In situ synthesis of Mn3O4/graphene nanocomposite and its application as a lubrication additive at high temperatures

2021 ◽  
Vol 546 ◽  
pp. 149019
Author(s):  
Bao Jin ◽  
Jun Zhao ◽  
Guangyan Chen ◽  
Yongyong He ◽  
Yiyao Huang ◽  
...  
Keyword(s):  
High Temperatures ◽  
In Situ Synthesis ◽  
Graphene Nanocomposite ◽  
Lubrication Additive

In situ synthesis of hierarchical In2S3–graphene nanocomposite photocatalyst for selective oxidation

RSC Advances ◽  
2014 ◽  
Vol 4 (110) ◽  
pp. 64484-64493 ◽  
Author(s):  
Xiuzhen Li ◽  
Bo Weng ◽  
Nan Zhang ◽  
Yi-Jun Xu
Keyword(s):  
Selective Oxidation ◽  
In Situ Synthesis ◽  
Graphene Nanocomposite

In-Situ Synthesis of Particle Dispersed Nanocrystalline NiAl By Cryomilling

1992 ◽  
Vol 273 ◽  
Author(s):  
Benlih Huang ◽  
J. Vallone ◽  
C. F. Klein ◽  
M. J. Luton
Keyword(s):  
Solid Solution ◽  
Crystallite Size ◽  
Liquid Nitrogen ◽  
High Temperatures ◽  
Room Temperature ◽  
In Situ Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Milling Medium

ABSTRACTThe present research was carried out to study the cryogenic synthesis NiAl from elemental powders with the view of forming particle dispersed NiAl. It was found that nanocrystalline NiAl with a crystallite size in the range 5nm to 10nm is produced during cryomilling. Additionally, the nanocrystalline NiAl maintains the fine crystallite size when annealed at high temperatures. It is thought that the resistance of the microstructure to coarsening is due to the presence of nano-scale particles of AIN formed by reaction between milling medium, liquid nitrogen, and aluminum. The transformation of Ni and Al to ordered NiAl was studied using x-ray diffraction. This showed that cryomilling not only produces a solid solution but also can induce in-situ ordering of stoichiometric NiAl. The B2 NiAl structure forms during milling after the elemental powder blend is cryomilled for about 40 hours. It also forms when the “mechanical” solid solution is annealed at room temperature for about twelve hours.

In situ synthesis of SnO2/graphene nanocomposite and their application as anode material for lithium ion battery

2010 ◽  
Vol 64 (19) ◽  
pp. 2076-2079 ◽  
Author(s):  
Zhifeng Du ◽  
Xiaoming Yin ◽  
Ming Zhang ◽  
Quanyi Hao ◽  
Yanguo Wang ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Anode Material ◽  
Lithium Ion ◽  
In Situ Synthesis ◽  
Graphene Nanocomposite

scholarly journals Searching for a route to synthesize in situ epitaxial Pr2Ir2O7 thin films with thermodynamic methods

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Lu Guo ◽  
Shun-Li Shang ◽  
Neil Campbell ◽  
Paul G. Evans ◽  
Mark Rzchowski ◽  
...  
Keyword(s):  
Thin Films ◽  
High Temperatures ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Chemical Vapor ◽  
High Growth ◽  
In Situ Synthesis ◽  
Key Species ◽  
High Partial Pressure

AbstractIn situ growth of pyrochlore iridate thin films has been a long-standing challenge due to the low reactivity of Ir at low temperatures and the vaporization of volatile gas species such as IrO3(g) and IrO2(g) at high temperatures and high PO2. To address this challenge, we combine thermodynamic analysis of the Pr-Ir-O2 system with experimental results from the conventional physical vapor deposition (PVD) technique of co-sputtering. Our results indicate that only high growth temperatures yield films with crystallinity sufficient for utilizing and tailoring the desired topological electronic properties and the in situ synthesis of Pr2Ir2O7 thin films is fettered by the inability to grow with PO2 on the order of 10 Torr at high temperatures, a limitation inherent to the PVD process. Thus, we suggest techniques capable of supplying high partial pressure of key species during deposition, in particular chemical vapor deposition (CVD), as a route to synthesis of Pr2Ir2O7.

scholarly journals In situ synthesis of silver/chemically reduced graphene nanocomposite and its use for low temperature conductive paste

2017 ◽  
Vol 28 (11) ◽  
pp. 7686-7691 ◽  
Author(s):  
Bin Feng ◽  
Xiaolong Gu ◽  
Xinbing Zhao ◽  
Yu Zhang ◽  
Tianyu Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
In Situ Synthesis ◽  
Reduced Graphene ◽  
Graphene Nanocomposite

In situ REM imaging of surface processes on ceramic bulk crystals from 300 to 1670 K in a conventional TEM

1991 ◽  
Vol 49 ◽  
pp. 660-661
Author(s):  
Z. L. Wang ◽  
J. Bentley
Keyword(s):  
High Temperatures ◽  
Image Resolution ◽  
Atomic Processes ◽  
Crystal Surfaces ◽  
Beam Radiation ◽  
Surface Areas ◽  
Transmission Electron ◽  
Reflection Electron Microscopy ◽  
Gas Reactions

Studying the behavior of surfaces at high temperatures is of great importance for understanding the properties of ceramics and associated surface-gas reactions. Atomic processes occurring on bulk crystal surfaces at high temperatures can be recorded by reflection electron microscopy (REM) in a conventional transmission electron microscope (TEM) with relatively high resolution, because REM is especially sensitive to atomic-height steps.Improved REM image resolution with a FEG: Cleaved surfaces of a-alumina (012) exhibit atomic flatness with steps of height about 5 Å, determined by reference to a screw (or near screw) dislocation with a presumed Burgers vector of b = (1/3)<012> (see Fig. 1). Steps of heights less than about 0.8 Å can be clearly resolved only with a field emission gun (FEG) (Fig. 2). The small steps are formed by the surface oscillating between the closely packed O and Al stacking layers. The bands of dark contrast (Fig. 2b) are the result of beam radiation damage to surface areas initially terminated with O ions.

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