Structure and Properties of Boronated Graphite

被引：6

作者：

Hishiyama, Yoshihiro ^{[1
]}

Kaburagi, Yutaka ^{[1
]}

Kobayashi, Kazuo ^{[2
]}

Inagaki, Michio ^{[3
]}

机构：

[1] Musashi Inst Technol, Fac Engn, Setagaya Ku, Tokyo 158, Japan

[2] Nagasaki Univ, Fac Engn, Nagasaki 852, Japan

[3] Hokkaido Univ, Fac Engn, Kita Ku, Sapporo, Hokkaido 060, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1998年 / 310卷

关键词：

Boronated natural graphite compact; interlayer spacing d(002); lattice constant a(0); electrical resistivity; magnetoresistance; Hall coefficient;

D O I：

10.1080/10587259808045349

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Boronated natural graphite compacts were prepared at a temperature of 1750 C under pressures between 0.1 and 0.5 GPa with a nominal B(4)C content of 2 wt.% and at 2200 degrees C under apressure of 19.8 MPa with nominal B(4)C contents of 1,2.5 and 50 wt.%. Their interlayer spacing d(002) and lattice constant a. were determined. The measurements of the electrical resistivity, magnetoresistance and Hall coefficient for the compacts were carried out mainly at liquid nitrogen temperature. With the increased substitution of boron atoms, the interlayer spacing d(002) decreases from the values of the reference natural graphite compacts, showing a trend of the lattice constant a. to increase slightly. At liquid nitrogen temperature, all of the boronated compacts show the positive Hall coefficient decreasing with the increase in substituted and ionized boron atom. Below liquid nitrogen temperature, the boronated compacts except the slightly boronated ones exhibit the negative magnetoresistance and almost temperature independent resistivity.

引用

页码：279 / 284

页数：6