Abstract

The effect of the rate of heating of kaolinite Al₄[Si₄O₁₀](OH)₈ on its transformation into mullite 3Al₂O₃ · 2SiO₂ has been studied. The mullite yield increases with the heating rate. The temperature rise at a high rate promotes rapid dehydration of kaolinite, which is accompanied by detachment of hydroxo groups and structural disordering. The effects of preliminary mechanoactivation of kaolin in a ball-and-ring mill, which abrases a material, and in a planetary mill, in which shock loads dominate, have been compared. It has been established that attrition treatment is ineffective. The intense impact-abrasion treatment in a planetary mill breaks up packets and layers; a part of hydroxo groups appear on the outer surface of polycrystallites, which facilitates dehydroxylation.

中文翻译：

---

高岭石热处理和机械活化方式对莫来石形成的影响

摘要

研究了加热速率对高岭石Al ₄ [Si ₄ O ₁₀ ](OH) _{8向莫来石3Al 2} O ₃  ·2SiO ₂转变的影响。莫来石产率随着加热速率的增加而增加。高速升温促进高岭石快速脱水，伴随着羟基的脱离和结构紊乱。比较了高岭土在研磨材料的球环磨机和以冲击载荷为主的行星磨机中的初步机械活化的效果。已经证实，磨损治疗是无效的。行星式磨机中的强烈冲击磨损处理可破碎颗粒和层；部分羟基出现在多晶的外表面上，有利于脱羟基。