Yazar "Mandal, H" için Bildiri Koleksiyonu listeleme
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Influence of type of cations on intergranular phase crystallisation of SiAlON ceramics
Açıkbaş, N. Çalış; Kara, Alpagut; Turan, Servet; Kara, Ferhat; Mandal, Hasan; Bitterlich, B. (Trans Tech Publications LTD, 2007)25 alpha:75 beta SiAION composition was designed with different cations and at different molar ratios. Effect of the type of cations both on the composition and the type of intergranular phase investigated after gas pressure ... -
Interactions between a bismuth type leadless glaze and a bone China body during glost firing
Kara, Alpagut; Stevens, R (Trans Tech Publications LTD, 2004)In the present study, the interactions between a high bismuth type commercial transparent leadless glaze and a biscuit fired bone china body during glost firing at different temperatures were investigated using SEM. The ... -
An investigation into bloating behaviour of bone China body during biscuit firing
Kara, Alpagut (Trans Tech Publications LTD, 2004)Amongst many studies on the textural, mineralogical and physical changes during biscuit firing of whiteware bodies, this paper attempts to investigate the bloating behaviour of a commercial bone china body during biscuit ... -
Investigation of parameters affecting formation of mullite from kaolin
Aksel, Cemail; Kalemtaş, Ayşe (Trans Tech Publications LTD, 2004)This study aims to improve the understanding of formation of mullite from kaolin at low process temperature using different sintering regimes. The optimum parameters affecting mullite formation from kaolin such as sintering ... -
Investigation of sanitaryware scrap behaviour in terracotta bodies
Kara, Alpagut; Işık, I; Uz, V; Sayarer, G (Trans Tech Publications LTD, 2004)In this paper, an investigation into a potential use of unfired body scrap from a local sanitaryware manufacturer in commercial terracotta production was presented. Experiments were achieved under laboratory conditions by ... -
Lanthanum titanate (La2Ti2O7) as an interphase material in alumina (Al2O3) based composites
Ceylan, Ali; Fuierer, PA (Trans Tech Publications LTD, 2004)The aim of this research is to fabricate and characterize alumina (Al2O3) / lanthanum titanate (La2Ti2O7) laminate ceramic composites. The interfacial bond between oxide laminates has a critical effect on the final mechanical ... -
Mechanical properties of alumina-mullite-zircon refractories
Aksel, Cemail (Trans Tech Publications LTD, 2004)The relationships between mechanical properties and microstructure of alumina-mullite-zircon refractories were investigated by varying zircon content. Various sintering temperatures were used for the slip-cast refractories ... -
Mg+2 and Ce+3 doped alpha-SiAlON ceramics
Kurama, Semra; Mandal, Hasan (Trans Tech Publications LTD, 2004)In the present work, stabilization of MgO and CeO2 in alpha-SiAlON structure is studied. Mg and CeO2 were used in 50:50 molar ratios as additives. The mixture was sintered at 1830degreesC for 1 hour in gas pressure sintering ... -
Microstructural evolution R-alpha-SiAlON ceramics (R=Y, Y+Sm and Sm)
Kurama, Semra; Mandal, Hasan (Trans Tech Publications LTD, 2004)Yttrium or samarium doped alpha-SiAlON composition was sintered using gas pressure sintering through two different sintering procedures. One group of samples was heated up to 1800degreesC and then held for 1 h while another ... -
Pressing behaviour of spray dried alumina-zirconia granules
Kara, Ferhat; Kara, Alpagut; Turan, Servet; Mandal, Hasan (Trans Tech Publications LTD, 2004)In this study, spray drying of alumina-zirconia slurries on a pilot scale, and their pressing behaviour were investigated. Slurries were prepared at 50 wt-% solid loading. An acrylic polymer emulsion, polyethylene glycol, ... -
Pressureless sintering of Al2O3-TiCN composites
Ayas, Erhan; Kara, Alpagut (Trans Tech Publications LTD, 2004)A composition of 70 wt % Al2O3 + 30 wt % TiCN was prepared and pressureless-sintered at temperatures ranging from 1700 to 1840degreesC. In order to achieve densification, a powder bed was also employed. The resultant ... -
Pressureless sintering of hexagonal boron nitride powders
Pressureless sintering of hexagonal boron nitride (BN) with and without additives was performed using a powder which was previously nitrided at 900 degrees C and then heat treated at 1400 degrees C. Sintering additives ... -
Producing cordierite from local magnesium sources
Topateş, Gülsüm; Mandal, Hasan (Trans Tech Publications LTD, 2004)Cordierite ceramics were produced by using local magnesium sources. Mixtures were sintered at different temperatures to examine formation of cordierite. a-cordierite was formed as a major phase over 1150degreesC. High bulk ... -
Production and characterisation of pigments produced using grinding waste from cast iron foundry
Turan, Servet; Inceefe, Y; Özel, Emel (Trans Tech Publications LTD, 2004)The brown and black pigments are generally synthesised from different powders such as iron (111) and chromium (111) oxide powders. In this study, iron-chromium pigments by using grinding waste from cast iron foundry as ... -
Production of blue willemite based pigments by using ZnO powder produced from metal slags
Özel, Emel; Turan, Servet (Trans Tech Publications LTD, 2004)In this study, production of pigments by adding different amount of Co and calcination at different temperatures were under-taken. Co-willemite blue pigments were produced by using ZnO powders produced from metal slags. ... -
Reaction model for the boron carbide/aluminium system
Arslan, Gökhan; Kara, Ferhat; Turan, Servet (Trans Tech Publications LTD, 2004)An attempt has been made to shed light on the reaction mechanism during the production of B4C/Al composites by making use of the measured phase contents of the phases B4C, Al, Al3BC and AlB2. It was found that the agreement ... -
Role of alpha-SiAlON nuclei addition on the rod-like y-sm alpha-SiAlON formations
Kuşhan, Seniz Reyhan; Acikbas, N. C.; Krestan, J.; Sajgalik, P.; Mandal, Hasan (Trans Tech Publications LTD, 2007)In this study, effect of seed addition on the microstructural development of Y-Sm alpha-SiAION system has been investigated. Besides using pre-produced rod-like alpha-SiAION seeds, growth in the glassy phase and harvested ... -
Spinel formation, reaction conditions and densification properties of magnesia-spinel composites
Aksel, Cemail (Trans Tech Publications LTD, 2004)Densification, reaction conditions and properties of densified MgO and spinel composites were examined using both pressureless sintering and hot-pressing. Initially fine (32 nm) MgO powder, either alone or blended with mum ... -
Synthesis and sintering of cordierite at low temperature from kaolin and magnesium hydroxide
Kurama, Semra; Özel, E; Ay, Nuran (Trans Tech Publications LTD, 2004)Thermal reactions of ultrafine Mg(OH)(2) mixtures of ultrafine particles and kaolin mixtures were investigated to obtain cordierite at low temperatures. Magnesium hydroxide was precipitated from magnesium chloride (MgCl2) ... -
Synthesis of nanosized tin oxide (SnO2) particles via homogeneous precipitation
Acarbaş, Özge; Suvacı, Ender; Doğan, Aydın (Trans Tech Publications LTD, 2004)Synthesis of nanosized SnO2 ceramic particles via homogeneous precipitation was investigated as a function of processing parameters such as initial concentration and calcination temperature. Hydrous tin oxide was precipitated ...