PHASE-DIAGRAM OF A NICKEL-ZINC FERRITE OF COMPOSITION NI0.685ZN0.177FE2.138O4+GAMMA

被引：5

作者：

BRACCONI, P ^{[1
]}

GALLAGHER, PK ^{[1
]}

机构：

[1] BELL TEL LABS INC,MURRAY HILL,NJ 07974

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1979年 / 62卷 / 3-4期

关键词：

D O I：

10.1111/j.1151-2916.1979.tb19047.x

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：

The oxygen content of Ni0.685Zn0.177Fe2.138O4+γ was determined gravimetrically at atmospheric pressure in varying Po2, 3.5 × 10−4 to 1.0 atm at 600° to 1450°C. The phase boundary associated with the precipitation of α‐Fe2O3 was determined from the change in slope of γ vs T plots observed on heating. Metastability is particularly evident for curves observed on cooling. Isacompositional lines (0.002 < γ < 0.045) are shown on a plot of log PO2 vs 1/T. An enthalpy of ‐21.6 kcal/mol is calculated for the oxidation of Fe2+. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：172 / 176

页数：5

共 13 条

[1]

BLANK JM, 1961, J APPL PHYS, V32, P378

[2] KINETICS OF THE OXIDATION OF PLATINUM [J].