High-Temperature Catalytic Reforming of n-Hexane over Supported and Core–Shell Pt Nanoparticle Catalysts: Role of Oxide–Metal Interface and Thermal Stability

Nano Letters ◽  
2014 ◽  
Vol 14 (8) ◽  
pp. 4907-4912 ◽  
Author(s):  
Kwangjin An ◽  
Qiao Zhang ◽  
Selim Alayoglu ◽  
Nathan Musselwhite ◽  
Jae-Youn Shin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Core Shell ◽  
Pt Nanoparticle ◽  
Metal Interface ◽  
Catalytic Reforming ◽  
Nanoparticle Catalysts

High-Temperature Stable Gold Nanoparticle Catalysts for Application under Severe Conditions: The Role of TiO2 Nanodomains in Structure and Activity

ACS Catalysis ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1078-1086 ◽  
Author(s):  
Begoña Puértolas ◽  
Álvaro Mayoral ◽  
Raul Arenal ◽  
Benjamín Solsona ◽  
Alaina Moragues ◽  
...  
Keyword(s):  
High Temperature ◽  
Gold Nanoparticle ◽  
Nanoparticle Catalysts ◽  
Structure And Activity

Construction of flexible 1D core-shell Al2O3@NaNbO3 nanowires/poly-(p-phenylene benzobisoxazole) nanocomposite with stable and enhanced dielectric properties in an ultra-wide temperature range

2021 ◽  
Author(s):  
Jinpeng Li ◽  
Junhao Jiang ◽  
Qilin Cheng ◽  
Zhong-Kai Cui ◽  
Xiaoyun Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Dielectric Properties ◽  
Wide Temperature Range ◽  
Core Shell ◽  
Critical Importance ◽  
Excellent Thermal Stability ◽  
Temperature Range ◽  
The Poor ◽  
Polymeric Dielectrics

Polymeric dielectrics with high-temperature resilience are of critical importance in developing advanced electrostatic capacitors. Poly-(p-phenylene benzobisoxazole) (PBO) is a polymer with excellent thermal stability. However, the poor processability and low...

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

High-Temperature Synthesis of CdSe-Based Core/Shell, Core/Shell/Shell, and Core/Graded-Shell Nanoplatelets for Stable and Efficient Narrowband Emitters

2019 ◽  
Author(s):  
Aurelio A. Rossinelli ◽  
Henar Rojo ◽  
Aniket S. Mule ◽  
Marianne Aellen ◽  
Ario Cocina ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Equilibrium Shape ◽  
Size Variation ◽  
Crystal Defects ◽  
Atomic Scale ◽  
Quantum Yields ◽  
Core Shell ◽  
Compositional Gradient ◽  
High Quality

<div>Colloidal semiconductor nanoplatelets exhibit exceptionally narrow photoluminescence spectra. This occurs because samples can be synthesized in which all nanoplatelets share the same atomic-scale thickness. As this dimension sets the emission wavelength, inhomogeneous linewidth broadening due to size variation, which is always present in samples of quasi-spherical nanocrystals (quantum dots), is essentially eliminated. Nanoplatelets thus offer improved, spectrally pure emitters for various applications. Unfortunately, due to their non-equilibrium shape, nanoplatelets also suffer from low photo-, chemical, and thermal stability, which limits their use. Moreover, their poor stability hampers the development of efficient synthesis protocols for adding high-quality protective inorganic shells, which are well known to improve the performance of quantum dots. <br></div><div>Herein, we report a general synthesis approach to highly emissive and stable core/shell nanoplatelets with various shell compositions, including CdSe/ZnS, CdSe/CdS/ZnS, CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S, and CdSe/ZnSe. Motivated by previous work on quantum dots, we find that slow, high-temperature growth of shells containing a compositional gradient reduces strain-induced crystal defects and minimizes the emission linewidth while maintaining good surface passivation and nanocrystal uniformity. Indeed, our best core/shell nanoplatelets (CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S) show photoluminescence quantum yields of 90% with linewidths as low as 56 meV (19.5 nm at 655 nm). To confirm the high quality of our different core/shell nanoplatelets for a specific application, we demonstrate their use as gain media in low-threshold ring lasers. More generally, the ability of our synthesis protocol to engineer high-quality shells can help further improve nanoplatelets for optoelectronic devices.</div>

NIPPON/SUMITOMO SUPER625

Alloy Digest ◽  
2017 ◽  
Vol 66 (12) ◽  
Keyword(s):  
Thermal Stability ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Hot Workability ◽  
Temperature Performance ◽  
Compositional Elements

Abstract Nippon Sumitomo Super625 is a nickel alloy with an optimization of compositional elements for thermal stability and hot workability. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming. Filing Code: Ni-740. Producer or source: Sumitomo Metal USA Corporation.

scholarly journals The role of the substrate on the mechanical and thermal stability of Pd thin films during hydrogen (de)sorption

2021 ◽  
Vol 46 (5) ◽  
pp. 4137-4153
Author(s):  
Neha Verma ◽  
Rob Delhez ◽  
Niek M. van der Pers ◽  
Frans D. Tichelaar ◽  
Amarante J. Böttger
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Thermal Stability Of
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