{"id":110734,"date":"2021-08-31T17:12:23","date_gmt":"2021-08-31T09:12:23","guid":{"rendered":"https:\/\/www.alpapowder.com\/110734\/"},"modified":"2021-08-31T17:18:35","modified_gmt":"2021-08-31T09:18:35","slug":"kuresel-alumina-hazirlama-yontemi","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/tr\/110734\/","title":{"rendered":"K\u00fcresel al\u00fcmina haz\u0131rlama y\u00f6ntemi"},"content":{"rendered":"<p>K\u00fcresel al\u00fcmina ayr\u0131ca kum al\u00fcmina, alfa al\u00fcmina olarak da adland\u0131r\u0131l\u0131r. \u03b1-tipi al\u00fcminan\u0131n kristal kafesinde, oksijen iyonlar\u0131 alt\u0131genler halinde yo\u011fun bir \u015fekilde paketlenir ve AI<sup>3+<\/sup> oksijen iyonlar\u0131 ile \u00e7evrili oktahedral koordinasyon merkezinde simetrik olarak da\u011f\u0131t\u0131l\u0131r. Kafes enerjisi b\u00fcy\u00fckt\u00fcr, bu nedenle erime noktas\u0131 ve kaynama noktas\u0131 y\u00fcksektir. Korozyon direnci, a\u015f\u0131nma direnci, y\u00fcksek s\u0131cakl\u0131k direnci, y\u00fcksek mukavemet, iyi yal\u0131t\u0131m, geni\u015f y\u00fczey alan\u0131, y\u00fcksek sertlik ve oksidasyon direnci \u00f6zelliklerine sahiptir.<\/p>\n<h4>K\u00fcresel al\u00fcmina haz\u0131rlama s\u00fcreci<\/h4>\n<ul>\n<li><strong>Bilyal\u0131 \u00f6\u011f\u00fctme y\u00f6ntemi (y\u00fcksek enerjili bilyal\u0131 \u00f6\u011f\u00fctme)<\/strong><\/li>\n<\/ul>\n<p>Bilyal\u0131 \u00f6\u011f\u00fctme, ultra ince al\u00fcmina tozu haz\u0131rlamak i\u00e7in en yayg\u0131n y\u00f6ntemdir. Bilyal\u0131 de\u011firmenin kendisi, yerle\u015fik \u00e7elik bilyeli \u00f6\u011f\u00fctme ortam\u0131na sahip yatay bir silindirdir, b\u00f6ylece malzeme silindire girdikten sonra, \u00e7elik bilye ile \u00e7arp\u0131\u015fma taraf\u0131ndan \u00fcretilen darbe kuvveti, ezme etkisine ula\u015f\u0131r. Bilyal\u0131 \u00f6\u011f\u00fctme i\u015flemi s\u0131ras\u0131nda bir \u00f6\u011f\u00fctme yard\u0131mc\u0131s\u0131 eklemek, toz partik\u00fcl boyutunun tek bi\u00e7imlili\u011fini iyile\u015ftirebilir.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-110683 size-full aligncenter\" src=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/nano-silica-1-1.jpg\" alt=\"\" width=\"1050\" height=\"410\" srcset=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/nano-silica-1-1.jpg 1050w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/nano-silica-1-1-300x117.jpg 300w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/nano-silica-1-1-1024x400.jpg 1024w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/nano-silica-1-1-768x300.jpg 768w\" sizes=\"(max-width: 1050px) 100vw, 1050px\" \/><\/p>\n<p>Y\u00fcksek enerjili bilyeli \u00f6\u011f\u00fctme ile ultra ince al\u00fcmina tozunun haz\u0131rlanmas\u0131n\u0131 etkileyen fakt\u00f6rler bilyeli \u00f6\u011f\u00fctme s\u00fcresi ve bilyeli \u00f6\u011f\u00fctme h\u0131z\u0131d\u0131r. Avantajlar\u0131 basit kullan\u0131m, d\u00fc\u015f\u00fck maliyet ve y\u00fcksek \u00e7\u0131kt\u0131d\u0131r. Dezavantaj\u0131, \u00fcr\u00fcn\u00fcn par\u00e7ac\u0131k boyutu da\u011f\u0131l\u0131m\u0131n\u0131n d\u00fczg\u00fcn olmamas\u0131, minimum par\u00e7ac\u0131k boyutunun mekanik olarak s\u0131n\u0131rland\u0131r\u0131lmas\u0131 ve k\u00fcresel par\u00e7ac\u0131klar\u0131n elde edilmesinin zor olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>Polimer a\u011f sol-jel y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>Avantaj\u0131, haz\u0131rlanan al\u00fcmina tozunun k\u00fc\u00e7\u00fck bir par\u00e7ac\u0131k boyutuna sahip olmas\u0131d\u0131r. Dezavantaj\u0131, k\u00fcreselli\u011fin \u00e7ok zay\u0131f olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>alkoksit hidrolizi<\/strong><\/li>\n<\/ul>\n<p>Avantaj\u0131, haz\u0131rlanan tozun par\u00e7ac\u0131k boyutunun k\u00fc\u00e7\u00fck olmas\u0131d\u0131r. Dezavantaj\u0131 ise maliyetin \u00e7ok y\u00fcksek olmas\u0131 ve k\u00fcreselli\u011fin zay\u0131f olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>\u015eablon y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>\u015eablon y\u00f6ntemi, i\u015flemdeki morfolojiyi kontrol etmek i\u00e7in bir reaktif olarak k\u00fcresel bir ham madde kullan\u0131r. \u00dcr\u00fcn genellikle i\u00e7i bo\u015ftur veya \u00e7ekirdek-kabuk yap\u0131s\u0131na sahiptir.<\/p>\n<p>Ana i\u015flem, bir \u015fablon olarak polistiren mikro k\u00fcreleri kullanmak, karbonik asit ile i\u015flevselle\u015ftirilmi\u015f al\u00fcmina nanopar\u00e7ac\u0131klar\u0131 ile kaplamak ve daha sonra i\u00e7i bo\u015f al\u00fcmina k\u00fcreleri haz\u0131rlamak i\u00e7in toluen ile y\u0131kamakt\u0131r.<\/p>\n<p>Avantaj, i\u00e7i bo\u015f k\u00fcreler haz\u0131rlaman\u0131n iyi bir yoludur. Dezavantajlar\u0131, \u015fablon ajan i\u00e7in y\u00fcksek gereksinimler, haz\u0131rlama s\u00fcrecindeki bir\u00e7ok ad\u0131m ve zor i\u015flemdir.<\/p>\n<ul>\n<li><strong>Aerosol ayr\u0131\u015ft\u0131rma y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>Aerosol ayr\u0131\u015fmas\u0131 genellikle al\u00fcminyum alkoksitleri hammadde olarak al\u0131r, kolayca hidrolize ve y\u00fcksek s\u0131cakl\u0131kta piroliz i\u00e7in al\u00fcminyum alkoksitlerin \u00f6zelliklerini kullan\u0131r ve al\u00fcminyum alkoksitleri buharla\u015ft\u0131rmak i\u00e7in fiziksel faz de\u011fi\u015fimi ara\u00e7lar\u0131n\u0131 kullan\u0131r ve daha sonra hidrolize etmek ve atomize etmek i\u00e7in su buhar\u0131 ile temas eder. . Y\u00fcksek s\u0131cakl\u0131kta kurutma veya do\u011frudan y\u00fcksek s\u0131cakl\u0131kta pirolizden sonra gaz-s\u0131v\u0131-kat\u0131 veya gaz-kat\u0131 faz d\u00f6n\u00fc\u015f\u00fcm\u00fc ger\u00e7ekle\u015ftirilir ve son olarak k\u00fcresel al\u00fcmina tozu olu\u015fturulur.<\/p>\n<p>Avantajlar\u0131, suyun ayr\u0131\u015fmas\u0131n\u0131n alkali eklenmeden ger\u00e7ekle\u015ftirilebilmesi, reaksiyon ko\u015fullar\u0131n\u0131n hafif olmas\u0131 ve i\u015flemin basit olmas\u0131d\u0131r. Dezavantaj\u0131 y\u00fcksek maliyettir.<\/p>\n<ul>\n<li><strong>topu b\u0131rak<\/strong><\/li>\n<\/ul>\n<p>Damla topu y\u00f6ntemi, al\u00fcmina solunu ya\u011f tabakas\u0131na (genellikle parafin, <a class=\"wpil_keyword_link\" href=\"https:\/\/www.alpapowder.com\/projects\/minerals\/\"   title=\"mineral\" data-wpil-keyword-link=\"linked\">mineral<\/a> ya\u011f, vb.) d\u00fc\u015f\u00fcrmek ve y\u00fczey geriliminin etkisiyle k\u00fcresel sol par\u00e7ac\u0131klar\u0131 olu\u015fturmak ve daha sonra sol par\u00e7ac\u0131klar\u0131 amonyak \u00e7\u00f6zeltisinde jelle\u015ftirmek ve son olarak jel par\u00e7ac\u0131klar\u0131 K\u00fcresel al\u00fcmina olu\u015fturmak i\u00e7in bir kurutma ve sinterleme y\u00f6ntemi.<\/p>\n<p>Avantaj\u0131, em\u00fclsiyon teknolojisinin solun ya\u015flanma a\u015famas\u0131na uygulanmas\u0131 ve toz ve ya\u011fl\u0131 reaktiflerin ayr\u0131lmas\u0131 ihtiyac\u0131n\u0131 ortadan kald\u0131rarak ya\u011f faz\u0131n\u0131n bozulmadan tutulmas\u0131d\u0131r. Dezavantaj\u0131, genellikle, esas olarak adsorbanlar veya kataliz\u00f6r destekleri i\u00e7in kullan\u0131lan daha b\u00fcy\u00fck par\u00e7ac\u0131k boyutuna sahip k\u00fcresel al\u00fcmina haz\u0131rlamak i\u00e7in kullan\u0131lmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>Radyo frekans\u0131 ind\u00fcksiyon plazma y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>D\u00fczensiz \u015fekilli al\u00fcmina par\u00e7ac\u0131klar\u0131, bir besleme tabancas\u0131 arac\u0131l\u0131\u011f\u0131yla bir ta\u015f\u0131y\u0131c\u0131 gaz taraf\u0131ndan plazma torcu i\u00e7ine p\u00fcsk\u00fcrt\u00fcl\u00fcr ve h\u0131zla \u0131s\u0131t\u0131l\u0131r ve eritilir. Erimi\u015f par\u00e7ac\u0131klar, y\u00fczey geriliminin etkisi alt\u0131nda olduk\u00e7a k\u00fcresel damlac\u0131klar olu\u015fturur ve \u00e7ok k\u0131sa s\u00fcrede i\u00e7 k\u0131s\u0131m h\u0131zla kat\u0131la\u015farak k\u00fcresel par\u00e7ac\u0131klar olu\u015fturur.<\/p>\n<ul>\n<li><strong>alev eritme<\/strong><\/li>\n<\/ul>\n<p>Alevle eritme y\u00f6ntemi, d\u00fczensiz \u015fekilli al\u00fcmina tozunu aleve do\u011frudan p\u00fcsk\u00fcrtmektir, b\u00f6ylece al\u00fcmina tozu alev i\u00e7inde bir top halinde eritilir.<\/p>\n<p>Avantaj\u0131, i\u015flemin basit olmas\u0131, maliyet kontrol\u00fcn\u00fcn plazma alev p\u00fcsk\u00fcrtme y\u00f6ntemine g\u00f6re daha avantajl\u0131 olmas\u0131, k\u00fcreselle\u015ftirilmi\u015f \u00fcr\u00fcn\u00fcn y\u00fcksek termal iletkenli\u011fe, iyi k\u00fcreselli\u011fe ve kontrol edilebilir par\u00e7ac\u0131k boyutuna sahip olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>homojen ya\u011f\u0131\u015f<\/strong><\/li>\n<\/ul>\n<p>Homojen \u00e7\u00f6keltme y\u00f6ntemindeki \u00e7\u00f6keltme i\u015flemi, kristal \u00e7ekirdeklerin olu\u015fumu, ard\u0131ndan aglomerasyon ve b\u00fcy\u00fcme ve son olarak genellikle denge d\u0131\u015f\u0131 bir durumda \u00e7\u00f6zeltiden \u00e7\u00f6kelme i\u015flemidir, ancak homojen \u00e7\u00f6zeltideki \u00e7\u00f6keltme maddesinin konsantrasyonu ise yava\u015f da olsa azalt\u0131labilir \u00c7ekirdeklerin olu\u015fumu e\u015fit bir \u015fekilde \u00e7ok say\u0131da k\u00fc\u00e7\u00fck kristal \u00e7ekirdek \u00fcretecek ve sonu\u00e7ta ortaya \u00e7\u0131kan ince \u00e7\u00f6kelme par\u00e7ac\u0131klar\u0131 t\u00fcm \u00e7\u00f6zelti i\u00e7inde e\u015fit olarak da\u011f\u0131lacak ve uzun bir s\u00fcre boyunca bir denge durumunu koruyacakt\u0131r. Bu ya\u011f\u0131\u015f elde etme y\u00f6ntemine homojen ya\u011f\u0131\u015f y\u00f6ntemi denir.<\/p>\n<p>Avantajlar\u0131 basit proses, d\u00fc\u015f\u00fck maliyet, y\u00fcksek safl\u0131k, ekipman\u0131n seri \u00fcretimi, basit imalat ve k\u0131sa proses ak\u0131\u015f\u0131d\u0131r. Dezavantaj\u0131, mevcut kolloidlerin \u00e7\u00f6keltilmesi, y\u0131kanmas\u0131 ve filtre edilmesinin zor olmas\u0131, tozun \u00e7\u00f6keltici madde ile kar\u0131\u015ft\u0131r\u0131lmas\u0131n\u0131n kolay olmas\u0131, toz bile\u015fenlerinin \u00e7\u00f6keltme s\u0131ras\u0131nda ayr\u0131lmas\u0131n\u0131n kolay olmamas\u0131, \u00e7\u00f6keltinin y\u0131kama i\u015flemi s\u0131ras\u0131nda yeniden \u00e7\u00f6z\u00fclebilmesi ve \u00e7\u00f6keltici madde ayr\u0131ca b\u00fcy\u00fck miktarda kompleks iyonlara neden olacakt\u0131r.<\/p>\n<ul>\n<li><strong>em\u00fclsiyon y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>K\u00fcresel toz partik\u00fclleri elde etmek i\u00e7in, insanlar k\u00fc\u00e7\u00fck k\u00fcresel damlac\u0131klar \u00fcretmek i\u00e7in ya\u011f faz\u0131 ile su faz\u0131 aras\u0131ndaki aray\u00fczey gerilimini kullan\u0131rlar, b\u00f6ylece sol partik\u00fcllerin olu\u015fumu ve jelle\u015fmesi k\u00fc\u00e7\u00fck damlac\u0131klarla s\u0131n\u0131rl\u0131d\u0131r ve son olarak k\u00fcresel \u00e7\u00f6keltiler elde edilir. . par\u00e7ac\u0131klar.<\/p>\n<p>Avantaj\u0131 basit i\u015flemdir. Dezavantaj\u0131 ise maliyetin \u00e7ok y\u00fcksek olmas\u0131 ve k\u00fcreselli\u011fin zay\u0131f olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>Sol-em\u00fclsiyon-sol y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>Takashi Ogihara et al. Sol-jel i\u015flemiyle k\u00fcresel al\u00fcmina tozu haz\u0131rlamak i\u00e7in al\u00fcminyum alkoksit hidrolizi kulland\u0131. T\u00fcm hidroliz sistemi nispeten karma\u015f\u0131kt\u0131r. Bunlar\u0131n aras\u0131nda, oktanol \u00e7\u00f6z\u00fcc\u00fc al\u00fcminyum alkoksit %50&#8217;yi, etanol \u00e7\u00f6z\u00fcc\u00fcs\u00fc %40&#8217;\u0131 ve oktanol b\u00fctanol suyu da\u011f\u0131t\u0131r. Alkol s\u0131ras\u0131yla %9 ve %1&#8217;di ve \u00e7ok iyi k\u00fcreselli\u011fe sahip k\u00fcresel y-al\u00fcmina tozu elde etmek i\u00e7in da\u011f\u0131t\u0131c\u0131 olarak propil sel\u00fcloz kullan\u0131ld\u0131.<\/p>\n<p>Avantaj\u0131, i\u015flem s\u0131ras\u0131nda hi\u00e7bir safs\u0131zl\u0131k iyonunun girmemesidir. Dezavantaj\u0131 ise hammadde fiyatlar\u0131n\u0131n y\u00fcksek olmas\u0131, elde edilen tozun partik\u00fcl boyutunun k\u00fc\u00e7\u00fck olmas\u0131 ve da\u011f\u0131l\u0131m\u0131n\u0131n dar olmas\u0131d\u0131r.<\/p>\n<ul>\n<li><strong>Sprey y\u00f6ntemi<\/strong><\/li>\n<\/ul>\n<p>K\u00fcresel al\u00fcmina haz\u0131rlamak i\u00e7in p\u00fcsk\u00fcrtme y\u00f6nteminin \u00f6z\u00fc, faz ge\u00e7i\u015fini nispeten k\u0131sa s\u00fcrede ger\u00e7ekle\u015ftirmektir. \u00dcr\u00fcn y\u00fczey geriliminin etkisiyle k\u00fcresel hale getirilmi\u015ftir. Faz ge\u00e7i\u015finin \u00f6zelliklerine g\u00f6re sprey piroliz, sprey kurutma ve sprey eritme olarak ayr\u0131labilir. Kanun.<\/p>\n<p>Avantajlar\u0131, kararl\u0131 kimyasal bile\u015fim, y\u00fcksek safl\u0131k, m\u00fckemmel performans ve seri \u00fcretimdir. Dezavantaj\u0131, yaln\u0131zca \u00e7\u00f6z\u00fcn\u00fcr tuzlar i\u00e7in etkili olmas\u0131 ve belirli s\u0131n\u0131rlamalara sahip olmas\u0131d\u0131r.<\/p>\n<h4>K\u00fcresel al\u00fcmina uygulamas\u0131<\/h4>\n<ul>\n<li><strong>Seramik malzeme<\/strong><\/li>\n<\/ul>\n<p>Ayn\u0131 i\u015flem ko\u015fullar\u0131 alt\u0131nda, k\u00fcresel al\u00fcmina tozu, malzemenin mikro yap\u0131s\u0131n\u0131 de\u011fi\u015ftirebilen, serami\u011fin mukavemetini ve yo\u011funlu\u011funu art\u0131rabilen, sinterleme s\u0131cakl\u0131\u011f\u0131n\u0131 azaltabilen ve serami\u011fin performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilen \u015fekil olarak avantajlara sahiptir.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-110670 size-full aligncenter\" src=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-Ceramic.jpg\" alt=\"\" width=\"1000\" height=\"500\" srcset=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-Ceramic.jpg 1000w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-Ceramic-300x150.jpg 300w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-Ceramic-768x384.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<ul>\n<li><strong>Y\u00fczey koruma katman\u0131 malzemesi<\/strong><\/li>\n<\/ul>\n<p>Plastik, boya, cam, ala\u015f\u0131m ve metal malzemelerin y\u00fczeyine ultra ince al\u00fcmina tozu p\u00fcsk\u00fcrtmek, malzemenin a\u015f\u0131nma direncini, korozyon direncini, stabilitesini ve y\u00fczey g\u00fcc\u00fcn\u00fc iyile\u015ftirebilir.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-110696 size-full aligncenter\" src=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-metal.jpg\" alt=\"\" width=\"1000\" height=\"500\" srcset=\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-metal.jpg 1000w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-metal-300x150.jpg 300w, https:\/\/www.alpapowder.com\/wp-content\/uploads\/2021\/08\/alumina-metal-768x384.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<ul>\n<li><strong>Kataliz\u00f6r ve kataliz\u00f6r ta\u015f\u0131y\u0131c\u0131<\/strong><\/li>\n<\/ul>\n<p>Ultra ince al\u00fcmina, g\u00fc\u00e7l\u00fc adsorpsiyon \u00f6zelliklerine sahiptir, bir\u00e7ok y\u00fczey aktif noktaya sahiptir, y\u00fcksek reaksiyon aktivitesi ve se\u00e7icili\u011fe sahiptir ve katalitik reaksiyonlar i\u00e7in gerekli ko\u015fullar\u0131 sa\u011flar. Do\u011frudan kataliz\u00f6r olarak kullan\u0131lan k\u00fcresel al\u00fcmina a\u015f\u0131nmay\u0131 azaltabilir ve kataliz\u00f6r\u00fcn hizmet \u00f6mr\u00fcn\u00fc uzatabilir, b\u00f6ylece \u00fcretim maliyetlerini azaltabilir.<\/p>\n<ul>\n<li><strong>Kimyasal mekanik parlatma a\u015f\u0131nd\u0131r\u0131c\u0131<\/strong><\/li>\n<\/ul>\n<p>Kimyasal mekanik cilalama, entegre devre yongalar\u0131nda, mikro elektronik mekanik sistemlerde ve bilgisayar sabit disklerinde yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Parlatma malzemesi olarak k\u00fcresel al\u00fcmina kayma izlerini \u00f6nleyebilir. K\u00fcresel al\u00fcmina tozu, parlak g\u00f6vdenin sa\u00e7\u0131lmas\u0131n\u0131 azaltabilen, iletilen \u0131\u015f\u0131k kayb\u0131n\u0131 etkili bir \u015fekilde azaltabilen ve b\u00f6ylece ekran\u0131n parlakl\u0131\u011f\u0131n\u0131 art\u0131rabilen y\u00fcksek bir paketleme yo\u011funlu\u011funa sahiptir.<\/p>\n<ul>\n<li><strong>\u0131\u015f\u0131ldayan malzeme<\/strong><\/li>\n<\/ul>\n<p>K\u00fcresel al\u00fcmina tozu, parlak g\u00f6vdenin sa\u00e7\u0131lmas\u0131n\u0131 azaltabilen, iletilen \u0131\u015f\u0131k kayb\u0131n\u0131 etkili bir \u015fekilde azaltabilen ve b\u00f6ylece ekran\u0131n parlakl\u0131\u011f\u0131n\u0131 art\u0131rabilen y\u00fcksek bir paketleme yo\u011funlu\u011funa sahiptir.<\/p>\n<ul>\n<li><strong>Petrokimya end\u00fcstrisi<\/strong><\/li>\n<\/ul>\n<p>Petrokimya end\u00fcstrisinde al\u00fcmina en yayg\u0131n olarak kullan\u0131lan ta\u015f\u0131y\u0131c\u0131d\u0131r.<\/p>\n<p>&nbsp;<\/p>\n<p>Makale kayna\u011f\u0131: \u00c7in Toz A\u011f\u0131<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K\u00fcresel al\u00fcmina ayr\u0131ca kum al\u00fcmina, alfa al\u00fcmina olarak da adland\u0131r\u0131l\u0131r. \u03b1-tipi al\u00fcminan\u0131n kristal kafesinde, oksijen iyonlar\u0131 alt\u0131genler halinde yo\u011fun bir \u015fekilde paketlenir ve AI3+ oksijen iyonlar\u0131 ile \u00e7evrili oktahedral koordinasyon merkezinde simetrik olarak da\u011f\u0131t\u0131l\u0131r. Kafes enerjisi b\u00fcy\u00fckt\u00fcr, bu nedenle erime noktas\u0131 ve kaynama noktas\u0131 y\u00fcksektir. Korozyon direnci, a\u015f\u0131nma direnci, y\u00fcksek s\u0131cakl\u0131k direnci, y\u00fcksek mukavemet, iyi yal\u0131t\u0131m, geni\u015f y\u00fczey alan\u0131, y\u00fcksek sertlik ve oksidasyon direnci \u00f6zelliklerine sahiptir.<\/p>\n","protected":false},"author":6,"featured_media":110720,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[830],"tags":[],"class_list":["post-110734","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/110734"}],"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\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/comments?post=110734"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/110734\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media\/110720"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media?parent=110734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/categories?post=110734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/tags?post=110734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}