Investigation on Sintering Behaviour of Sol Gel Coated Seydişehir Alumina with TiO2

Year 2020, Volume: 32 Issue: 2, 192 - 196, 30.06.2020

Zeynep Taşlıçukur Öztürk , Selin Engürlü Nilgün Kuşkonmaz

https://doi.org/10.7240/jeps.631637

Abstract

In
this study, we report the sinterability of Seydişehir α-Al₂O₃ by
coating TiO₂ colloidal
particles by sol-gel method. In
this context, efforts have been made to decrease the amount of impurities with
washing process, to stabilize transformation with calcination and to reduce
grain size by jet-mill grinding. It is aimed to increase the density of Al₂O₃
by coating TiO₂ by sol-gel method. The ceramic powders were
dry-pressed, they were sintered at 1580⁰C for different hours(1h, 3h
and 6h). The role of TiO₂ content and sintering time on the
microstructural properties and density of final products were investigated.

Keywords

Al2O3, TiO2, Sintering

Supporting Institution

The Scientific Research Project Coordination of Yildiz Technical University

Project Number

2011-07-02-YÜLAP06

Thanks

This work is financially supported by Project number 2011-07-02-YÜLAP06. The authors wish to acknowledge the Scientific Research Project Coordination of Yildiz Technical University.

TiO2 ile Sol Jel Kaplanmış Seydişehir Alüminanın Sinterlenme Davranışının İncelenmesi

Abstract

Bu çalışmada, Seydişehir α-Al2O3,TiO2 kolloidal parçacıklar ile sol-jel yöntemiyle kaplanmış ve α-Al2O3’nın sinterlenebilirlik özellikleri rapor edilmiştir. Yıkama işlemi ile kirlilik miktarını azaltmaya, kalsine ile dönüşümü stabilize etmeye ve jet değirmen öğütme ile α- Al2O3’nın tane boyutu azaltılmaya çalışılmıştır. TiO2 sol-jel yöntemi kullanılarak kaplama ile Al2O3'ün yoğunluğunun arttırılması amaçlanmıştır. Seramik tozları kuru preslenmiş, farklı saatler (1 saat, 3 saat ve 6 saat) boyunca 1580 0C'de sinterlenmiştir. TiO2 içeriğinin ve sinterleme süresinin nihai ürünün mikroyapısal özellikleri ve yoğunluğu üzerindeki rolü araştırılmıştır.

Keywords

Al2O3, TiO2, Sinterleme

Project Number

2011-07-02-YÜLAP06

References

• [1] Yong, Y., You, W., Zheng, W., Gang L. and Wei, T. (2008). Preparation and sintering behaviour of nanostructured alumina/titania composite powders modified with nano-dopants. Mater. Sci. Eng. A., 490, 457-464.
• [2] Erten, R., Emrullahoğlu, C.B., Yazıcı, Z.O. and Emrullahoğlu, Ö.F. (2004). An investigation on injection moulding of Seydişehir alumina. Key Eng. Mater., Vols. 264-268, 2523-2526.
• [3] Palacı, Y.(2001). Alüminanın özelliklerine, şekillendirme yönteminin, katkılarının ve sinterleme sıcaklığının etkisi. Doktora Tezi, İstanbul Teknik Üniversitesi, Türkiye, p. 8-10.
• [4] Engürlü, S., Taşlıçukur Öztürk, Z. and Kuşkonmaz, N. (2017). Investigation of the production of β-Al2O3 solid electrolyte from Seydişehir α-Al2O3. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt 21 (3),816-819.
• [5] Jayasankar, M., Ananthakumar, S., Mukundan, P., Wunderlich, W. and Warrier, K.G.K.(2008). Al2O3 @ TiO2-A simple sol–gel strategy to the synthesis of low temperature sintered alumina–aluminium titanate composites through a core–shell approach. J. Sol. St. Chem., 181,2748–2754.
• [6] Avcı, G.G., Mısırlı, Z. and Günay, V. (1996). Processing and characterization of microfiltration supports prepared from alumina powders. Cer. Inter., 22, 23-26.
• [7] Ahmed, M.A., Abdel-Messih, M.F. (2011). Structural and nano-composite features of TiO2–Al2O3 powders prepared by sol–gel method. J. Alloys Comp., 509,2154–2159.
• [8] Arıer, U.Ö.A. and Tepehan, F.Z. (2013). Influence of Al2O3:TiO2 ratio on the structural and optical properties of TiO2–Al2O3 nano-composite films produced by sol gel method. Comp.: Part B., 58, 147–151.
• [9] Toygun, Ş., Köneçoğlu, G. and Kalpaklı, Y. (2013). General principles of sol – gel. J. Eng. Nat. Sci. Sig., 31, 456-476.
• [10] Dascalescu, T., Todan, L., Rusu, A., Preda, S., Andronescu, C.,Culita, D.C., Munteanu, C. and Zaharescu, M. (2014). Nanosized Al2O3-TiO2 oxide powder with enhanced porosity obtained by sol-gel method. Rev. Roum. Chim., 59 (2), 125-134.
• [11] Farias, R.F., Arnold, U., Martı´nez, L., Schuchardt, U., Jannini, M.J.D.M. and Airoldi, C. (2003). Synthesis, characterization and catalytic properties of sol–gel derived mixed oxides. J. Phys. Chem. Sol., 64, 2385–2389.
• [12] Jung, Y., Kim, D., Kim, Y., Park, E. and Baeck, S. (2008). Synthesis of alumina–titania solid solution by sol–gel method. J. Phy. Chem. Sol., 69, 1464–1467.
• [13] Leblebicier, Y., Yüzer, H. and Emrullahoğlu, Ö.F. (2000). Sol Jel metodu ile mikronaltı incelikte alümina üretimi. Afyon Kocatepe University J. Sci., 2 (1),1-12.
• [14] Shi-Jie, S., Li-Ping, Y., Xiao-Min, L., Xiao-Ling, W., Hui, Y. and Xiao-Dong, S. (2013). Preparation and characterization of TiO2 doped and MgO stabilized Na–β″-Al2O3 electrolyte via a citrate sol–gel method. J. All. Comp., 563, 176–179.
• [15] Yang, L.P, Shan, S., Wei, X., Liu, X., Yang, H. and Shen, X. (2014). The mechanical and electrical properties of ZrO2–TiO2–Na-β/β″-alumina composite electrolyte synthesized via a citratesol–gel method. Cer. Inter., 40 9055–9060.
• [16] Habibpanah, A.A., Pourhashem, S. and Sarpoolaky, H. (2011). Preparation and characterization of photocatalytic titania–alumina composite membranes by sol–gel methods. J. Eur. Cer. Soc., 31, 2867–2875.
• [17] Akbarnezhad, Sh., Mousavi, S.M. and Sarhaddi, R. (2010). Sol-gel synthesis of alumina-titania ceramic membrane: Preparation and characterization. Ind. J. Sci. Tech., Vol. 3 No. 10 ISSN: 0974- 6846, 1048-1051.
• [18] Mohammadi, M.R. (2014). Semiconductor TiO2–Al2O3 thin film gas sensors derived from aqueous particulate sol–gel process. Mater. Sci. Semi. Proc., 27,711–718.
• [19] Dorian, A.H.H., Wanqiang, X., Michael, F. and Charles, C.S. (2012). Abnormal grain growth of rutile TiO2 induced by ZrSiO4. J. Cry. Grow., Volume 359 83-91.