Gas sensing behaviour of cerium oxide and magnesium
· A small-sized gas sensor with a low operating temperature semiconductor is designed to meet the recent demands of gas sensors 1 2 .In general a semiconductor gas sensor shows good sensitivity stability and selectivity in gas detection .The semiconductor metal oxides such as tin oxide titanium oxide cerium oxide ((hbox CeO _ 2 )) zinc oxide zirconium oxide and tungsten oxide are
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Emissivity of spinel and titanate structures aiming at the
· Table 1 presents five different compounds which were produced in this work with the purpose of analyzing the effects of different doping mechanisms on the emissivity values. S1 is a regular magnesium-aluminate spinel (MgAl 2 O 428 wt. of MgO and 72 wt. of Al 2 O 3) and based on this reference S2 and S3 were designed by adding different doping agents carefully selected in order to
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(PDF) Modification of the physical properties of
The electrical resistivity shows that the synthesized materials behave as semiconductors. The Co-Zn doped particles have higher resistivity than the pure magnesium aluminate.Fig. 1 .1XRD pattern of MgAl 2 O 4 spinel ICSD reference code with respective 2u values and h k
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Challenges and Opportunities for Spark Plasma Sintering A
· Magnesium aluminate spinel The densification to transparency (50 at 550 nm) by SPS of a fine-grained high-purity spinel was successfully demonstrated Morita et al. 2008 . The temperature used in that study was 1300 °C with a holding time of 20 minutes and a low heating rate 10 °C min -1 .
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Papersrefractories-worldforum
· Improved Thermal Shock Resistance of Magnesium Aluminate Spinel Ceramics by Aluminium Titanate Additions. Kirsten Moritz Christos G. Aneziris. Volume 8 Issue 2 Pages 6773. Keywords magnesium aluminate spinel aluminum titanate thermal shock resistance dynamic Young s modulus. Abstract References Full Article
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REFRACTORY 96 Proceedings of the International
· 13. Effects of Technological Conditions on the Density of Synthetic Magnesium Aluminate Spinel Clinker 477 Dai Xiaoguang Yang Xiwen Tian Xuequang Wang Houzhi Section IV Fundamental and Technological Studies 1. Role of O -Sialon with and without Other Additives on Oxidation Resistance of 485 MgO-C Refractories (Invited) Michel Rigaud Weibin
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(PDF) Modification of the physical properties of
The electrical resistivity shows that the synthesized materials behave as semiconductors. The Co-Zn doped particles have higher resistivity than the pure magnesium aluminate.Fig. 1 .1XRD pattern of MgAl 2 O 4 spinel ICSD reference code with respective 2u values and h k
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USAMagnesium aluminate spinel bond for
A magnesium aluminate spinel-bonded refractory can be formed which does not exhibit undue expansion (due to the reaction of magnesia and alumina to form magnesium aluminate spinel) between the raw compacted state and the fired ceramically bonded state when fired to a temperature of 1400° C if a very finely divided alumina with dense particles is used.
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Corrosion of basic refactories in non-ferrous converters
Our studies concluded that the spinel phases either as magnesium chromate magnesium aluminate or complex spinel (Mg Fe) (Cr Al Fe)₂O₄ enhanced the corrosion resistance of a basic refractory to fayalite type slags from the non-ferrous smelting and converting furnaces. Attribution-NonCommercial-NoDerivatives 4.0 International.
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IOP Conference Series Materials Science and Engineering
For the magnesium aluminate spinel micrometre powders synthesized by the solid phase reaction method the phases are mainly spinel with a little of periclase and corundum phase. The sinterability of powders prepared by chemical co-precipitation method is the best but that of powders synthesized by low temperature combustion and solid phase
Get PriceREFRACTORY 96 Proceedings of the International
· 13. Effects of Technological Conditions on the Density of Synthetic Magnesium Aluminate Spinel Clinker 477 Dai Xiaoguang Yang Xiwen Tian Xuequang Wang Houzhi Section IV Fundamental and Technological Studies 1. Role of O -Sialon with and without Other Additives on Oxidation Resistance of 485 MgO-C Refractories (Invited) Michel Rigaud Weibin
Get PriceAluminum Magnesium Spinel CastableRongsheng Refractory
· Aluminum magnesium spinel castable as a kind of hot sales refractory castable for furnace application in Rongsheng factory manufacturing with mainly used to glass kiln bottom cement kiln front and rear kiln door cover cooler front end and other high temperature resistant parts front and rear kiln mouth coal injection pipe heating furnace soaking furnace and other heat treatment furnace
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PREPARATION OF MAGNESIUM OXIDE REFRACTORIES. Final
· Magnesium oxide was fabricated by hand tamping mechanical vibration dry pressing extrusion hot pressing and slip casting. The dry forrning was done with and without a binder. Slip casting was accomplished from both alcohol and water slurries. Magnesia ware was fired under a
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High Alumina Refractory Ball Zhengzhou YuXin Kiln
Refractory balls alumina ceramic ball application in chemical fertilizer plant of high and low temperature transformation furnace reformer hydrogenation desulfurization tank and methanation furnace dispersed liquid and supporting covering and protecting catalyst role can also be used in heating furnace of iron and steel industry and the
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Crack-resistant insulating dry refractoryAllied Mineral
1. A dry refractory composition comprising a dry refractory mixture including a matrix material having a particle size less than 100 mesh in an amount from 15 to 50 volume percent the matrix material being selected from calcined alumina fused alumina sintered magnesia fused magnesia silica fume fused silica silicon carbide boron carbide titanium diboride zirconium boride boron
Get PriceSynthesis and Characterization of Transition Metal doped
· The magnesium aluminate spinel belongs to normal spinels its formula is (Mg2 ) Al 2 from insulating to low resistive semiconductor behavior. The magnetic properties of the solid solutions are followed by a further heating at 150 °C to yield a gel. The resulting gel was pulverized and calcined at °C for 2 h.
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Emissivity of spinel and titanate structures aiming at the
· Table 1 presents five different compounds which were produced in this work with the purpose of analyzing the effects of different doping mechanisms on the emissivity values. S1 is a regular magnesium-aluminate spinel (MgAl 2 O 428 wt. of MgO and 72 wt. of Al 2 O 3) and based on this reference S2 and S3 were designed by adding different doping agents carefully selected in order to
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Prediction of structure and cation ordering in an ordered
· Spinel compounds—typically represented as AB 2 O 4 with A and B as metal ions—form an important class of materials 1 2 3 4 5.Spinels are found as naturally occurring minerals all over the
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Magnesia BricksRongsheng Kiln Refractory
· Applications of Rongsheng Refractory Magnesia Bricks 1.Iron Steel Industry steelmaking furnace lining ferroalloy furnace metal mixer furnace lining converter lining arc furnace wall and furnace bottom soaking furnace heating furnace bottom 2.Non-ferrous metallurgical industry
Get PriceMagnesia BricksRongsheng Kiln Refractory
· Applications of Rongsheng Refractory Magnesia Bricks 1.Iron Steel Industry steelmaking furnace lining ferroalloy furnace metal mixer furnace lining converter lining arc furnace wall and furnace bottom soaking furnace heating furnace bottom 2.Non-ferrous metallurgical industry
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Papersrefractories-worldforum
· Improved Thermal Shock Resistance of Magnesium Aluminate Spinel Ceramics by Aluminium Titanate Additions. Kirsten Moritz Christos G. Aneziris. Volume 8 Issue 2 Pages 6773. Keywords magnesium aluminate spinel aluminum titanate thermal shock resistance dynamic Young s modulus. Abstract References Full Article
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IOP Conference Series Materials Science and Engineering
For the magnesium aluminate spinel micrometre powders synthesized by the solid phase reaction method the phases are mainly spinel with a little of periclase and corundum phase. The sinterability of powders prepared by chemical co-precipitation method is the best but that of powders synthesized by low temperature combustion and solid phase
Get Price
Emissivity of spinel and titanate structures aiming at the
· S1 is a regular magnesium-aluminate spinel (MgAl 2 O 428 wt. of MgO and 72 wt. of Al 2 O 3) and based on this reference S2 and S3 were designed by adding different doping agents carefully selected in order to maximize the lattice parameter distortion and optimize the electronic transition of their valence layers.
Get PriceUSAMagnesium aluminate spinel bond for
A magnesium aluminate spinel-bonded refractory can be formed which does not exhibit undue expansion (due to the reaction of magnesia and alumina to form magnesium aluminate spinel) between the raw compacted state and the fired ceramically bonded state when fired to a temperature of 1400° C if a very finely divided alumina with dense particles is used.
Get Price
Gas sensing behaviour of cerium oxide and magnesium
· A small-sized gas sensor with a low operating temperature semiconductor is designed to meet the recent demands of gas sensors 1 2 .In general a semiconductor gas sensor shows good sensitivity stability and selectivity in gas detection .The semiconductor metal oxides such as tin oxide titanium oxide cerium oxide ((hbox CeO _ 2 )) zinc oxide zirconium oxide and tungsten oxide are
Get Price
Synthesis and Characterization of Transition Metal doped
· The magnesium aluminate spinel belongs to normal spinels its formula is (Mg2 ) Al 2 from insulating to low resistive semiconductor behavior. The magnetic properties of the solid solutions are followed by a further heating at 150 °C to yield a gel. The resulting gel was pulverized and calcined at °C for 2 h.
Get PricePapersrefractories-worldforum
· Improved Thermal Shock Resistance of Magnesium Aluminate Spinel Ceramics by Aluminium Titanate Additions. Kirsten Moritz Christos G. Aneziris. Volume 8 Issue 2 Pages 6773. Keywords magnesium aluminate spinel aluminum titanate thermal shock resistance dynamic Young s modulus. Abstract References Full Article
Get PriceMagnesia BricksRongsheng Refractory
· The magnesia-hercynite brick had low thermal conductivity and long service life and its overall performance was better than magnesia-chrome brick. Feature of Rongsheng Refractory Magnesia Bricks. 1.High refractoriness usually the refractoriness is above 2000°C. 2.Refractoriness under load about °C because of poor high-temperature
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Magnesite-rich mining tailings as a raw material for
· material MgAl2O4 spinel has applications in the form of sintered ceramics or coatings e.g. for surfacing furnace parts. In particular porous MgAl2O4 spinel ceramic is used as a thermally insulating material at high tem-peratures for the steel-making industry 4 . Due to Corresponding author marjaana.karhu vtt.fi
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