Güncel Gönderiler: Fen Bilimleri Enstitüsü
Toplam kayıt 2521, listelenen: 161-180
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Reply to the discussion by J. Bensted and J. Munn of the paper "The use of waste ceramic tile in cement production"
(Pergamon-Elsevier Science LTD, 2001)… -
Effects of different Si3N4 starting powders and sintering conditions on the grain morphology and mechanical properties of alpha-SiAlON ceramics
(Trans Tech Publications LTD, 2002)Nitrogen rich yttrium-cerium containing multi-cation alpha -SiAlON starting compositions have been prepared by gas pressure sintering using "conventional" alpha -Si3N4 or alpha-beta Si3N4 containing powder. The effect of ... -
Performance of new alpha-beta SiAlONs in turning operations
(Trans Tech Publications LTD, 2002)New alpha-beta SiAlON ceramics were produced, characterised and tested in turning operations of cast iron. Cutting speeds varied between 400-1200 m/min while feeding rates were between 0.3 to 0.5 mm/rev. The results were ... -
Novel SiAlON ceramics for cutting tool applications
(Trans Tech Publications LTD, 2003)New alpha-beta SiAlON ceramics were produced in aqueous medium by Using Multiple oxides as densifying additives. The sintered materials were characterised using a combinations of techniques such as XRD, SEM and TEM. The ... -
The role of fine alumina and mullite particles on the thermomechanical behaviour of alumina-mullite refractory materials
(Elsevier Science BV, 2002)Fine grain alumina and mullite particles (approximately 5 mu-m) were incorporated into slip-cast alumina - mullite refractories in order to investigate their effects on the microstructure, mechanical properties and thermal ... -
Effect of starting Si3N4 powder type and sintering conditions on grain morphology of alpha-SiAlON ceramics
(Maney Publishing, 2002)Nitrogen rich multication alpha-SiAlON ceramics doped with Y-Ce have been densified by gas pressure sintering using alpha-Si3N4 or mixed beta/alpha-Si3N4 starting powder. The effects of alpha-SiAlON nucleation and growth ... -
Effect of different starting hemihydrate powders on the performance of gypsum moulds
(Belgian Ceramic Society, 2003)In order to determine the effect of different starting hemihydrates (Plaster of Paris) on the life of gypsum moulds, microstructure of two different Plaster of Paris and gypsum moulds made from these hemihydrates have been ... -
The preparation of Ce alpha-sialons and related unstable phases
(Iom Communications LTD, 1998)It has previously been accepted that lanthanum and cerium do not form alpha-sialon structures because their ions are too large to enter the interstices in the structure. Recent work on heat-treatment of rare-earth densified ... -
The effect of different nucleation temperatures on the grain morphology of alpha-SiAlON ceramics
(Trans Tech Publications LTD, 2003)Nitrogen rich yttrium-cerium containing multi-cation alpha-SiAlON starting compositions were prepared by gas pressure sintering using conventional alpha-Si3N4 powder. Microstructural characterization of the two stage ... -
Synthesis of an iron-chromium ceramic pigment by using limonite and chromite mixtures
(Belgian Ceramic Society, 2003)The pigments, which are important parts of ceramic industry, have been produced by a prolonged expensive process due to a necessity of using very expensive pure oxides. Therefore, it is important to produce pigments from ... -
Characterisation of biscuit fired bone china body microstructure. Part 1: XRD and SEM of crystalline phases
(Elsevier Sci LTD, 2002)As a ceramic material bone china is a highly specialised product and is the basis of the world's most attractive and expensive types of tableware, mainly due to its translucency, whiteness, bright glaze, decoration quality, ... -
Characterisation of biscuit fired bone china body microstructure. Part II: Transmission electron microscopy (TEM) of glassy matrix
(Elsevier Sci LTD, 2002)In this second part oft lie study, electron transparent specimens of the biscuit fired bone china body were prepared for a conventional transmission electron microscopy (TEM) study. The crystalline phases present in the ... -
Transmission electron microscopy studies of La2O3-doped alpha-SiAlON ceramics
(IOP Publishing LTD, 1999)alpha-SiAlON is able to accommodate cations into its crystal structure if the cations are sufficiently small in size, thus helping to reduce the volume of the remnant grain boundary phase after processing. In this study, ... -
Interactions between an ABS type leadless glaze and a biscuit fired bone china body during glost firing. Part II: investigation of interactions
(Elsevier Sci LTD, 2002)This part of the study involves the investigation of the interactions between an ABS type commercial leadless glaze and a biscuit fired bone china body during glost firing at different temperatures using XRD and SEM ... -
The effect of albite wastes on glaze properties and microstructure of soft porcelain zinc crystal glazes
(Elsevier Sci LTD, 2001)The efficient utilisation of waste materials arising from diverse industrial branches is of technological importance. As a replacement material for feldspar in some soft porcelain zinc crystal glazes, albite triage wastes ... -
Interactions between an ABS type leadless glaze and a biscuit fired bone china body during glost firing. Part I: preparation of experimental phases
(Elsevier Sci LTD, 2002)In this paper, part of an extended study, crystalline phases of a biscuit fired bone china body, namely anorthite and beta-tricalcium phosphate (beta-TCP), were produced experimentally to be used in subsequent interface ... -
Compositional modifications to floor tile glazes opacified with zircon
(I O M Communications LTD Inst Materials, 2001)In the ceramic tile industry opaque glazes with considerable zircon content are widely used. However, the high cost of zircon limits its wide use in relevant glaze compositions. In the present study, a model opaque glaze ... -
Design optimization of piezoelectric composite transducer using finite element method
(Trans Tech Publications LTD, 2002)The effect of size on the performance of the cymbal transducer was investigated by using experimental and computational methods. Cymbal transducers were fabricated with steel endcap materials and piezoelectric ceramic, ... -
The development and characterisation of zinc crystal glazes used for Amakusa-like soft porcelains
(Elsevier Sci LTD, 2000)In porcelain production, as well as bodies expected to have white colour, compaction and translucency, suitable glaze compositions have great importance from both a technological and decoration point of view. Supplying the ... -
Hydrated aluminium sulfate precipitation by enzyme-catalysed urea decomposition
(Elsevier Sci LTD, 2000)Hydrated basic aluminium hydroxide precipitates were obtained from aluminium sulphate solution at room temperature and at 92 degrees C by using urea. Enzyme urease was used to decompose urea at room temperature. It was ...
