ChemInform Abstract: Topochemical Manipulation of Perovskites: Low-Temperature Reaction Strategies for Directing Structure and Properties

ChemInform ◽  
2011 ◽  
Vol 42 (15) ◽  
pp. no-no
Author(s):  
K. G. Sanjaya Ranmohotti ◽  
Elisha Josepha ◽  
Jonglak Choi ◽  
Jianxia Zhang ◽  
John B. Wiley
Keyword(s):  
Low Temperature ◽  
Temperature Reaction ◽  
Structure And Properties

Topochemical Manipulation of Perovskites: Low-Temperature Reaction Strategies for Directing Structure and Properties

2011 ◽  
Vol 23 (4) ◽  
pp. 442-460 ◽  
Author(s):  
K. G. Sanjaya Ranmohotti ◽  
Elisha Josepha ◽  
Jonglak Choi ◽  
Jianxia Zhang ◽  
John B. Wiley
Keyword(s):  
Low Temperature ◽  
Temperature Reaction ◽  
Structure And Properties

Influence of low-temperature tempering on structure and properties of welded joints of high-strength steel 30Kh2N2MF

2020 ◽  
Vol 2020 (6) ◽  
pp. 20-26
Author(s):  
O.A. Gaivoronskyi ◽  
◽  
V.D. Poznyakov ◽  
O.M. Berdnikova ◽  
T.O. Alekseenko ◽  
...  
Keyword(s):  
Low Temperature ◽  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Structure And Properties

Investigation on structure and properties of nitride-tin-boron-fluorophosphate glass for low-temperature sealing

2021 ◽  
Vol 557 ◽  
pp. 120504
Author(s):  
Dongwei Zhang ◽  
Xin Xu ◽  
Tianlai Yu ◽  
Dahong Mo ◽  
Jinlong Diao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Structure And Properties ◽  
Fluorophosphate Glass

Study of high-pressure air jet controlled compression ignition with compound thermodynamic cycle for combustion and emission formation process

2020 ◽  
pp. 146808742096933
Author(s):  
Xiangyu Meng ◽  
Sicheng Liu ◽  
Jingchen Cui ◽  
Jiangping Tian ◽  
Wuqiang Long ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Low Temperature ◽  
Formation Process ◽  
Combustion Process ◽  
Thermodynamic Cycle ◽  
Compression Ignition ◽  
Temperature Reaction ◽  
Air Jet ◽  
High Temperature Reaction

A novel method called high-pressure air (HPA) jet controlled compression ignition (JCCI) based on the compound thermodynamic cycle was investigated in this work. The combustion process of premixed mixture can be controlled flexibly by the high-pressure air jet compression, and it characterizes the intensified low-temperature reaction and two-stage high-temperature reaction. The three-dimensional (3D) computational fluid dynamics (CFD) numerical simulation was employed to study the emission formation process and mechanism, and the effects of high-pressure air jet temperature and duration on emissions were also investigated. The simulation results showed that the NOx formation is mainly affected by the first-stage high-temperature reaction due to the higher reaction temperature. Overall, this combustion mode can obtain ultra-low NOx emission. The second-stage high-temperature reaction plays an important role in the CO and THC formation caused by the mixing effect of the high-pressure air and original in-cylinder mixture. The increasing air jet temperature leads to a larger high-temperature in-cylinder region and more fuel in the first-stage reaction, and therefore resulting in higher NOx emission. However, the increasing air jet temperature can significantly reduce the CO and THC emissions. For the air jet duration comparisons, both too short and too long air jet durations could induce higher NOx emission. A higher air jet duration would result in higher CO emission due to the more high-pressure air jet with relatively low temperature.

Structure and properties of UHMWPE products strengthened and toughened by pulse vibration molding at low temperature

Polymer ◽  
2021 ◽  
pp. 124026
Author(s):  
Songxi Hu ◽  
Yanhong Feng ◽  
Xiaochun Yin ◽  
Xinliang Zou ◽  
Jinping Qu
Keyword(s):  
Low Temperature ◽  
Structure And Properties

Study of superconducting HgBa2CuO4+x from a one step low temperature reaction

1994 ◽  
Vol 89 (5) ◽  
pp. 425-427 ◽  
Author(s):  
Adly H. El Sayed ◽  
V. Calzona ◽  
M.R. Cimberle ◽  
R. Eggenhoffner ◽  
C. Ferdeghini ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Reaction ◽  
One Step

Preparation of Graphene Nanosheet/Alumina Composites

2013 ◽  
Vol 745-746 ◽  
pp. 534-538 ◽  
Author(s):  
Xia Liu ◽  
Yu Chi Fan ◽  
Qian Feng ◽  
Lian Jun Wang ◽  
Wan Jiang
Keyword(s):  
Low Temperature ◽  
Composite Powder ◽  
Expanded Graphite ◽  
Structure And Properties ◽  
Composite Powders ◽  
Graphene Nanosheet ◽  
Residual Solvent ◽  
Grain Sizes ◽  
Alumina Composites ◽  
Mixed Gases

Graphene nanosheet (GNS)/ Al2O3 composite powder with homogeneously distributed GNSs has been fabricated from wet ball milled expanded graphite and Al2O3, and then followed by the rotary evaporator at relatively low temperature to dry the mixture and the residual solvent was removed in atmosphere-vacuum pipe-type furnace accessing mixed gases of Argon and Hydrogen at 600 for 6h. During the process, homogeneously dispersed and mixed GNS/ Al2O3 composite powders with quite few damage of GNSs structure and properties have been obtained. The microstructures and grain sizes of GNS/ Al2O3 composite powders have been investigated. The results showed that the addition of GNSs had diminished the size of Al2O3 particles and also the as-prepared GNSs/ Al2O3 composite powders can be dispersed and mixed more homogeneously remarkably with the presence of GNSs.

scholarly journals Low temperature reaction dynamics for CH3OH + OH collisions on a new full dimensional potential energy surface

2018 ◽  
Vol 20 (40) ◽  
pp. 25951-25958 ◽  
Author(s):  
Octavio Roncero ◽  
Alexandre Zanchet ◽  
Alfredo Aguado
Keyword(s):  
Low Temperature ◽  
Potential Energy ◽  
Potential Energy Surface ◽  
Low Temperatures ◽  
Organic Molecules ◽  
Energy Surface ◽  
Reaction Dynamics ◽  
Buffer Gas ◽  
Temperature Reaction ◽  
Formation Of Complexes

Is the rise of the rate constant measured in laval expansion experiments of OH with organic molecules at low temperatures due to the reaction between the reactants or due to the formation of complexes with the buffer gas?

scholarly journals NEW TECHNOLOGY FOR HARDENING READY-MADE TOOLS IN AQUAEOUS DISPERSED MEDIA

2017 ◽  
Vol 23 (1) ◽  
pp. 87
Author(s):  
Alexander A. Shmatov ◽  
Ľubomír Šooš ◽  
Zdenko Krajný
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Solid Lubricant ◽  
New Technology ◽  
Aqueous Media ◽  
Hard Alloys ◽  
Refractory Materials ◽  
Structure And Properties ◽  
Refractory Compounds ◽  
Low Temperature Process

<p class="AMSmaintext"><span lang="EN-US">The new method for hardening ready-made steels, hard alloys and diamond tools is developed: low-temperature process for producing thin-film solid lubricant coatings by hydro chemical treatment in specially prepared aqueous media of nanosized hard refractory compounds and subsequent tempering. The main advantages of the method over known processes are presented. The principles for dispersion of refractory materials are formulated. The structure and properties of the obtained coatings are examined. <br /></span></p>

scholarly journals Synthesis of new Ln4(Al2O6F2)O2 (Ln = Sm, Eu, Gd) phases with a cuspidine-related structure

IUCrJ ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 128-135 ◽  
Author(s):  
Aroa Morán-Ruiz ◽  
Aritza Wain-Martin ◽  
Alodia Orera ◽  
María Luisa Sanjuán ◽  
Aitor Larrañaga ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Raman Spectra ◽  
Photoelectron Spectroscopy ◽  
Binding Energies ◽  
Temperature Reaction ◽  
Rietveld Refinements ◽  
X Ray ◽  
Vinylidene Difluoride ◽  
Vacant Position

The first fluorination of the cuspidine-related phases of Ln4(Al2O7□)O2 (where Ln = Sm, Eu, Gd) is reported. A low-temperature reaction with poly(vinylidene difluoride) lead to the fluorine being substituted in place of oxygen and inserted into the vacant position between the dialuminate groups. X-ray photoelectron spectroscopy shows the presence of the F 1s photoelectron together with an increase in Al 2p and rare-earth 4d binding energies supporting F incorporation. Energy-dispersive X-ray spectroscopy analyses are consistent with the formula Ln4(Al2O6F2)O2, confirming that substitution of one oxygen by two fluoride atoms has been achieved. Rietveld refinements show an expansion in the cell upon fluorination and confirm that the incorporation of fluoride in the Ln4(Al2O7□)O2 structure results in changes in Al coordination from four to five. Thus, the isolated tetrahedral dialuminate Al2O7 groups are converted to chains of distorted square-based pyramids. These structural results are also discussed based on Raman spectra.

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