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

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期

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

页码：12459 / 12463

页数：5

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