Chloride Reduction of Mn3+ in Mild Hydrothermal Synthesis of a Charge Ordered Defect Pyrochlore, CsMn2+Mn3+F6, a Canted Antiferromagnet with a Hard Ferromagnetic Component

2021 ◽  
Author(s):  
Vladislav V. Klepov ◽  
Kristen A. Pace ◽  
Anna A. Berseneva ◽  
Justin B. Felder ◽  
Stuart Calder ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Ferromagnetic Component ◽  
Defect Pyrochlore ◽  
A Charge

Hydrothermal Synthesis and Structure of a Potassium Tantalum Defect Pyrochlore

1998 ◽  
Vol 37 (18) ◽  
pp. 4697-4701 ◽  
Author(s):  
Niangao Duan ◽  
Zheng-Rong Tian ◽  
William S. Willis ◽  
Steven L. Suib ◽  
John M. Newsam ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Defect Pyrochlore

scholarly journals Hydrothermal synthesis of perovskite and pyrochlore powders of potassium tantalate

2002 ◽  
Vol 17 (12) ◽  
pp. 3168-3176 ◽  
Author(s):  
Gregory K. L. Goh ◽  
Sossina M. Haile ◽  
Carlos G. Levi ◽  
Fred F. Lange
Keyword(s):  
Hydrothermal Synthesis ◽  
Perovskite Structure ◽  
Charge Compensation ◽  
Stable Phase ◽  
Water Molecules ◽  
Potassium Tantalate ◽  
Defect Pyrochlore

Potassium tantalate powders were hydrothermally synthesized at 100 to 200 °C in 4 to 15 M aqueous KOH solutions. A defect pyrochlore, Kta2O5(OH). nH2O (n ≈ 1.4), was obtained at 4 M KOH, but at 7–12 M KOH, this pyrochlore was gradually replaced by a defect perovskite as the stable phase. At 15 M KOH, there was no intermediate pyrochlore, only a defect perovskite, 0.85Ta0.92O2.43(OH)0.57 0.15H2O. Synthesis at higher KOH concentrations led to greater incorporation of protons in the perovskite structures. The potassium vacancies required for charge compensation of incorporated protons could accommodate water molecules in the perovskite structure.

ChemInform Abstract: Hydrothermal Synthesis and Structure of a Potassium Tantalum Defect Pyrochlore.

ChemInform ◽  
2010 ◽  
Vol 29 (47) ◽  
pp. no-no
Author(s):  
N. DUAN ◽  
Z.-R. TIAN ◽  
W. S. WILLIS ◽  
S. L. SUIB ◽  
J. M. NEWSAM ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Defect Pyrochlore

Synthesis of hydrated KTaWO6 nanoparticles and Sn(ii) incorporation for visible light absorption

Nanoscale ◽  
2018 ◽  
Vol 10 (20) ◽  
pp. 9691-9697 ◽  
Author(s):  
Morten Weiss ◽  
Roland Marschall
Keyword(s):  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Single Crystalline ◽  
Crystallite Sizes ◽  
Defect Pyrochlore

The defect-pyrochlore stuctured semiconductor KTaWO6 has been prepared via hydrothermal synthesis, resulting in single-crystalline nanoparticles with adjustable crystallite sizes between 15 and 24 nm.

Hydrothermal synthesis of MoS 2 nanoflowers and their capacitive property

2019 ◽  
Vol 14 (5) ◽  
pp. 493-495 ◽  
Author(s):  
Qinghua Yang ◽  
Chunni Xiao ◽  
Bingbing Chen ◽  
Lin Ma ◽  
Limei Xu
Keyword(s):  
Hydrothermal Synthesis ◽  
Capacitive Property

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

Experimental Evaluation of Turbo-Matching Appropriateness of B60J67, B60J68, A58N70 and A58N72 Turbo-Chargers for a Commercial Vehicle Engine

2018 ◽  
Vol 6 (11) ◽  
pp. 71
Author(s):  
Badal Dev Roy ◽  
R. Saravanan
Keyword(s):  
Internal Combustion Engines ◽  
Perfect Match ◽  
Engine Performance ◽  
Operating Conditions ◽  
Data Logger ◽  
Negative Effects ◽  
Road Test ◽  
The Road ◽  
A Charge ◽  
All Speeds

The Turbocharger is a charge booster for internal combustion engines to ensure best engine performance at all speeds and road conditions especially at the higher load.  Random selection of turbocharger may lead to negative effects like surge and choke in the breathing of the engine. Appropriate selection or match of the turbocharger (Turbomatching) is a tedious task and expensive. But perfect match gives many distinguished advantages and it is a one time task per the engine kind. This study focuses to match the turbocharger to desired engine by simulation and on road test. The objective of work is to find the appropriateness of matching of turbochargers with trim 67 (B60J67), trim 68 (B60J68),  trim 70 (A58N70) and trim 72 (A58N72) for the TATA 497 TCIC -BS III engine. In the road-test (data-logger method) the road routes like highway and slope up were considered for evaluation. The operating conditions with respect various speeds, routes and simulated outputs were compared with the help of compressor map.

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