka fɛnw ta – u bɛ fɛnw di minnu bɛ se ka fɛnw ta ka tɛmɛ pankurun fɛ ni nɔrɔli bɔnɛ fitinin ye.
Aw bɛ fɛnɲɛnamafagalan finmanw (1-5 μm) fara a kan walasa ka tilali fila kɛ – a bɛ yɔrɔ lakolonw fa, ka fasa bɛɛ lajɛlen mago ɲɛ, ka resin matirili mara.
Aw bɛ fasa doni bɛɛ lajɛlen mara percolation threshold duguma-cɛmancɛ la (40-45 vol% lamini aluminiyɔmu sɛrɛkili la silikɔni PSA kɔnɔ).
Aw bɛ dan sigi fasa flakɛlenw walima fɛnɲɛnamafagalanw na fo ka se <5 wt% ma ni aw mago bɛ a la hali dɔɔnin – u bɛ tiɲɛni kɛ tack la ani u bɛ nafa caman di awiyɔn kɔnɔ.
O kɔlɔlɔ: PSA kaseti min bɛ funteni minɛ, o bɛ nɔrɔ tiɲɛ na ani ka mɛn.
Aokai PTFE bɛ PTFE kasɛtiw dilan minnu bɛ funteni minɛ ni nin bimodal spherical filler fɛɛrɛ in ye. An bɛ se ka funteni minɛcogo ni nɔrɔli hakɛw labɛn ka kɛɲɛ ni aw ka baarakɛcogo ye.
Takeaway laban
Ka funteni minɛcogo ɲɛ PTFE nɔrɔlanw na, o bɛ nɔrɔli kɛlɛ tuma bɛɛ. bɛnkan ɲuman bɛ bɔ fɛnɲɛnamafagalanw na + hakɛ tilatilali bimodali + doni tali tɛmɛnen dɔrɔn percolation . Aw bɛ aw yɛrɛ tanga flakɛw ni fiɲɛw ma fo ni aw ka furakɛli mago bɛ kɛrɛnkɛrɛnnenya la awiyɔn kɔnɔ fɛnɲɛnamafagalanw na ani ni a bɛ se ka sɔgɔsɔgɔninjɛ dɔgɔman muɲu.
Walasa ka jɛɲɔgɔnya kɛcogo ɲuman sɔrɔ ni funteni bɔli ye, PTFE kase min bɛ funteni lase, o ye fura ye min sɛgɛsɛgɛra. Aw bɛ taa Aokai PTFE fɛ walasa ka furaw sɔrɔ minnu bɛ bɛn aw ka funteni ni aw ka ɲɛgɛnw ma.
Ka tugu baarakɛcogo ɲuman ni danbe la, an bɛ furaw di minnu bɛ kɛ ka kɛɲɛ ni mɔgɔw sago ye yɔrɔ kelen na ani feereli kɔfɛ baara minnu bɛ kɛ ni hakili ye.
