Study of transition metal ion doped mullite by positron annihilation techniques

被引：25

作者：

Sanyal, D

Banerjee, D

Bhattacharya, R

Patra, SK

Chaudhuri, SP

Ganguly, BN

De, U

机构：

[1] CENT GLASS & CERAM RES INST,CALCUTTA 700032,W BENGAL,INDIA

[2] SAHA INST NUCL PHYS,CALCUTTA 700064,W BENGAL,INDIA

[3] BHABHA ATOM RES CTR,CTR VARIABLE ENERGY CYCLOTRON,DEPT ATOM ENERGY,CALCUTTA 700064,W BENGAL,INDIA

来源：

JOURNAL OF MATERIALS SCIENCE | 1996年 / 31卷 / 13期

关键词：

D O I：

10.1007/BF00360747

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mullite, an extremely useful ceramic material, is doped with transition metal ions. The changes in the electronic properties of these doped materials have been studied by positron annihilation lifetime spectroscopy as well as Doppler broadened line shape analysis. The results on the positron annihilation parameters are characteristic of ionic size, oxidation state and the ''d''-electron configuration of the respective transition metals doped in the parent lattice of the mullite. These results, along with the resistivity measurements are suggestive of transition of the parent mullite from an insulator to a semimetal in the modified structure.

引用

页码：3447 / 3451

页数：5