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Toplam kayıt 71, listelenen: 55-71
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Optimization and improvement of sialon ceramics with new heat treatment techniques
(1997)Sialons are of interest for use as engineering materials for high temperature (>1000°C) applications becuase they retain good mechanical properties at these temperatures, whereas competing metallic materials are weak and ... -
Phase development of barium titanate from chemically modified-amorphous titanium (hydrous) oxide precursor
(Elsevier Sci LTD, 2002)A synthesis procedure for barium titanate involving a chemically modified titanium precursor has been developed. Using a titanium isopropoxide precursor modified with acetylacetone and barium acetate, coprecipitated gels ... -
Preparation of Ce and Nd beta-sialon ceramics by alpha ->beta sialon transformation
(Inst Materials, 1997)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 ... -
Preparation of multiple-cation ?-SiAlON ceramics containing lanthanum
(1999)Until recently, it was accepted that Ce 3+ cations, with an ionic radius (r) of 1.03 Å, were too large to form an ?-SiAlON structure. However, more-recent studies have shown that cerium cations can be incorporated into ... -
Preparation of multiple-cation alpha-SiAlON ceramics containing lanthanum
(Amer Ceramic Soc, 1999)Until recently, it was accepted that Ce3+ cations, with an ionic radius (r) of 1.03 Angstrom, were too large to form an alpha-SiAlON structure. However, more-recent studies have shown that cerium cations can be incorporated ... -
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 ... -
Seramik sanayii hızlı pişirim fırınlarda kullanılan rulo malzemesi müllitin üretimi ve mekanik özelliklerinin belirlenmesi
(1999)Bu çalışmada, $\alpha-Al_2O_3$ ve kaolin kullanılarak, müllit $(3Al_2O_3. 2SİO_2)$ matriks elde edilmiş ve bu malzemenin seramik hızlı pişirim fırınlarının bir yapı elemanı olan döner rulo malzemesi yerine kullanılabilme ... -
Seramik sanayii hızlı pişirim fırınlarda kullanılanan rulo malzemesi müllitin üretimi ve mekanik özelliklerinin belirlenmesi
(Scientific and Technical Research Council of Turkey, Ankara, Turkey, 1999)A mullite matrix ceramic was developed for use as the roller material in fast fire kilns. Samples of the mullite ceramic were produced from mixtures of domestic ?-Al2O3 and kaolin clay through conventional methods of ceramic ... -
Solid-state ceramic actuator designs
(Amer Inst Aeronaut Astronaut, 2001)Smart electromeehanical systems consist mainly of sensors, actuators, and data processing units. Actuators are the responding units of many smart systems including those for active vibration control and noise control. ... -
Structural analysis of bio-oils from fixed-bed pyrolysis of Euphorbia rigida and sunflower pressed bagasse
(Taylor & Francis Inc, 2000)Fixed-bed tars of Euphorbia rigida and sunflower pressed bagasse have been investigated for their structures. These mrs were fractionated into pentane-soluble and -insoluble compounds (asphaltenes). Pentane soluble were ... -
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 ... -
Thermal stability of rare earth densified ?-sialon ceramics
(1997)Typical ?-sialon and mixed ?-ß sialon starting compositions were densified by either hot pressing or pressureless sintering using the oxides of Yb, Dy, Sm and Nd. The resulting materials were heat-treated at 1450°C for up ... -
An ultrasonic motor using a metal-ceramic composite actuator generating torsional displacement
(Japan J Applied Physics, 1998)An ultrasonic motor composed of three components; a stator, a rotor and a ball bearing is proposed. The stator is made of an active piezoelectric ring, poled in the thickness direction and bonded with two windmill-like ... -
Use of perlite in wall tile production
(Amer Ceramic Soc, 1999)Raw perlite was added to monoporous tile bodies in different proportions. Their mechanical, physical and thermal characteristics were compared to ones having no perlite. Adding perlite to wall tile bodies offers both weight ... -
The use of waste ceramic tile in cement production
(Pergamon-Elsevier Science LTD, 2000)In ceramic tile production, because of various reasons, unsold fired products come out. These are waste tiles and only a little part of them are used. Remainings create environmental problems. If these waste tiles are used ... -
?ݧ Sialon Transformation in Calcium-containing ? -SiAlON Ceramics
(1999)Recent studies on rare earth densified ?-sialon ceramics have shown that the resulting ?-sialon product, present either as a single phase or in conjunction with ß-sialon, is unstable when heat treated at lower (1350-1600°C) ...