scholarly journals Degradation of one-side fully-chlorinated 1,2,3,4-tetrachloronaphthalene over Fe–Al composite oxides and its hypothesized reaction mechanism

RSC Advances ◽  
2017 ◽  
Vol 7 (29) ◽  
pp. 17577-17585 ◽  
Author(s):  
Yalu Liu ◽  
Huijie Lu ◽  
Wenxiao Pan ◽  
Qianqian Li ◽  
Guijin Su ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Composite Oxides ◽  
Al Composite

Generated PeCNs to MoCNs congeners during the degradation of CN-27 over Fe–Al mixed composite oxides suggest the occurrence of successive hydrodechlorination and side chlorination pathways.

Deeper insight on the lithium reaction mechanism with amorphous tin composite oxides

2004 ◽  
Vol 6 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Jerôme Chouvin ◽  
Carlos Pérez Vicente ◽  
Josette Olivier-Fourcade ◽  
Jean-Claude Jumas ◽  
Bernard Simon ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Composite Oxides

scholarly journals Particle Shape Control of Zn-Al Composite Oxides by Using Composite Hydroxides as a Precursor

2020 ◽  
Vol 67 (2) ◽  
pp. 73-79
Author(s):  
Kohei YAMAZAKI ◽  
Mitsuaki MATSUOKA ◽  
Norihiro MURAYAMA
Keyword(s):  
Particle Shape ◽  
Shape Control ◽  
Composite Oxides ◽  
Al Composite

Microstructure and Reaction Mechanism of Multi-Laminated Ti-(SiCp/Al) Composites Subjected to Annealing at 1300°C

2013 ◽  
Vol 762 ◽  
pp. 526-530
Author(s):  
Jin Cheng Pang ◽  
Lin Geng ◽  
G.H. Fan ◽  
A.B. Li ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Reaction Mechanism ◽  
Scanning Electron Microscope ◽  
Reaction Model ◽  
Hot Press ◽  
Roll Bonding ◽  
X Ray ◽  
Al Composite ◽  
Reaction Annealing ◽  
Scanning Electron

The multi-laminated Ti-(SiCp/Al) composite was produced by hot press and subsequent hot roll bonding of Ti and SiCp/Al foils. The microstructure evolution of the composite in reaction annealing was investigated by scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometer (EDX) and X-ray diffractometer (XRD). The results show that after the reaction annealing at 1300°C for 3h, the Ti and SiCp/Al foils were completely consumed and transformed into the TiAl composite with a microlaminated structure. The microlaminated microstructure of the composite is composed of Ti3Al/(TiAl+Ti5Si3p)/Ti5Si3/duplex-phase (TiC+Ti3AlC) layers. The reaction mechanism is elucidated by employing the reaction model.

Synthesis of Al2O3/AlB12/Al Composite Ceramic Powders by Pulsed Nd:YAG Laser Igniting Method and a Study of their Mechanical Properties

2010 ◽  
Vol 26-28 ◽  
pp. 919-924
Author(s):  
Kai Jin Huang
Keyword(s):  
Fracture Toughness ◽  
Reaction Mechanism ◽  
Nd:Yag Laser ◽  
Bending Strength ◽  
Composite Ceramic ◽  
Composite Ceramics ◽  
Ceramic Powders ◽  
Pulsed Nd:Yag Laser ◽  
Al Composite ◽  
Pure Al2o3

Based on the combined toughening principle, pure Al2O3/AlB12/Al composite ceramic powders have been synthesized using pulsed Nd:YAG laser igniting method. This method starts from Al and B2O3 powder mixtures, after which Al2O3/AlB12/AlN composite ceramics were fabricated by hot-press sintering at 1600°C for 2h under the protection of a N2 atmosphere. XRD and SEM techniques were used to characterize the phases and morphologies of the powders and the ceramics. The bending strength and the fracture toughness of the ceramics were measured by the three-point bending method and the indentation fracture method, respectively. The results show that the pure Al2O3/AlB12/Al composite ceramic powders can be successfully synthesized by pulsed Nd:YAG laser igniting method because the adiabatic temperature of Al-B2O3 system is more than 1800K. Al2O3 and AlB12 phases were formed by the liquid-liquid reaction mechanism and the liquid-solid reaction mechanism, respectively. The bending strength and the fracture toughness of the Al2O3/AlB12/AlN composite ceramics were 525.86MPa and 5.68MPa.m1/2, respectively. These values are 50.25% and 42% greater than those of the pure Al2O3 ceramic (350MPa and 4MPa.m1/2) due to the reinforcing and toughening in-situ formation of small AlN particles.

scholarly journals Synthesis of Ordered Mesoporous Zr-Al Composite Oxides with Excellent Structural and Textural Properties and Extremely High Stability

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3036
Author(s):  
Feng Yu ◽  
Shinan Bi ◽  
Tonghui Liu ◽  
Dahai Pan ◽  
Shuwei Chen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Textural Properties ◽  
Atomic Ratio ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Composite Oxides ◽  
Al Composite ◽  
Ordered Mesoporous ◽  
Assembly Procedure ◽  
Hydrolysis Of

Ordered mesoporous Zr-Al composite oxide materials (denoted as OMZA-x) with different Zr contents have been synthesized by a solvent evaporation-inducing self-assembly procedure associated with a thermal treatment at 100 °C. A cooperative co-assembly process of amphiphilic triblock copolymer F127 molecules and inorganic hydroxyl species originated from the hydrolysis of Zr and Al precursors was proposed to explain the synthesis of OMZA-x. Compared to ordered mesoporous alumina prepared without introducing Zr species, the resultant OMZA-x exhibited a much more ordered mesostructure combined with a distinct increase in the pore volume and specific surface area. The highly homogenous doping of Zr into the mesopore walls together with the formation of Zr-O-Al bonds can effectively enhance the thermal and hydrothermal stability of OMZA-x. For instance, the ordered mesostructure and excellent textural properties of OMZA-6 prepared with the optimum atomic ratio of Al to Zr of 6 could be well maintained even after a high-temperature treatment at 1000 °C for 1 h or a hydrothermal treatment at 100 °C for 6 h.

Template-free synthesis of wormhole-like mesoporous Ni–Al composite oxides and catalytic application for steam reforming of benzene

2015 ◽  
Vol 22 (5) ◽  
pp. 1153-1160 ◽  
Author(s):  
Xingfu Shang ◽  
Xueguang Wang ◽  
Xiujing Zou ◽  
Xionggang Lu ◽  
Weizhong Ding
Keyword(s):  
Steam Reforming ◽  
Catalytic Application ◽  
Composite Oxides ◽  
Al Composite ◽  
Template Free

Enhanced removal of fluoride and arsenate ions from aqueous solution by magnetic Mg–Al composite oxides (Fe3O4@Mg–Al–O)

2019 ◽  
Vol 49 (11) ◽  
pp. 385-394
Author(s):  
Wenqing Ma ◽  
Wei Zhang ◽  
Yuantao Chen ◽  
Yunsheng Wang ◽  
Fang Yu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Composite Oxides ◽  
Al Composite

Synthesis of Al2O3/AlB12/Al Composite Ceramic Powders by a New Laser-Induction Complex Heating Method and a Study of their Mechanical Properties

2010 ◽  
Vol 29-32 ◽  
pp. 596-601
Author(s):  
Kai Jin Huang ◽  
Li Yan ◽  
Hua Min Kou ◽  
Chang Sheng Xie
Keyword(s):  
Fracture Toughness ◽  
Reaction Mechanism ◽  
Bending Strength ◽  
Composite Ceramic ◽  
Composite Ceramics ◽  
Ceramic Powders ◽  
Heating Method ◽  
Al Composite ◽  
Laser Induction ◽  
Pure Al2o3

Based on the combined toughening principle, pure Al2O3/AlB12/Al composite ceramic powders have been synthesized using a new laser-induction complex heating method. This method starts from Al and B2O3 powder mixtures, after which Al2O3/AlB12/AlN composite ceramics were fabricated by hot-press sintering at 1600°C for 2h under the protection of a N2 atmosphere. XRD and SEM techniques were used to characterize the phases and morphologies of the powders and the ceramics. The bending strength and the fracture toughness of the ceramics were measured by the three-point bending method and the indentation fracture method, respectively. The results show that the pure Al2O3/AlB12/Al composite ceramic powders can be successfully synthesized by this new laser-induction complex heating method because the adiabatic temperature of Al-B2O3 system is more than 1800K. Al2O3 and AlB12 phases were formed by the liquid-liquid reaction mechanism and the liquid-solid reaction mechanism, respectively. The bending strength and the fracture toughness of the Al2O3/AlB12/AlN composite ceramics were 551.44MPa and 6.04MPa.m1/2, respectively. These values are 57.55% and 51% greater than those of the pure Al2O3 ceramic (350MPa and 4MPa.m1/2) due to the reinforcing and toughening in-situ formation of small AlN particles.

Synthesis of ordered macro-mesoporous Mg-Al composite oxides with high thermal stability and mechanical strength

2018 ◽  
Vol 224 ◽  
pp. 33-36 ◽  
Author(s):  
Dahai Pan ◽  
Wei Chen ◽  
Feng Yu ◽  
Shuwei Chen ◽  
Xiaoliang Yan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Strength ◽  
High Thermal Stability ◽  
Composite Oxides ◽  
Al Composite
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