Role of Acid-Base Interactions in Synthesis of Cordierite from Talc and Sillimanite Group Minerals

被引：2

作者：

Avvakumov, E. G. ^{[1
]}

Lepezin, G. G. ^{[2
]}

Gusev, A. A. ^{[1
]}

Vinokourova, O. B. ^{[1
]}

机构：

[1] Inst Solid State Chem & Mechanochem SB RAS, Novosibirsk 630128, Russia

[2] Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia

来源：

SCIENCE OF SINTERING | 2013年 / 45卷 / 03期

关键词：

Cordierite; Synthesis; Sillimanite group minerals; Talc; Quartz; Mechanical activation; Heat treatment;

D O I：

10.2298/SOS1303273A

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：

It has been found that the mechanical activation of mixtures of sillimanite group minerals with talc and silica additives in grinding-activating devices with periodic and flow action provides significant acceleration of their interaction with formation of cordierite at the subsequent high-temperature treatment. It is shown that the output of cordierite depends on nature of mineral: in mixture with a sillimanite it is considerably higher, than with an andalusite and kyanite, while the rate of mullitization of these minerals has opposite character. It means that the formation of mullite during heat treatment is not a limiting step in synthesis of cordierite. It is shown that the rate of reaction is determined by the difference in the acid-base properties of these minerals, which depend on the coordination of aluminum cations by oxygen ions, different for each of the modifications.

引用

页码：273 / 279

页数：7