Zeolit ve mermer tozu kullanılarak üretilen CAS seramiklere mekanik aktivasyonun etkisi

Abstract

Bu çalışmada CAS (CaO-Al₂O₃-SiO₂) seramikleri zeolit, mermer tozu ve alümina tozları kullanılarak; 400 dev/dk ve 600 dev/dk hızlarında mekanik aktivasyon ile üretilmiştir. Aktive edilen tozlar pres yardımı ile şekillendirildikten sonra 1000^oC-1200^oC sıcaklık aralığında 1-5 saat süre ile sinterlenmiştir. Aktivasyon öncesi ve sonrası tozların ve sinterlenmiş ürünlerin faz analizi XRD yöntemi ile belirlenmiş; mikroyapı analizleri ise SEM ile görüntülenmiştir. Aktivasyon sonrası tozlarda amorflaşma tespit edilirken, aktivasyon hızının artması ile tane boyutu azalması ile beraber aglomerasyonlaşma da gözlenmiştir. Sinterleme sonucu gözenekli yapı oluşmuş; sıcaklık 1200^oC’ye çıktığında gözenek çapı belirgin şekilde artmıştır.

Keywords

• Mekanik aktivasyon,Zeolit,Mermer tozu,CAS seramikler

Effect of mechanical activation on CAS ceramics from produced using zeolite and marble powder

Abstract

In this study, CAS (CaO-Al₂O₃-SiO₂) based ceramics were produced by mechanically activation at speeds of 400 and 600 rpm using zeolite, marble powders and alumina. The activated powders were sintered at 1000-1200^oC temperature for 1-5 hours after shaped by hydraulic press. Phase analysis of activated and non-activated powders and sintered products were determined by XRD method. Scaning electron microscopy (SEM) was used to analyze the microstructure of samples. After activation amorphization was detected in the powders, while agglomeration was observed with the increase of the activation rate and the decrease of the grain size. As a result of sintering, a porous structure was formed; when the temperature went up to 1200 ^oC, the pore sizes increased noticeably.

Keywords

• mechanical activation,zeolite,marble powders,CAS ceramics

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