Te hangarau hanga karāhe me ngā āhuatanga tiaki mai i ngā kino miihini
He mea tino mōhiotia te karāhe i roto i te ao hou: e whakamahia ana i roto i ngā matapihi kāinga, i ngā whare teitei, i ngā mata waea atamai, i ngā waka, tae atu ki ngā taputapu whatu. Engari i muri i tōna āhua mārama me te "pakaru", ka taea te hanga i te karāhe kia kaha ake, kia haumaru ake hoki. Ko ngā whanaketanga o te hangarau hanga karāhe inaianei ehara i te mea ko te ataahua me te mārama anake, engari ko te tiaki hoki i ngā kino miihini pēnei i ngā pānga, ngā karawarawa, te pēhanga, me ngā huringa ohorere o te kawenga. Mā te whakakotahitanga o te hangarau hanganga, ngā tukanga wera, ngā maimoatanga matū, me ngā hoahoa hanganga paparanga, ka taea e te karāhe te whakatutuki i te ātete e tata ana ki ngā whakaritenga o ngā ahumahi morearea nui.
1. He aha te take e ngawari ai te karāhe ki te pakaru ā-ringa?
Ko te karāhe he rauemi kore-āhua (kāore he hanganga tioata ōrite). Mā tēnei āhuatanga ka mārama ake te tirohanga, engari ka pāngia hoki te karāhe e ngā hapa iti i runga i tōna mata. Ka taea e ngā karawarawa iti, ngā pūwero iti, ngā kapiti iti rānei te tīmata i ngā pakaru ina pāngia te karāhe e te ahotea ā-pūkaha. Nā te mea he iti ake te pakari o te karāhe ki te pakaru i ngā mea whakarewa, ka tere te horapa o ngā kapiti, ka pakaru ohorere.
Ko te kino ā-pūkaha ki te karāhe ka wehea kia maha ngā momo:
– Ngā karawarawa (whakakā/rarau): i te nuinga o te wā ka puta mai i ngā matūriki mārō pēnei i te onepu, te puehu kuata, te pā rānei ki ngā mea whakarewa.
– Te whati pānga: hei tauira, te pāngia e te kōhatu i a ia e neke ana te waka, te taka rānei o te taputapu.
– Te pakaru nā te piko, te pēhi rānei i ngā kawenga: ka puta pinepine i roto i ngā panera karāhe nui, i ngā karāhe hanganga rānei.
– Te rahunga nā te ahotea me te pāmahana toenga: ka taea e ngā huringa tere o te pāmahana te whakararuraru i ngā āhuatanga ahotea i roto i te karāhe.
Hei whakakore i tēnei, kua whakawhanakehia e ngā hangarau hou he karāhe ka taea te whakahaere i te ahotea, te aukati i te horapa o ngā kapiti, me te tiaki i ngā mata mai i te pakū.
2. Ngā wāhanga taketake o te hanga karāhe: ngā turanga kounga ā-mīhini
I mua i te kōrero mō ngā āhuatanga tiaki, ko te kounga o te karāhe ka whakatauhia nuitia e te tukanga hanga tuatahi. I te nuinga o te wā, ka hangaia te karāhe silicate mai i te ranunga o te silica (SiO₂), te pungarehu houra (Na₂CO₃), me te kōhatu kōhatu (CaCO₃), me ētahi atu tāpiringa hei whakatika i te matotoru, te tae, ngā āhuatanga hangarau rānei. Ka rewa te ranunga i ngā pāmahana teitei (tata ki te 1.400–1.600°C), kātahi ka hangaia hei rau, hei pounamu, hei āhua rānei.
Mō te karāhe pepa hoahoanga, ko te tikanga tino noa ko te karāhe pōrewarewa, ka ringihia te karāhe rewa ki runga i te mata tine rewa, ka puta he pepa papatahi, maeneene. He mea nui tēnei mata maeneene nā te mea ka whakaitihia ngā hapa o te mata, ka whakanui ake i te ātete ki te pakaru. Muri iho, ka whakamahanahia te karāhe (ka whakahaeretia te whakamatao) hei whakaiti i ngā ahotea toenga o roto.
Heoi anō, kāore anō kia tino kaha te karāhe pōrewarewa paerewa mō ngā mahi o ēnei rā. Koinei te wāhi e whai hua ai te hangarau whakapakari.
3. Whakapakari wera: karāhe whakamahana me te karāhe whakapakari wera
Ko tētahi o ngā tikanga e whakamahia whānuitia ana hei whakanui ake i te kaha ā-pūkaha ko te whakamahana, arā, te whakapakari wera. Ko te tukanga he whakamahana i te karāhe kia tata ki tōna pāmahana ngohengohe, kātahi ka whakamatao tere mā te whakamahi i te hau. Mā tēnei whakamatao tere ka totoka te mata o te karāhe i mua i te taha o roto, ka hua ake:
– Te ahotea pēhanga i runga i te mata
– Te ahotea kume i roto i te uho
He pai te ahotea pēhanga i runga i te mata nā te mea ko ngā kapiti te nuinga o te wā ka puta mai i te mata. Hei whakanui i te kapiti, me whakamahi te ahotea kume; heoi, nā te mea kei raro te mata i te pēhanga, he uaua ake te whakatuwhera i ngā kapiti. Nō reira, he maha ngā wā ka nui ake te kaha piko o te karāhe kua whakapakeketia i te karāhe noa, me te ātete pānga nui ake.
Kei reira anō te karāhe whakakaha-wera, he rite tonu te tukanga engari he puhoi ake te whakamatao i te karāhe whakakaha. He kaha ake tēnei momo karāhe i te karāhe whakakaha, engari kāore i te rite te kaha ki te karāhe whakakaha. Ko tōna painga he iti ake te whakapōturi whatu i te karāhe whakakaha, he mea pai mō ngā mata o mua o te whare e hiahia ana ki te kounga tirohanga teitei.
Mai i te tirohanga haumaru, he rerekē te āhua o te karāhe kua whakapakeketia: ka pakaru ki ngā wahi iti, kāore i te koi rawa atu i ngā maramara nui. Heoi, mō ngā tono e hiahia ana kia noho pūmau te karāhe i muri i te pakaru, ko te hangarau whakapiri te mea e whiriwhiria ana.
4. Karāhe whakakikoruatia: ātete ki te pakaru, ā, ka whakanui ake i te ātete pānga
Ka hangaia te karāhe whakakikorua mā te hono i ngā rau karāhe e rua, neke atu rānei, mā te whakamahi i tētahi paparanga pūmua (interlayer) pērā i te PVB (polyvinyl butyral), te EVA, te ionoplast rānei (hei tauira, te SGP). Ka mahi tēnei paparanga hei "piripiri" ā, ka mimiti hoki i te kaha pānga.
Ko ngā painga matua o te karāhe whakakikoruatia i roto i te tiaki ā-ringa ko:
– Ka ārai i te marara o ngā maramara, ka whakapiki ake i te haumaru.
– Ka whakanui ake i te ātete ki te pānga, nā te mea ka mimitihia te pūngao e te paparanga o roto.
– Ka ārai i te urunga, nō reira ka whakamahia pinepinetia i roto i te karāhe haumaru, te karāhe ārai-kino, tae atu ki te karāhe ātete-matā (me ngā whirihoranga paparanga matatini ake).
I ngā hoahoa hou, he maha ngā wā ka honoa te karāhe whakakikoruatia ki te karāhe whakamakuku: hei tauira, e rua ngā rau karāhe whakamakuku kua whakakikoruatia. Mā tēnei whakakotahitanga ka hangaia he panera e kaha ana, e haumaru ana hoki mēnā ka pakaru.
5. Whakapakari matū: karāhe kaha ake, kāore he hapa nui.
Mō ngā karāhe angiangi, pērā i ngā mata waea pūkoro, ngā mātiti, me ngā taputapu whatu, kāore i te tino pai te whakapakari wera i ētahi wā nā te mea kei te hē te āhua, kei te herea rānei te āhua. Ko te otinga ko te whakapakari matū mā te whakawhiti katote.
I tēnei tikanga, ka rumakina te karāhe (ko te tikanga he aluminosilicate) ki roto i te tote rewa, pērā i te pāhare pākawa waro (KNO₃), i tētahi pāmahana motuhake. Ka whakawhitihia ngā iona konutai (Na⁺) ki runga i te mata karāhe mō ngā iona pāhare pākawa waro nui ake (K⁺). Nā te mea he iti te wāhi i roto i te hanganga karāhe, ko te whakaurunga o ngā iona nui ake ka puta he ahotea pēhi teitei ki runga i te mata, he rite ki te pānga o te whakamahana engari he tino pai te whakahaere, ā, he pai mō te karāhe angiangi.
Ngā painga o te whakapakari matū:
– Kua tino piki ake te ātete ki te pakaru mai i ngā karawarawa moroiti.
– He maeneene tonu, he mārama tonu te mata.
– He pai mō ngā āhua uaua me ngā matotoru angiangi.
Ko tēnei whakapakari matū te tūāpapa o te maha o ngā pare mata hou.
6. Hangarau paninga: te tiaki i ngā karawarawa me te pakū
Kāore i te wā katoa ka pakaru te mata i te kino ā-pūkaha; i ētahi wā ka heke te kounga o te mata nā te rakuraku o te mata. Hei whakatutuki i tēnei, kua whakawhanakehia ngā momo paninga hei whakanui ake i te mārō o te mata, hei whakaiti hoki i te waku.
Ētahi huarahi noa:
– He paninga mārō kei runga i te silica, i te waikura whakarewa rānei, ka taea te whakanui ake i te ātete ki te pakū.
– He paninga ārai-rakuraku waro-kore-waro (he sol-gel ranu) e whakarato ana i tētahi paparanga mārō engari mārama.
– He paninga ārai-whakaata me te ārai-paru kua whakakotahihia hei pupuri i te mahi whatu me te whakaiti i te mōrearea o ngā karawarawa nā te horoinga auau.
He rerekē ngā tikanga whakatakoto paninga, pērā i te paninga ruku (PVD), CVD, te paninga sol-gel rānei, i runga i ngā whakaritenga matotoru, te kaha piri, me ngā utu whakaputa.
7. Te hangarau hanganga: he karāhe pakari ake i roto
Haunga te maimoatanga mata, ka taea te whakapai ake i te hanganga karāhe hei whakapai ake i te kaha ā-ringa. Hei tauira, he pai te whakakotahitanga o te kaha me te pumau matū o te karāhe aluminosilicate. Mā te tāpiri i ētahi waikura ka taea te whakanui ake i te pakari o te whatunga karāhe, te whakaiti i te āhua o te pakaru, te whakapai ake rānei i tana urupare ki ngā tukanga whakawhiti katote.
I runga i te tauine ahumahi, he maha ngā taupatupatu e pā ana ki te hangarau tito: ko te karāhe he tino mārō rawa, he uaua ake te tukatuka, he nui ake te pāmahana e hiahiatia ana, he nui ake rānei te utu. Nō reira, ko te tikanga, ka whakatauritehia e ngā kaihanga te mahi miihini me ngā kaha hanga papatipu.
8. Te hoahoa me te mana kounga: te whakatau i ngā āhuatanga mō te ātete kino
Ehara i te mea ko ngā rauemi anake te kaupapa o te hangarau tiaki miihini, engari ko te hoahoa me te whakahaere whakaputa anō hoki:
– Te whakahaere i ngā hapa o te mata: he mea nui ngā tukanga tapahi, huri me te whakakanapa i ngā taha nā te mea ka tīmata ngā pakaru i ngā taha o te karāhe.
– Te kounga o te taha (te whakaotinga o te taha): mā ngā taha kua orohia, kua kutikutihia ka kaha ake te āhua o te panera karaihe.
– Whakamātautau pānga me te whakamātautau pakaru: kia tino pakaru te karāhe kua whakapakeketia kia rite ki ngā paerewa haumaru.
– Whakamātautau piri me te ātete ki te koroheketanga o te paparanga raima: kia mōhio kei te ngāwari te kōwhai, te wehewehe rānei i waenga i ngā paparanga.
I roto i ngā whare me ngā waka, he mahi anō tā te hoahoa whakairinga: mā te whakamahi i ngā gaskets tika, ngā hiri me ngā pūnaha anga ka ārai i te nui o te ahotea e arahi atu ai ki te ngatata.
9. Ngā tono: mai i te hoahoanga ki ngā taputapu ringaringa
Kei te piki haere te whakamahinga o te karāhe tiaki ā-ringa:
– Whare: te mata o mua, te tuanui, te matapihi tuanui, te taiapa karāhe, me te papa karāhe kua whakamaroketia/kua whakakikoruatia hei haumaru.
– Mō ngā motuka: he mea whakakikorua ngā matapihi o mua (kia kore ai e pakaru), ko ngā matapihi taha ia he mea whakamahana.
– Hikohiko: ka whakapakarihia te karāhe angiangi mā te matū, ka pania ki te paninga ātete-rakuraku.
– Ahumahi me te haumarutanga: ka whakamahia e te karaihe ātete-pahū, ātete-uru rānei, ngā whirihoranga paparanga maha me ngā paparanga-waenga mahi-teitei.
Whakamutunga
Ko te hangarau hanga karāhe me te tiaki i ngā kino ā-mīhini he hua o te whakaurunga o ngā momo kaupapa maha: te matū rauemi, te hangarau tukanga, te hoahoa hanganga, me te whakahaere kounga. Ko te whakapakari wera (te whakamahana/te whakapakari wera) ka whakanui ake i te ātete ki te pānga me ngā kawenga, ko te whakapiringa ka whakarite i te haumaru me te ārai i ngā maramara mai i te marara, ko te whakapakari matū ka whakapakari tika i te mata karāhe angiangi, ko ngā paninga me te hangarau hanganga ka whakanui ake i te ātete ki ngā karawarawa me ngā kapiti moroiti. Mā te auaha tonu, ehara te karāhe i te mea mārama noa iho, engari he wāhanga hanganga me te tiaki pono ake mō ngā hiahia hou.
