{"id":125455,"date":"2023-01-29T16:05:42","date_gmt":"2023-01-29T08:05:42","guid":{"rendered":"https:\/\/www.alpapowder.com\/125455\/"},"modified":"2023-01-29T16:05:43","modified_gmt":"2023-01-29T08:05:43","slug":"metalik-olmayan-cevher-tozunun-ultra-ince-kirma-isleminden-sonra-fiziksel-ve-kimyasal-degisimleri-nelerdir","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/tr\/125455\/","title":{"rendered":"Metalik olmayan cevher tozunun ultra ince k\u0131rma i\u015fleminden sonra fiziksel ve kimyasal de\u011fi\u015fimleri nelerdir?"},"content":{"rendered":"

\"\"<\/p>\n

Ultra ince toz haline getirme i\u015flemi, yaln\u0131zca par\u00e7ac\u0131k boyutunu k\u00fc\u00e7\u00fcltme i\u015flemi de\u011fildir. Malzeme mekanik kuvvetle ezildi\u011finde, par\u00e7ac\u0131k boyutunun k\u00fc\u00e7\u00fclmesine toz haline getirilmi\u015f malzemenin kristal yap\u0131s\u0131nda ve fiziksel ve kimyasal \u00f6zelliklerinde farkl\u0131 de\u011fi\u015fiklikler e\u015flik eder. Nispeten kaba k\u0131rma i\u015flemi i\u00e7in bu de\u011fi\u015fiklik yok denecek kadar azd\u0131r, ancak ultra ince k\u0131rma i\u015flemi i\u00e7in uzun k\u0131rma s\u00fcresi, y\u00fcksek k\u0131rma mukavemeti ve malzemenin tane boyutunun mikron d\u00fczeyinde veya daha k\u00fc\u00e7\u00fck olmas\u0131 nedeniyle bu de\u011fi\u015fiklikler \u00f6nemli \u00f6l\u00e7\u00fcde meydana gelir. belirli k\u0131rma i\u015flemleri ve ko\u015fullar\u0131 alt\u0131nda.<\/p>\n

\u00c7al\u0131\u015fmalar, yukar\u0131da belirtilen mekanokimyasal olaylar\u0131n \u00f6nemli \u00f6l\u00e7\u00fcde ortaya \u00e7\u0131kaca\u011f\u0131n\u0131 veya yaln\u0131zca ultra ince \u00f6\u011f\u00fctme veya ultra ince \u00f6\u011f\u00fctme i\u015flemi s\u0131ras\u0131nda tespit edilece\u011fini g\u00f6stermi\u015ftir. Bunun nedeni, ultra ince k\u0131rman\u0131n, ezilmi\u015f \u00fcr\u00fcn birimi ba\u015f\u0131na y\u00fcksek enerji t\u00fcketimi olan bir i\u015flem olmas\u0131, mekanik kuvvetin g\u00fcc\u00fcn\u00fcn g\u00fc\u00e7l\u00fc olmas\u0131, malzeme k\u0131rma s\u00fcresinin uzun olmas\u0131 ve ezilmi\u015f malzemenin \u00f6zg\u00fcl y\u00fczey alan\u0131 ve y\u00fczey enerjisinin b\u00fcy\u00fck olmas\u0131d\u0131r.<\/p>\n

1. Kristal yap\u0131daki de\u011fi\u015fiklikler<\/p>\n

Ultra ince \u00f6\u011f\u00fctme i\u015flemi s\u0131ras\u0131nda, g\u00fc\u00e7l\u00fc ve kal\u0131c\u0131 mekanik kuvvet nedeniyle, toz malzeme de\u011fi\u015fen derecelerde kafes bozulmas\u0131na maruz kal\u0131r, tane boyutu k\u00fc\u00e7\u00fcl\u00fcr, yap\u0131 d\u00fczensizle\u015fir, y\u00fczeyde amorf veya kristal olmayan maddeler olu\u015fur, ve hatta Polikristal d\u00f6n\u00fc\u015f\u00fcm.<\/p>\n

Bu de\u011fi\u015fiklikler, X-\u0131\u015f\u0131n\u0131 k\u0131r\u0131n\u0131m\u0131, k\u0131z\u0131l\u00f6tesi spektroskopi, n\u00fckleer manyetik rezonans, elektron paramanyetik rezonans ve diferansiyel kalorimetri ile tespit edilebilir.<\/p>\n

2. Fiziksel ve kimyasal \u00f6zelliklerdeki de\u011fi\u015fiklikler<\/p>\n

Mekanik aktivasyon nedeniyle, malzemelerin \u00e7\u00f6z\u00fcnme, sinterleme, adsorpsiyon ve reaktivite, hidrasyon performans\u0131, katyon de\u011fi\u015fim performans\u0131 ve y\u00fczey elektriksel \u00f6zellikleri gibi fiziksel ve kimyasal \u00f6zellikleri, ince \u00f6\u011f\u00fctme veya ultra ince \u00f6\u011f\u00fctme sonras\u0131nda de\u011fi\u015fen derecelerde de\u011fi\u015fecektir.<\/p>\n

(1) \u00c7\u00f6z\u00fcn\u00fcrl\u00fck<\/p>\n

Toz kuvars, kalsit, kasiterit, korindon, boksit, kromit, manyetit, galen, titanit, volkanik k\u00fcl, kaolin<\/a> vb. ince \u00f6\u011f\u00fctme veya ultra ince \u00f6\u011f\u00fctme sonras\u0131 inorganik asitte \u00e7\u00f6z\u00fcnme h\u0131z\u0131 ve \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc artar.<\/p>\n

(2) Sinterleme performans\u0131<\/p>\n

\u0130nce \u00f6\u011f\u00fctme veya \u00e7ok ince \u00f6\u011f\u00fctme nedeniyle malzemelerin termal \u00f6zelliklerinde iki ana de\u011fi\u015fiklik t\u00fcr\u00fc vard\u0131r:<\/p>\n

Birincisi, malzemenin da\u011f\u0131l\u0131m\u0131ndaki art\u0131\u015f nedeniyle kat\u0131 hal reaksiyonu kolayla\u015f\u0131r, \u00fcr\u00fcn\u00fcn sinterleme s\u0131cakl\u0131\u011f\u0131 d\u00fc\u015fer ve \u00fcr\u00fcn\u00fcn mekanik \u00f6zellikleri de geli\u015fir. \u00d6rne\u011fin, dolomit titre\u015fimli bir de\u011firmende ince \u00f6\u011f\u00fct\u00fcld\u00fckten sonra onunla haz\u0131rlanan refrakter malzemelerin sinterleme s\u0131cakl\u0131\u011f\u0131 375-573K d\u00fc\u015f\u00fcr\u00fcl\u00fcr ve malzemenin mekanik \u00f6zellikleri iyile\u015ftirilir.<\/p>\n

\u0130kincisi, kristal yap\u0131daki de\u011fi\u015fiklik ve amorfizasyon, kristal faz ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131nda kaymaya yol a\u00e7ar. \u00d6rne\u011fin, alfa kuvars\u0131n beta kuvars ve kristobalite ve kalsitin aragonite d\u00f6n\u00fc\u015f\u00fcm s\u0131cakl\u0131\u011f\u0131n\u0131n t\u00fcm\u00fc ultra ince \u00f6\u011f\u00fctme ile de\u011fi\u015ftirilir.<\/p>\n

(3) Katyon de\u011fi\u015fim kapasitesi<\/p>\n

Baz\u0131 silikat mineralleri, \u00f6zellikle bentonit ve kaolin<\/a> gibi baz\u0131 kil mineralleri, ince \u00f6\u011f\u00fctme veya \u00e7ok ince \u00f6\u011f\u00fctme sonras\u0131nda katyon de\u011fi\u015fim kapasitesinde bariz de\u011fi\u015fikliklere sahiptir.<\/p>\n

Belirli bir s\u00fcre \u00f6\u011f\u00fct\u00fcld\u00fckten sonra kaolinin hem iyon de\u011fi\u015ftirme kapasitesi hem de de\u011fi\u015ftirme kapasitesi artm\u0131\u015f, bu da de\u011fi\u015febilir katyon say\u0131s\u0131n\u0131n artt\u0131\u011f\u0131n\u0131 g\u00f6stermektedir.<\/p>\n

Bentonit, kaolin<\/a> ve zeolitin yan\u0131 s\u0131ra talk, refrakter kil ve mika gibi di\u011ferlerinin iyon de\u011fi\u015ftirme kapasitesi de ince \u00f6\u011f\u00fctme veya ultra ince \u00f6\u011f\u00fctme sonras\u0131nda de\u011fi\u015fen derecelerde de\u011fi\u015fir.<\/p>\n

(4) Hidrasyon performans\u0131 ve reaktivite<\/p>\n

Kalsiyum hidroksit malzemesinin reaktivitesi, yap\u0131 malzemelerinin haz\u0131rlanmas\u0131nda \u00e7ok \u00f6nemli olan ince \u00f6\u011f\u00fctme ile iyile\u015ftirilebilir. \u00c7\u00fcnk\u00fc bu malzemeler inerttir veya hidrasyon i\u00e7in yeterince aktif de\u011fildir.<\/p>\n

(5) Elektrik<\/p>\n

\u0130nce veya \u00e7ok ince \u00f6\u011f\u00fctme, minerallerin y\u00fczey elektriksel ve dielektrik \u00f6zelliklerini de etkiler. \u00d6rne\u011fin, biyotitin darbeli k\u0131rma ve \u00f6\u011f\u00fctme i\u015fleminden sonra izoelektrik noktas\u0131 ve y\u00fczey zeta potansiyeli (Zeta potansiyeli) tamamen de\u011fi\u015fir.<\/p>\n

(6) Yo\u011funluk<\/p>\n

Do\u011fal zeolitler (esas olarak klinoptilolit, mordenit ve kuvarstan olu\u015fur) ve sentetik zeolitler (esas olarak mordenit) bir gezegen bilyeli de\u011firmende \u00f6\u011f\u00fct\u00fcld\u00fc ve iki zeolitin yo\u011funluklar\u0131 farkl\u0131 \u015fekilde de\u011fi\u015fti.<\/p>\n

(7) Kil s\u00fcspansiyonlar\u0131n\u0131n ve hidrojellerin \u00f6zellikleri<\/p>\n

Islak \u00f6\u011f\u00fctme, kilin plastisitesini ve kuru e\u011filme mukavemetini geli\u015ftirir. Aksine kuru \u00f6\u011f\u00fctme, malzemenin plastisitesini ve kuru e\u011filme mukavemetini k\u0131sa s\u00fcrede art\u0131r\u0131r, \u00f6\u011f\u00fctme s\u00fcresinin uzamas\u0131yla azalma e\u011filimine girer.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultra ince toz haline getirme i\u015flemi, yaln\u0131zca par\u00e7ac\u0131k boyutunu k\u00fc\u00e7\u00fcltme i\u015flemi de\u011fildir. Malzeme mekanik kuvvetle ezildi\u011finde, par\u00e7ac\u0131k boyutunun k\u00fc\u00e7\u00fclmesine toz haline getirilmi\u015f malzemenin kristal yap\u0131s\u0131nda ve fiziksel ve kimyasal \u00f6zelliklerinde farkl\u0131 de\u011fi\u015fiklikler e\u015flik eder.<\/p>\n","protected":false},"author":7,"featured_media":125416,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[851],"tags":[],"class_list":["post-125455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-endustri-haberleri-tr"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/125455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/comments?post=125455"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/125455\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media\/125416"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media?parent=125455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/categories?post=125455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/tags?post=125455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}