{"id":709,"date":"2026-09-26T08:15:40","date_gmt":"2026-09-26T00:15:40","guid":{"rendered":"https:\/\/siliconcarbide.net\/?p=709"},"modified":"2026-09-26T08:15:40","modified_gmt":"2026-09-26T00:15:40","slug":"pse-tubi-prej-karbidi-silikoni-zgjat-me-shume-se-metali-ne-nje-furre-te-nxehte","status":"publish","type":"post","link":"https:\/\/siliconcarbide.net\/sq\/why-silicon-carbide-tube-outlast-metal-in-a-hot-furnace\/","title":{"rendered":"Pse tubi prej karbidi silikoni zgjat m\u00eb shum\u00eb se metali n\u00eb nj\u00eb furr\u00eb t\u00eb nxeht\u00eb"},"content":{"rendered":"<div>\n<div>\n<div>\n<div>\n<h1 dir=\"auto\">Pse tubi prej karbidi silikoni zgjat m\u00eb shum\u00eb se metali n\u00eb nj\u00eb furr\u00eb t\u00eb nxeht\u00eb<\/h1>\n<p dir=\"auto\">N\u00ebse nj\u00eb tub furre d\u00ebshton, rrall\u00eb ndodh n\u00eb nj\u00eb m\u00ebnyr\u00eb miq\u00ebsore p\u00ebr laboratorin. Ai varet, mbulon me shkall\u00eb, kriset n\u00eb nj\u00eb mbajt\u00ebse, ose ndalon t\u00eb transferoj\u00eb nxeht\u00ebsin\u00eb ashtu si\u00e7 b\u00ebnte n\u00eb vitin e par\u00eb. Ky \u00ebsht\u00eb problemi p\u00ebr t\u00eb cilin jan\u00eb nd\u00ebrtuar tubat prej karbidi silikoni. Jo \u201cceramik\u00eb n\u00eb vend t\u00eb \u00e7elikut.\u201d Nj\u00eb tub q\u00eb mund t\u00eb q\u00ebndroj\u00eb m\u00eb i nxeht\u00eb, t\u00eb \u00e7liroj\u00eb m\u00eb shum\u00eb nxeht\u00ebsi dhe t\u00eb duket ende si nj\u00eb tub, pasi versionet prej aliazhesh kan\u00eb filluar t\u00eb deformohen n\u00eb form\u00eb bananeje.<\/p>\n<p dir=\"auto\">Tubat metalike rrezatuese jan\u00eb t\u00eb lehta p\u00ebr t'u p\u00eblqyer n\u00eb let\u00ebr. Mund t'i saldhoni. Mund t'i godisni. Porosia e blerjes duket e lir\u00eb. Pastaj temperatura e murit rritet dhe fillon rr\u00ebshqitja. Shkalla e oksidit rritet, shk\u00ebputet n\u00eb copa dhe vjedh nxeht\u00ebsin\u00eb. P\u00ebr t\u00eb mbajtur jet\u00ebn e pranueshme, shum\u00eb tuba prej aliazhesh funksionojn\u00eb me fluks t\u00eb moderuar nxeht\u00ebsie \u2014 shpesh n\u00eb intervalin 25\u201330 kW\/m\u00b2. Duhet m\u00eb shum\u00eb prodhim? Shtoni tuba, ose i mbivendosni zjarrit ato q\u00eb keni dhe i z\u00ebvend\u00ebsoni m\u00eb her\u00ebt.<\/p>\n<p dir=\"auto\">Karidi i silicit ndryshon kufirin. Materiali p\u00ebrcjell mir\u00eb nxeht\u00ebsin\u00eb dhe rrezaton mir\u00eb. Ai nuk formon nj\u00eb shtres\u00eb t\u00eb trash\u00eb q\u00eb del n\u00eb pet\u00eb. Me SiC t\u00eb silikonizuar (SiSiC), ne rregullisht projektojm\u00eb tuba rrezatues p\u00ebr rreth dyfishin e atij fluksi, af\u00ebrsisht 50 kW\/m\u00b2, pa zbritjen n\u00eb mes t\u00eb gjat\u00ebsis\u00eb q\u00eb shfaqet te aliazh\u00ebt e nikelit. Forca mbahet n\u00eb intervalin 1350\u20131380 \u00b0C. Pas k\u00ebsaj, silici i lir\u00eb n\u00eb SiSiC \u00ebsht\u00eb kufiri maksimal. Ne nuk e tejkalojm\u00eb k\u00ebt\u00eb kufi dhe shpresojm\u00eb.<\/p>\n<p dir=\"auto\">Jo \u00e7do tub SiC \u00ebsht\u00eb i nj\u00ebjti pjes\u00eb.<\/p>\n<p dir=\"auto\">SiSiC \u00ebsht\u00eb i dendur dhe hermetik. Djegia mbetet brenda. Gazi i procesit mbetet jasht\u00eb. Tuba t\u00eb gjata horizontale rrezatuese, tuba ftoh\u00ebse, disa sonda \u2014 ky \u00ebsht\u00eb pun\u00ebtori kryesor kur ju nevojitet nj\u00eb vul\u00eb dhe q\u00ebndrueshm\u00ebri.<\/p>\n<p dir=\"auto\">SiC i rikristalizuar \u00ebsht\u00eb i porosur, shum\u00eb i past\u00ebr dhe jasht\u00ebzakonisht i mir\u00eb n\u00eb p\u00ebrballimin e shokut termik. Sh\u00ebrbimi n\u00eb aj\u00ebr mund t\u00eb arrij\u00eb rreth 1600 \u00b0C. Mos e k\u00ebrkoni t\u00eb mbaj\u00eb presion. P\u00ebrdoreni aty ku flak\u00ebt dhe ciklet e nxeht\u00ebsis\u00eb e v\u00ebn\u00eb tubin n\u00eb prov\u00eb dhe hermetizmi nuk \u00ebsht\u00eb thelb\u00ebsor.<\/p>\n<p dir=\"auto\">SiC i sinteruar \u00ebsht\u00eb i dendur, me past\u00ebrti t\u00eb lart\u00eb, i pap\u00ebrshkuesh\u00ebm nga gazrat dhe zgjedhja e zakonshme p\u00ebr tubin mbrojt\u00ebs t\u00eb termokupl\u00ebs n\u00eb gaz korroziv ose g\u00ebrryes. Sensor\u00ebt v\u00ebrejn\u00eb ndryshimin m\u00eb shpejt sesa p\u00ebrmes alumina-s, sepse muri \u00ebsht\u00eb konduktiv. P\u00ebr termokuplat me platin, ne ende shpesh vendosim nj\u00eb veshje alumine brenda. SiC mund t\u00eb p\u00ebrcjell\u00eb elektrike mjaftuesh\u00ebm p\u00ebr t\u00eb d\u00ebmtuar nj\u00eb element t\u00eb holl\u00eb n\u00ebse e anashkaloni k\u00ebt\u00eb.<\/p>\n<p dir=\"auto\">D\u00ebshtimet q\u00eb ne me t\u00eb v\u00ebrtet\u00eb i shohim jan\u00eb t\u00eb m\u00ebrzitshme. Nj\u00eb fund i mbyllur u puth me dyshemen\u00eb. Nj\u00eb kap\u00ebse shtr\u00ebngoi murin. Nj\u00eb djeg\u00ebs u ndez jasht\u00eb qendr\u00ebs dhe la nj\u00eb vij\u00eb t\u00eb nxeht\u00eb n\u00eb nj\u00ebr\u00ebn an\u00eb. Tubi SiC nuk g\u00ebrvishtet dhe m\u00eb pas vazhdon t\u00eb funksionoj\u00eb. Ai \u00e7ip\u00ebsohet. Oksidimi \u00ebsht\u00eb i v\u00ebrtet\u00eb \u2014 silika rritet n\u00eb aj\u00ebr \u2014 por zakonisht \u00ebsht\u00eb i ngadalt\u00eb dhe mbrojt\u00ebs. Nj\u00eb mbajt\u00ebs i keq nuk \u00ebsht\u00eb.<\/p>\n<p dir=\"auto\">N\u00ebse po z\u00ebvend\u00ebsoni metalin me SiC, mos kopjoni t\u00eb nj\u00ebjt\u00ebn gjat\u00ebsi dhe trash\u00ebsi t\u00eb murit dhe vet\u00ebm ndryshoni emrin e materialit. Na tregoni temperatur\u00ebn, atmosfer\u00ebn, n\u00ebse \u00ebsht\u00eb horizontale apo vertikale, dhe n\u00ebse tubi duhet t\u00eb jet\u00eb hermetik ndaj gazit. At\u00ebher\u00eb klasa dhe trash\u00ebsia e murit kan\u00eb kuptim. Q\u00ebllimi i tubave prej karbidi silikoni \u00ebsht\u00eb i thjesht\u00eb: m\u00eb shum\u00eb nxeht\u00ebsi p\u00ebrmes murit, m\u00eb pak p\u00ebrkulje n\u00eb gjat\u00ebsi, m\u00eb pak ndalime t\u00eb papritura. Kjo ndodh vet\u00ebm n\u00ebse tubi p\u00ebrcaktohet si pjes\u00eb furre, jo si nj\u00eb tub i gatsh\u00ebm nga rafti.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div>&nbsp;<\/div>\n<\/div>\n<section><\/section>\n<div>&nbsp;<\/div>","protected":false},"excerpt":{"rendered":"<p>Why Silicon Carbide Tube Outlast Metal in a Hot Furnace If a furnace tube fails, it rarely fails in a lab-friendly way. It sags, scales, cracks at a hanger, or stops moving heat the way it did in year one. That is the problem silicon carbide tube are built for. Not \u201cceramic instead of steel.\u201d&hellip;&nbsp;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-709","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/comments?post=709"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/709\/revisions"}],"predecessor-version":[{"id":710,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/709\/revisions\/710"}],"wp:attachment":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/media?parent=709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/categories?post=709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/tags?post=709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}