Porous electrically conductive materials produced by Spark Plasma Sintering and hot pressing of nanodiamonds

被引:15
作者
Ukhina, Arina V. [1 ]
Dudina, Dina V. [2 ,3 ]
Anisimov, Alexander G. [3 ]
Mali, Vyacheslav I. [3 ]
Bulina, Natalia V. [1 ]
Bataev, Ivan A. [4 ]
Skovorodin, Ivan N. [5 ]
Bokhonov, Boris B. [1 ,2 ]
机构
[1] Inst Solid State Chem & Mech SB RAS, Novosibirsk 630128, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
[3] Lavrentyev Inst Hydrodynam SB RAS, Novosibirsk 630090, Russia
[4] Novosibirsk State Tech Univ, Novosibirsk 630073, Russia
[5] Inst Automat & Electrometry SB RAS, Novosibirsk 630090, Russia
基金
俄罗斯基础研究基金会;
关键词
Nanodiamonds; Spark Plasma Sintering; Hot pressing; Graphitization; Electrical conductivity; ONION-LIKE CARBON; ULTRA-DISPERSE DIAMOND; DETONATION NANODIAMOND; GRAPHITIZATION;
D O I
10.1016/j.ceramint.2015.06.055
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Nanodiamond particles are known to graphitize upon annealing gradually transforming into carbon onion structures. The goal of this work was to evaluate the potential of nanodiamond powders as a raw material to produce bulk porous electrically conductive materials by means of graphitization-accompanied Spark Plasma Sintering and hot pressing. Despite consolidation that occurred in parallel to graphitization, an increase in the specific surface area (up to 510 m(2) g(-1)) relative to the nanodiamond powder (360 m(2) g(-1)) was observed in compacts with high graphitization degrees. Compacts Spark Plasma Sintered at 1200 degrees C and hot-pressed at 1500 degrees C showed high electrical conductivities, which were one order of magnitude higher than those of the powders produced by nanodiamond graphitization and only 40-50 times lower than that of bulk graphite. Based on these results, a conclusion was made that consolidation of nanodiamonds by Spark Plasma Sintering and hot pressing can be used for developing porous electrically conductive materials with tailored specific surface area. A possible influence of electric current on graphitization of nanodiamonds during Spark Plasma Sintering was suggested. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:12459 / 12463
页数:5
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