{"id":184,"date":"2023-07-15T11:00:28","date_gmt":"2023-07-15T03:00:28","guid":{"rendered":"https:\/\/advance-ceramics.com\/?p=184"},"modified":"2023-07-15T11:58:55","modified_gmt":"2023-07-15T03:58:55","slug":"unele-proprietati-si-utilizari-ale-ceramicii-din-carbura-de-siliciu","status":"publish","type":"post","link":"https:\/\/advance-ceramics.com\/ro\/some-properties-and-uses-of-silicon-carbide-ceramics\/","title":{"rendered":"Unele propriet\u0103\u021bi \u0219i utiliz\u0103ri ale ceramicii din carbur\u0103 de siliciu"},"content":{"rendered":"

Ceramica din carbur\u0103 de siliciu este un material cu rezisten\u021b\u0103 ridicat\u0103, conductivitate termic\u0103 ridicat\u0103, rezisten\u021b\u0103 la coroziune acid\u0103 \u0219i alcalin\u0103, se poate adapta bine la mediul extern \u00een procesul de utilizare, industria este considerat\u0103 a fi cel mai bun material de schimb\u0103tor de c\u0103ldur\u0103 rezistent la coroziune. Materiale ceramice obi\u0219nuite \u00een 1200 ~ 1400 \u2103 atunci c\u00e2nd rezisten\u021ba va fi redus\u0103 \u00een mod semnificativ, \u0219i ceramic\u0103 carbur\u0103 de siliciu \u00een 1400 \u2103 atunci c\u00e2nd rezisten\u021ba la \u00eencovoiere este \u00eenc\u0103 men\u021binut\u0103 la un nivel ridicat de 500 ~ 600MPa, \u0219i temperatura sa de func\u021bionare de p\u00e2n\u0103 la 1600 ~ 1700 grade Celsius.<\/p>\n

Ceramica din carbur\u0103 de siliciu nu are doar o densitate sc\u0103zut\u0103 \u0219i o duritate foarte mare, fiind unul dintre cele mai dure materiale ceramice. Propriet\u0103\u021bile sale materiale pot r\u0103m\u00e2ne neschimbate la temperaturi de p\u00e2n\u0103 la 1400\u00b0C. Materialul are un modul ridicat (modulul lui Young). Modulul Young ridicat (> 400 GPa) asigur\u0103 stabilitatea dimensional\u0103 sub presiune ridicat\u0103. De asemenea, este toxicologic sigur \u0219i poate fi utilizat \u0219i \u00een industria alimentar\u0103. \u00cen plus, materialele SiC au
\nconductivitate termic\u0103 excelent\u0103, dilatare termic\u0103 redus\u0103 \u0219i sunt foarte rezistente la acizi \u0219i alcalii.<\/p>\n

Caracteristicile ceramicii SiC includ \u00een principal: reutilizabil\u0103, nu provoac\u0103 de\u0219euri de materiale, sus\u021bin\u00e2nd dezvoltarea durabil\u0103; rezisten\u021b\u0103 chimic\u0103 la coroziune, poate fi utilizat\u0103 \u00een instala\u021bii chimice foarte corozive etc., \u00een intervalul de temperatur\u0103 de -70 \u2103 p\u00e2n\u0103 la 260 \u2103 rezisten\u021b\u0103 la coroziune, oxidare \u0219i rezisten\u021b\u0103 la coroziune este foarte mare, durat\u0103 lung\u0103 de via\u021b\u0103, costuri de \u00eentre\u021binere mai mici \u0219i timp de func\u021bionare mai lung; rezisten\u021b\u0103 la temperaturi ridicate, 1800 \u2103 utilizare normal\u0103, \u0219i nu va fi utilizat \u00een industria alimentar\u0103. 1800 \u2103 utilizare normal\u0103, \u0219i nu va fi topit daune, stabilitate; conductivitate termic\u0103 ridicat\u0103, stabilitate la temperaturi foarte ridicate, performan\u021be structurale stabile. Conductivitatea sa termic\u0103 este a doua numai la ceramica oxid de beriliu \u00een ceramic\u0103.<\/p>\n

De ce mai multe companii chimice aleg s\u0103 utilizeze carbura de siliciu ca material de transfer termic, mai degrab\u0103 dec\u00e2t oxidul de beriliu? Motivul este foarte simplu - dup\u0103 cum \u0219tim cu to\u021bii, de\u0219i ceramica din oxid de beriliu nu este toxic\u0103, dar materia prim\u0103 BeO este o substan\u021b\u0103 toxic\u0103, \u00een procesul de fabricare \u0219i utilizare a prafului \u0219i vaporilor de BeO asupra s\u0103n\u0103t\u0103\u021bii umane va provoca daune grave toxicit\u0103\u021bii m\u0103surilor de protec\u021bie luate printr-o cre\u0219tere suplimentar\u0103 a costurilor, astfel \u00eenc\u00e2t pre\u021bul ini\u021bial al ceramicii BeO devine mai scump. Compara\u021bie cuprinz\u0103toare, rentabilitatea carburii de siliciu pare s\u0103 fie mai rentabil\u0103, nu numai performan\u021be bune, materia prim\u0103 este, de asemenea, inofensiv\u0103 pentru s\u0103n\u0103tatea uman\u0103 \u0219i mai ieftin\u0103, mai potrivit\u0103 pentru opera\u021biunile de produc\u021bie de volum mare.<\/p>\n

Ceramica din carbur\u0103 de siliciu este utilizat\u0103 \u00eentr-o gam\u0103 larg\u0103 de aplica\u021bii \u00een industria aerospa\u021bial\u0103, extrac\u021bia energiei, industria electronic\u0103 \u0219i construc\u021biile mecanice, precum \u0219i \u00een rezisten\u021ba la foc, de exemplu \u00een urm\u0103toarele domenii:<\/p>\n

Rulmen\u021bi rotativi cu bile \u0219i role
\nComponente de motor rezistente la c\u0103ldur\u0103 \u0219i uzur\u0103
\nRacorduri pentru supape cu bil\u0103 industriale \u0219i chimice
\nSupape, garnituri de balansier, suprafe\u021be de etan\u0219are
\nSuporturi pentru bobine de \u00eenc\u0103lzire prin induc\u021bie
\nPalete de turbin\u0103, palete, g\u0103le\u021bi
\nDispozitive de sudare \u0219i lipire
\nComponente ale elementului de \u00eenc\u0103lzire
\nComponente pentru turbine sta\u021bionare \u0219i mobile
\nEtan\u0219\u0103ri, rulmen\u021bi, palete de pompare
\nPl\u0103ci de uzur\u0103 \u0219i armur\u0103 balistic\u0103
\nCuptoare \u0219i schimb\u0103toare de c\u0103ldur\u0103
\nEchipamente de procesare a pl\u0103cilor semiconductoare<\/p>\n

\"ceramic\u0103<\/a><\/p>","protected":false},"excerpt":{"rendered":"

Silicon carbide ceramics is a material with high strength, high thermal conductivity, acid and alkali corrosion resistance, it can adapt well to the external environment in the process of use, the industry is considered to be the best corrosion-resistant heat exchanger material. Ordinary ceramic materials in 1200 ~ 1400 \u2103 when the strength will be… Cite\u0219te mai mult »Unele propriet\u0103\u021bi \u0219i utiliz\u0103ri ale ceramicii din carbur\u0103 de siliciu<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","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":"","footnotes":""},"categories":[6],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/posts\/184"}],"collection":[{"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/comments?post=184"}],"version-history":[{"count":3,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/posts\/184\/revisions"}],"predecessor-version":[{"id":188,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/posts\/184\/revisions\/188"}],"wp:attachment":[{"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/media?parent=184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/categories?post=184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/advance-ceramics.com\/ro\/wp-json\/wp\/v2\/tags?post=184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}