Quartz ceramics

CONTENTS
I. Introduction 211
II. Material preparation 211
III. Forming 212
IV. The one-component system and allotropic transformations of SiO₂ 215
V. Conversion to cristobalite and its kinetics 216
VI. Effect of impurities on crystallisation 217
VII. Effect of atmosphere on crystallisation 218
VIII. Sintering and annealing 218
IX. Surface impregnation and sealing 222
X. Properties and applications of quartz ceramics 223