I-Wollastonite powder isibe yisithako esibalulekile ku-ceramics yokushisa kagesi, ihlinzeka ngezithuthukisi zokusebenza ezibalulekile zezingxenye ezinamandla aphezulu njenge-transformers, ama-circuit breakers, kanye nama-insulator bushings. Inhlanganisela yayo eyingqayizivele yobumsulwa obuphezulu, ukulahlekelwa kwe-dielectric okuphansi, kanye nokuzinza kokushisa kwenza kube kuhle kakhulu ekusetshenzisweni okudinga ukushisa okuthembekile kagesi kanye nokushabalaliswa kokushisa.
Amandla kagesi – insimu kagesi ephezulu kakhulu into engayimela ngaphandle kokuphuka ithuthukiswa kakhulu kuma-ceramic aqukethe i-wollastonite powder. Njengoba amazinga okuhlanzeka evame ukwedlula i-95% CaSiO3 kanye nokugcwala okuphansi kokungcola okuqhubayo (njengensimbi ne-sodium), i-wollastonite isiza ukugcina ukumelana okuphezulu kokushisa ngisho noma ama-voltage edlula i-10kV. Uma ihlakazeka ngokulinganayo kuma-matrices e-ceramic (ngokuvamile ihlanganiswa ne-alumina noma i-magnesia), izinhlayiya zayo ze-acicular zakha indlela egobile yamandla kagesi, ivimbela ukugoba futhi iqinisekise ukusebenza okuzinzile ezindaweni ezinama-voltage aphezulu. Lokhu kwenza ama-ceramic athuthukisiwe yi-wollastonite afanele ukusetshenziswa okubalulekile lapho ukwehluleka kokushisa kungaholela ekulimaleni kwemishini noma ezingozini zokuphepha.
Ukunciphisa ukugoba kungenye inzuzo ebalulekile yempuphu ye-wollastonite kuma-ceramic kagesi. Ngesikhathi sokusila, ubukhulu bayo obuncane bezinhlayiya (ama-micron angu-5-20) bugcwalisa izikhala phakathi kwezinhlayiya ezinkulu ze-ceramic, bukhuthaza ukuqina nokunciphisa izikhala. Lesi sakhiwo esincane esiminyene asigcini nje ngokuthuthukisa amandla omshini (ukunciphisa ukuphuka ngesikhathi sokuphathwa nokusebenza) kodwa futhi sivimbela umswakama kanye nokungena kwegesi - izinto ezingalimaza izakhiwo zokuvikela ngokuhamba kwesikhathi. Kuma-insulator angaphandle abhekene nemvula, umswakama, kanye nokungcola, lokhu kugoba okuphansi kubalulekile ekugcineni ukusebenza kwe-dielectric isikhathi eside.
Ukushisa kuyathuthuka kuma-ceramic aqukethe i-wollastonite, okubhekana nenselele ebalulekile ezingxenyeni ze-high voltage ezikhiqiza ukushisa okukhulu ngesikhathi sokusebenza. Njengoba i-thermal conductivity icishe ibe yi-3 W/m·K (ephakeme kunezigcwalisi eziningi ze-ceramic zendabuko), i-wollastonite ithuthukisa ukudluliselwa kokushisa kude nezinto eziqhubayo, isiza ukugcina amazinga okushisa asebenzayo azinzile. Leli khono lokuphatha ukushisa landisa isikhathi sokuphila kwengxenye ngokuvimbela ukonakala kokushisa okubangelwa ukushisa, okubaluleke kakhulu kuma-transformer kanye nemishini yokusabalalisa amandla lapho ukushisa ngokweqile kungabangela ukwehluleka okukhulu.
Ukuqina kwezinga lokushisa eliphezulu kuqinisekisa ukuthi izinto zobumba ezithuthukisiwe ze-wollastonite zisebenza ngokwethembeka ngaphansi kokujikeleza kokushisa. Le minerali igcina isakhiwo sayo kanye nezakhiwo zayo emazingeni okushisa afinyelela ku-1500°C, imelana namazinga okushisa aphezulu ahlangana nawo ngesikhathi sokukhiqiza (ukushiswa) kanye nokusebenza. Lokhu kuzinza kuvimbela izinguquko zesigaba noma ukungalingani kokukhula kokushisa okungadala ukucindezeleka kwangaphakathi noma imifantu, okuqinisekisa ubuqotho bobukhulu kanye nokusebenza okuhambisanayo phakathi nokushintsha kwezinga lokushisa.
Izinzuzo zokucubungula zenza kube lula ukufaka i-wollastonite powder ekwakhiweni kwe-ceramic. Ithuthukisa amandla aluhlaza (amandla e-ceramics angashiswanga), inciphisa ukuphuka ngesikhathi sokubumba nokuphatha. Ukumuncwa kwayo okumanzi okuncane kwenza kube lula izinqubo zokomisa, kuyilapho ukuhambisana kwayo nezihlanganisi ze-ceramic ezivamile kuqinisekisa ukuxubana okufanayo kanye nokwakheka. Ngezimo eziyinkimbinkimbi ezifana nama-insulator disc noma amabhlogo wokugcina, izakhiwo zokugeleza kwe-wollastonite ngesikhathi sokubumba zisiza ukugcina ukunemba kobukhulu, kunciphisa izidingo zangemva kokucutshungulwa.
Ukulawulwa kwekhwalithi kubaluleke kakhulu kumpuphu we-wollastonite wezinga likagesi. Abaphakeli bayibeka ekuhlolweni okuqinile kwamandla e-dielectric, ukusatshalaliswa kosayizi wezinhlayiya, kanye namazinga okungcola, ukuqinisekisa ukuhambisana nezindinganiso zemboni njengemininingwane ye-IEC (International Electrotechnical Commission). Ukwelashwa kwendawo ngama-coupling agents kungasetshenziswa ukuthuthukisa ukubopha nge-ceramic matrices, ukuthuthukisa izakhiwo zemishini kanye nekagesi.
Isikhathi sokuthunyelwe: Agasti-13-2025
