scholarly journals Attrition-enhanced nanocomposite synthesis of indium-filled, iron-substituted skutterudite antimonides for improved performance thermoelectrics

2013 ◽  
Vol 1490 ◽  
pp. 27-32 ◽  
Author(s):  
James Eilertsen ◽  
Matthias Trottmann ◽  
Sascha Populoh ◽  
Romain Berthelot ◽  
Charles M. Cooke ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ball Milling ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Mechanical Attrition ◽  
Cobalt Antimonide ◽  
Improved Performance

ABSTRACTNanostructuring has been the foremost approach to the manufacture of high-performance thermoelectric materials for nearly a decade. This study explores a novel nanostructuring technique, attrition-enhanced nanocomposite synthesis, in maximum indium-filled, iron-substituted cobalt antimonide skutterudites. In0.3Fe0.8Co3.2Sb12 was synthesized and subjected to varying degrees of mechanical attrition (via ball milling). These samples exhibited increased indium precipitation coincident with the duration of mechanical attrition. Indium readily diffused through the skutterudite crystal structure and rapidly precipitated forming 20-50 nm-sized indium-rich inclusions during sintering.

Crystal structure of high-performance thermoelectric materials by high resolution neutron powder diffraction

2018 ◽  
Vol 551 ◽  
pp. 64-68 ◽  
Author(s):  
Peng Wu ◽  
Yoshihisa Ishikawa ◽  
Masato Hagihala ◽  
Sanghyun Lee ◽  
Kunling Peng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Powder Diffraction ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Neutron Powder Diffraction

A Potential in Thermoelectric Oxide Phononic Crystal

2016 ◽  
Vol 257 ◽  
pp. 156-159
Author(s):  
Norifusa Satoh
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Thermoelectric Power ◽  
Heat Transport ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Phononic Crystal ◽  
Thermoelectric Oxide ◽  
Heavy Atoms ◽  
Atomic Properties

The high performance thermoelectric materials consist of heavy atoms due to their low thermal conductivity. However, the atomic properties have limited the thermoelectric power. The paper suggests that oxide may change the situation with a phononic crystal structure to inhibit heat transport.

Design of low cost, scalable, and high-performance TiS2 thermoelectric materials via wet ball-milling process

2021 ◽  
Author(s):  
Pandiyarasan Veluswamy ◽  
Saravanan Subramanian ◽  
Muhmood ul Hassan ◽  
Cafer T. Yavuz ◽  
Ho Jin Ryu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Low Cost ◽  
Milling Process ◽  
Ball Milling Process

scholarly journals Engineering minerals for performance applications: an industrial perspective

Clay Minerals ◽  
2014 ◽  
Vol 49 (1) ◽  
pp. 1-16 ◽  
Author(s):  
J . S. Phipps
Keyword(s):  
Crystal Structure ◽  
Refractive Index ◽  
Physical Properties ◽  
High Performance ◽  
End User ◽  
Shape Distribution ◽  
Industrial Mineral ◽  
Improved Performance ◽  
New Applications ◽  
Do So

AbstractTo a mineralogist, minerals are defined primarily by their crystal structure and chemical composition. Many minerals of industrial importance retain this identity in their final application. For the producer and end user, the physical properties of these industrial mineral products such as size and shape distribution, refractive index, density, hardness, refractoriness and colour are of primary importance, since it is the combination of these, together with its surface chemistry, which gives the mineral its functionality. As a result, minerals which are very different in structure and origin but have many similar physical properties, such as kaolin and calcium carbonate, are often used in very similar roles and in similar applications.Examples of mineral use in diverse applications such as paper, paints and coatings, polymers and films show how the physical properties of different minerals are exploited and engineered to provide optical, mechanical and rheological performance and to minimise cost. Industrial mineral producers have been manipulating these properties for many decades and continue to do so in search of improved performance and new applications. As new high performance materials become more commonplace, the challenge is to find new ways of transforming minerals to provide the necessary functionality for them.

scholarly journals Polymer/Iron-Based Layered Double Hydroxides as Multifunctional Wound Dressings

Pharmaceutics ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1130
Author(s):  
Mariana Pires Figueiredo ◽  
Ana Borrego-Sánchez ◽  
Fátima García-Villén ◽  
Dalila Miele ◽  
Silvia Rossi ◽  
...  
Keyword(s):  
Drug Release ◽  
High Performance ◽  
Mechanical Performance ◽  
Release Kinetics ◽  
Wound Dressings ◽  
In Vitro Drug Release ◽  
Improved Performance ◽  
Double Hydroxide ◽  
Double Hydroxides

This work presents the development of multifunctional therapeutic membranes based on a high-performance block copolymer scaffold formed by polyether (PE) and polyamide (PA) units (known as PEBA) and layered double hydroxide (LDH) biomaterials, with the aim to study their uses as wound dressings. Two LDH layer compositions were employed containing Mg2+ or Zn2+, Fe3+ and Al3+ cations, intercalated with chloride anions, abbreviated as Mg-Cl or Zn-Cl, or intercalated with naproxenate (NAP) anions, abbreviated as Mg-NAP or Zn-NAP. Membranes were structurally and physically characterized, and the in vitro drug release kinetics and cytotoxicity assessed. PEBA-loading NaNAP salt particles were also prepared for comparison. Intercalated NAP anions improved LDH–polymer interaction, resulting in membranes with greater mechanical performance compared to the polymer only or to the membranes containing the Cl-LDHs. Drug release (in saline solution) was sustained for at least 8 h for all samples and release kinetics could be modulated: a slower, an intermediate and a faster NAP release were observed from membranes containing Zn-NAP, NaNAP and Mg-NAP particles, respectively. In general, cell viability was higher in the presence of Mg-LDH and the membranes presented improved performance in comparison with the powdered samples. PEBA containing Mg-NAP sample stood out among all membranes in all the evaluated aspects, thus being considered a great candidate for application as multifunctional therapeutic dressings.

Pavonite homologues as potential n-type thermoelectric materials: crystal structure and performance

2021 ◽  
Author(s):  
Shangqing Qu ◽  
Jing Zhao ◽  
Zimin Jiang ◽  
Dequan Jiang ◽  
Yonggang Wang
Keyword(s):  
Crystal Structure ◽  
Thermoelectric Material ◽  
Thermoelectric Materials ◽  
Homologous Series ◽  
And Performance

The pavonite homologous series assembled from two basic modules is a potential n-type thermoelectric material.

Precision grain Boundary Engineering in commercial Bi2Te2.7Se0.3 thermoelectric materials towards high performance

2021 ◽  
Author(s):  
Shuankui Li ◽  
Zhongyuan Huang ◽  
Rui Wang ◽  
Chaoqi Wang ◽  
Wenguang Zhao ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Thermoelectric Materials ◽  
High Performance ◽  
General Strategy ◽  
Grain Boundary Engineering

The strong interrelation between electrical and thermo parameters have been regarded as one of the biggest bottlenecks to obtain high-performance thermoelectric materials. Therefore, to explore a general strategy to fully...

scholarly journals SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation Under Extended Solar Irradiation

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 589
Author(s):  
Sivagowri Shanmugaratnam ◽  
Balaranjan Selvaratnam ◽  
Aravind Baride ◽  
Ranjit Koodali ◽  
Punniamoorthy Ravirajan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Environmental Remediation ◽  
High Performance ◽  
Degradation Mechanism ◽  
Solar Irradiation ◽  
Earth Abundant ◽  
Improved Performance ◽  
Chalcogenide Materials

Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and optical properties. This study focuses on the photocatalytic activity of flower-like SnS2 nanoparticles (composed of nanosheet subunits) embedded in TiO2 synthesized by a facile hydrothermal method. The materials were characterized using different techniques, and their photocatalytic activity was assessed for hydrogen evolution reaction and the degradation of methylene blue. Among the catalysts studied, 10 wt. % of SnS2 loaded TiO2 nanocomposite shows an optimum hydrogen evolution rate of 195.55 µmolg−1, whereas 15 wt. % loading of SnS2 on TiO2 exhibits better performance against the degradation of methylene blue (MB) with the rate constant of 4.415 × 10−4 s−1 under solar simulated irradiation. The improved performance of these materials can be attributed to the effective photo-induced charge transfer and reduced recombination, which make these nanocomposite materials promising candidates for the development of high-performance next-generation photocatalyst materials. Further, scavenging experiments were carried out to confirm the reactive oxygen species (ROS) involved in the photocatalytic degradation. It can be observed that there was a 78% reduction in the rate of degradation when IPA was used as the scavenger, whereas around 95% reduction was attained while N2 was used as the scavenger. Notably, very low degradation (<5%) was attained when the dye alone was directly under solar irradiation. These results further validate that the •OH radical and the superoxide radicals can be acknowledged for the degradation mechanism of MB, and the enhancement of degradation efficiency may be due to the combined effect of in situ dye sensitization during the catalysis and the impregnation of low bandgap materials on TiO2.

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