Preparation and Characterization of Nanocrystalline Titania
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Çağlar, Özlem
Çiftçioğlu, Muhsin
Güden, Mustafa
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Abstract
Nanokristal seramikler, ileri seramiklerin gelecekteki uygulamalannda önemli etkileri olabilecek özgün kimyasal, fiziksel ve mekanik özelliklere sahiptir. Bu çalışmada, tItanyum; izopropoksit'ten titan seramikleri hazırlanması ve karakterizasyonu incelendi. Şekillendirilmiş yapılar 650-850 C aralığında hava ortamında sinterlendi. Sol-jel prosesi ve jellerin kontrollü kurutulması ile elde edilen seramiklerin yoğunluklan teorik yoğrunluğun %79-99' u olarak bulundu. Sollar, jeller ve çökertme yöntemleriyle hazırlanan tozlardan preslenen peletlerin sinterlerne işlemi öncesi ve sonrası yoğunlukları sırasıyla teorik yoğunluğun %40-52 ve %55-83' ü olarak bulundu.
Nanocrystalline ceramics possess unique chemical, physical and meehanical properties which may have a significant impact on the future applications of advanced cemmies. The preparatiion and characterization of titania ceramics from titanium isopropoxide precursor was investigated in this work. Green bodies were air gintered in the 650-850°C range for the determination of the sintering behaviour. The sintered densities of the cerainics prepared by sol-gel processing and controlled drying of the gels were in the 79-99% of theoretical density. The green and sintered densities of the pellets prepared by uniaxial pressing of powders derived from sols, gels and precipitation were in the 40-52% and 55-83% respectively.
Nanocrystalline ceramics possess unique chemical, physical and meehanical properties which may have a significant impact on the future applications of advanced cemmies. The preparatiion and characterization of titania ceramics from titanium isopropoxide precursor was investigated in this work. Green bodies were air gintered in the 650-850°C range for the determination of the sintering behaviour. The sintered densities of the cerainics prepared by sol-gel processing and controlled drying of the gels were in the 79-99% of theoretical density. The green and sintered densities of the pellets prepared by uniaxial pressing of powders derived from sols, gels and precipitation were in the 40-52% and 55-83% respectively.
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Nanokristal seramikler, Titan, Sinterleme, Sol-Gel, Nanocrystalline ceramics, Titania, Sintering
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Citation
Çağlar, Ö., Çiftçioğlu, M., & Güden, M. (2001). Preparation and characterization of nanocrystalline titania. V. Günay & O. Yücel (Ed.), V. Uluslararası Katılımlı Seramik Kongresi (s. 26-31). İstanbul, Türkiye: Türk Seramik Derneği.
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Start Page
26
End Page
31
