Graphene-templated carbon aerogels combining with ultra-high electrical conductivity and ultra-low thermal conductivity

2017 ◽  
Vol 253 ◽  
pp. 71-79 ◽  
Author(s):  
Wei Sun ◽  
Ai Du ◽  
Guohua Gao ◽  
Jun Shen ◽  
Guangming Wu
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Carbon Aerogels ◽  
High Electrical Conductivity ◽  
Low Thermal Conductivity ◽  
Templated Carbon

Where Should We Look For High Zt Materials: Suggestions From Theory.

2000 ◽  
Vol 626 ◽  
Author(s):  
M. Fornari ◽  
D. J. Singh ◽  
I. I. Mazin ◽  
J. L. Feldman
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
First Principles ◽  
Room Temperature ◽  
First Principles Calculations ◽  
High Electrical Conductivity ◽  
Bulk Materials ◽  
Low Thermal Conductivity ◽  
Computational Exploration ◽  
Single Material

ABSTRACTThe key challenges in discovering new high ZT thermoelectrics are understanding how the nearly contradictory requirements of high electrical conductivity, high thermopower and low thermal conductivity can be achieved in a single material and based on this identifying suitable compounds. First principles calculations provide a material specific microscopic window into the relevant properties and their origins. We illustrate the utility of the approach by presenting specific examples of compounds belonging to the class of skutterudites that are or are not good thermoelectrics along with the microscopic reasons. Based on our computational exploration we make a suggestion for achieving higher values of ZT at room temperature in bulk materials, namely n-type La(Ru,Rh)4Sb12 with high La-filling.

Ultralow thermal conductivity and high thermoelectric figure of merit in mixed valence In5X5Br (X = S, and Se) compounds

2020 ◽  
Vol 8 (27) ◽  
pp. 13812-13819 ◽  
Author(s):  
Tribhuwan Pandey ◽  
Arun S. Nissimagoudar ◽  
Avanish Mishra ◽  
Abhishek K. Singh
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Figure Of Merit ◽  
Mixed Valence ◽  
Thermoelectric Figure Of Merit ◽  
High Electrical Conductivity ◽  
Thermoelectric Figure ◽  
Low Thermal Conductivity ◽  
Indium Compounds

We predict that mixed valent indium compounds exhibit a combination of high electrical conductivity, high thermopower, and low thermal conductivity, resulting in a large thermoelectric figure of merit.

COPPER ALLOY No. 815

Alloy Digest ◽  
1977 ◽  
Vol 26 (5) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Chromium Alloy ◽  
High Electrical Conductivity ◽  
Medium Hardness ◽  
Hardened Condition

Abstract Copper Alloy No. 815 is an age-hardenable cast copper-chromium alloy. It is characterized by high electrical and thermal conductivities combined with medium hardness and strength in the age-hardened condition. It is used for components requiring high electrical conductivity or high thermal conductivity. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-332. Producer or source: Copper alloy foundries.

Rapid microwave synthesis of Cu2Se thermoelectric material with high conductivity

2021 ◽  
pp. 2151005
Author(s):  
Yongpeng Wang ◽  
Wenying Wang ◽  
Haoyu Zhao ◽  
Lin Bo ◽  
Lei Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Grain Growth ◽  
Microwave Synthesis ◽  
Annealing Process ◽  
High Electrical Conductivity ◽  
Cooling Process ◽  
Slow Cooling ◽  
Te Material ◽  
Hot Pressing Sintering

In this study, the dense bulk Cu2Se thermoelectric (TE) materials were prepared by microwave melting and hot pressing sintering. The effects of different cooling processes on the microstructure and TE properties of Cu2Se were investigated. The results showed that the Cu2Se TE material prepared by microwave synthesis had high electrical conductivity, which was about 105 S⋅ m[Formula: see text]. The annealing process can lead to grain growth of Cu2Se and the formation of micropores in the Cu2Se, which deteriorated the thermal conductivity. The Cu2Se material prepared by the microwave melting and slow cooling process had the best TE performance, and the ZT value can reach 0.68 at 700 K.

scholarly journals Ultralow thermal conductivity in all-inorganic halide perovskites

2017 ◽  
Vol 114 (33) ◽  
pp. 8693-8697 ◽  
Author(s):  
Woochul Lee ◽  
Huashan Li ◽  
Andrew B. Wong ◽  
Dandan Zhang ◽  
Minliang Lai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Acoustic Phonon ◽  
Hole Mobility ◽  
High Electrical Conductivity ◽  
Microelectronic Devices ◽  
Collective Motions ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Energy Conversion Devices

Controlling the flow of thermal energy is crucial to numerous applications ranging from microelectronic devices to energy storage and energy conversion devices. Here, we report ultralow lattice thermal conductivities of solution-synthesized, single-crystalline all-inorganic halide perovskite nanowires composed of CsPbI3 (0.45 ± 0.05 W·m−1·K−1), CsPbBr3 (0.42 ± 0.04 W·m−1·K−1), and CsSnI3 (0.38 ± 0.04 W·m−1·K−1). We attribute this ultralow thermal conductivity to the cluster rattling mechanism, wherein strong optical–acoustic phonon scatterings are driven by a mixture of 0D/1D/2D collective motions. Remarkably, CsSnI3 possesses a rare combination of ultralow thermal conductivity, high electrical conductivity (282 S·cm−1), and high hole mobility (394 cm2·V−1·s−1). The unique thermal transport properties in all-inorganic halide perovskites hold promise for diverse applications such as phononic and thermoelectric devices. Furthermore, the insights obtained from this work suggest an opportunity to discover low thermal conductivity materials among unexplored inorganic crystals beyond caged and layered structures.

COPPER ALLOY No. C80100

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Copper Alloy ◽  
Room Temperature ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Good Resistance ◽  
Corrosion And Oxidation ◽  
Room Temperature Strength

Abstract Copper No. C80100 is a casting copper with high electrical conductivity (100% IACS). It has low room-temperature strength and hardness and medium-to-good ductility. It has excellent thermal conductivity and good resistance to corrosion, these characteristics make it highly suitable for many applications requiring good electrical and or thermal conductivity and resistance to corrosion and oxidation. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Cu-521. Producer or source: Copper alloy foundries.

BaCu2Se2 based compounds as promising thermoelectric materials

2015 ◽  
Vol 44 (5) ◽  
pp. 2285-2293 ◽  
Author(s):  
Jing Li ◽  
Li-Dong Zhao ◽  
Jiehe Sui ◽  
David Berardan ◽  
Wei Cai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Low Thermal Conductivity ◽  
Na Doping

The thermoelectric properties of Na doped BaCu2Se2 were studied. The electrical conductivity of BaCu2Se2 was increased by 2 orders of magnitude through Na doping at the Ba sites, combined with a surprisingly low thermal conductivity; a ZT of 1.0 has been obtained for Ba0.925Na0.075Cu2Se2 at 773 K.

Ultralow density carbon aerogels with low thermal conductivity up to 2000°C

2011 ◽  
Vol 65 (23-24) ◽  
pp. 3454-3456 ◽  
Author(s):  
Junzong Feng ◽  
Jian Feng ◽  
Yonggang Jiang ◽  
Changrui Zhang
Keyword(s):  
Thermal Conductivity ◽  
Carbon Aerogels ◽  
Low Thermal Conductivity

Sb deficiencies control hole transport and boost the thermoelectric performance of p-type AgSbSe2

2015 ◽  
Vol 3 (40) ◽  
pp. 10415-10421 ◽  
Author(s):  
Satya N. Guin ◽  
Kanishka Biswas
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Carrier Transport ◽  
Hole Transport ◽  
Thermoelectric Performance ◽  
Low Thermal Conductivity ◽  
New Strategy ◽  
P Type

We demonstrate a new strategy to control the carrier transport in AgSbSe2by introducing Sb deficiencies. Enhanced electrical conductivity and ultra-low thermal conductivity resulted a peak ZT value ∼1 at 610 K in Sb deficient AgSbSe2.

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