Analytical estimation of temperature dependence of electrical resistivity with heat treatment temperature of graphitizing carbon materials

2018 ◽  
Vol 545 ◽  
pp. 413-419 ◽  
Author(s):  
Ryong Haeng Ri ◽  
Sin Ung Ri ◽  
Yu Yong Ri
Keyword(s):  
Heat Treatment ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Heat Treatment Temperature ◽  
Carbon Materials ◽  
Treatment Temperature ◽  
Analytical Estimation

scholarly journals Electrical Resistivity of Carbonaceous Bed Material at High Temperature

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 933 ◽  
Author(s):  
Gerrit Ralf Surup ◽  
Tommy Andre Pedersen ◽  
Annah Chaldien ◽  
Johan Paul Beukes ◽  
Merete Tangstad
Keyword(s):  
Heat Treatment ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Carbon Source ◽  
Heat Treatment Temperature ◽  
Electric Arc ◽  
Treatment Temperature ◽  
Electric Arc Furnaces ◽  
Arc Furnaces ◽  
Set Up

This study reports the effect of high-temperature treatment on the electrical properties of charcoal, coal, and coke. The electrical resistivity of industrial charcoal samples used as a reducing agent in electric arc furnaces was investigated as a renewable carbon source. A set-up to measure the electrical resistivity of bulk material at heat treatment temperatures up to 1700 ∘C was developed. Results were also evaluated at room temperature by a four-point probe set-up with adjustable load. It is shown that the electrical resistivity of charcoal decreases with increasing heat treatment temperature and approaches the resistivity of fossil carbon materials at temperatures greater than 1400 ∘C. The heat treatment temperature of carbon material is the main influencing parameter, whereas the measurement temperature and residence time showed only a minor effect on electrical resistivity. Bulk density of the carbon material and load on the burden have a large impact on the electrical resistivity of each material, while the effect of particle size can be neglected at high heat treatment temperature or compacting pressure. The mechanical durability of charcoal slightly increased after heat treatment and decreased for coal and semi-coke samples. The results indicate that charcoal can be used as an efficient carbon source for electric arc furnaces.

Relation Between Heat-Treatment Temperature and Characteristics of Polyparaphenylene(PPP)-Based Carbon Materials for Lithium Ion Secondary Batteries

2001 ◽  
Vol 699 ◽  
Author(s):  
Kozo Osawa ◽  
Tatsuo Nakazawa ◽  
Kyoich Oshida ◽  
Morinobu Endo ◽  
Mildred S. Dresselhaus
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Carbon Materials ◽  
Layer Structure ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Treatment Temperature ◽  
Carbon Powder ◽  
Transmission Electron ◽  
Current Characteristics

AbstractPolyparaphenylene (PPP)-based carbon powder is expected for materials of the negative electrode of the lithium ion secondary batteries. In this study, effects of heat treatment temperature on the PPP materials are investigated by means of electrical and structural measurement. The layer structure of the powder is analyzed in detail by the transmission electron microscope observation combined with digital image processing. Charge-discharge current characteristics, electrical resistivity under pressure and layer structure of the PPP-based carbon powder are measured and discussed.

Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels

2013 ◽  
Vol 27 (10) ◽  
pp. 1079-1083
Author(s):  
Zhao-Hui LIU ◽  
Gen-Liang HOU ◽  
Xun-Jia SU ◽  
Feng GUO ◽  
Zhou XIAO ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Composite Aerogels

Spin-dependent-magnetoresistance control by regulation of heat treatment temperature for magnetite nano-particle sinter

2009 ◽  
Vol 18 (12) ◽  
pp. 935-938
Author(s):  
H. Kobori ◽  
T. Asahi ◽  
Y. Yamasaki ◽  
A. Sugimura ◽  
T. Taniguchi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Nano Particle

scholarly journals Water Resistance and Creep Behavior of Heat-Treated Moso Bamboo Determined by the Stepped Isostress Method

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1264
Author(s):  
Teng-Chun Yang ◽  
Tung-Lin Wu ◽  
Chin-Hao Yeh
Keyword(s):  
Heat Treatment ◽  
Water Absorption ◽  
Creep Behavior ◽  
Heat Treatment Temperature ◽  
Water Resistance ◽  
Absorption Efficiency ◽  
Treatment Temperature ◽  
Moso Bamboo ◽  
Phyllostachys Pubescens ◽  
Heat Treated

The influence of heat treatment on the physico-mechanical properties, water resistance, and creep behavior of moso bamboo (Phyllostachys pubescens) was determined in this study. The results revealed that the density, moisture content, and flexural properties showed negative relationships with the heat treatment temperature, while an improvement in the dimensional stability (anti-swelling efficiency and anti-water absorption efficiency) of heat-treated samples was observed during water absorption tests. Additionally, the creep master curves of the untreated and heat-treated samples were successfully constructed using the stepped isostress method (SSM) at a series of elevated stresses. Furthermore, the SSM-predicted creep compliance curves fit well with the 90-day full-scale experimental data. When the heat treatment temperature increased to 180 °C, the degradation ratio of the creep resistance (rd) significantly increased over all periods. However, the rd of the tested bamboo decreased as the heat treatment temperature increased up to 220 °C.

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