Magnetic glass-ceramics

被引：17

作者：

Sandu, Viorel ^{[1
]}

Nicolescu, Mirela Sidonia ^{[1
]}

Kuncser, Victor ^{[1
]}

Damian, Raluca ^{[1
]}

Sandu, Elena ^{[2
]}

机构：

[1] Natl Inst Mat Phys, Magurele 077125, Romania

[2] Horia Hulubei Natl Inst Nucl Phys & Engn, Magurele 077125, Romania

来源：

JOURNAL OF ADVANCED CERAMICS | 2012年 / 1卷 / 02期

关键词：

glass ceramics; Fe3O4; Mossbauer spectroscopy; grain growth; FERRITE;

D O I：

10.1007/s40145-012-0010-4

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：

We present the magnetic properties of magnetic glass ceramics obtained by crystallization of Fe containing borosilicate glass. Two types of nucleators have been used: Cr2O3 and P2O5. The role of the nucleators proved to be crucial in the size and morphology of the crystallites developed within glassy matrix as well in the magnetic response. The former stimulates the growth of regular single crystals uniformly dispersed within the matrix whereas the latter leads to the formation of grains made of tiny (30 nm), nanocrystals. The magnetic response depends on the amount of Fe ions left dispersed within glassy matrix as paramagnetic ions. Although P2O5 leads to the best structural magnetite, almost 42% of Fe ions are left dispersed in the matrix without magnetic interaction. In the case of Cr2O3, the paramagnetic Fe is decreased to 12% but structural deficiency in the occupancy of the Fe sites of magnetite is revealed by Mossbauer spectroscopy.

引用

页码：138 / 143

页数：6

共 23 条

[1] Preparation and characterization of some ferromagnetic glass-ceramics contains high quantity of magnetite [J].