Thermal transformation of synthetic euhedral and fibrillar crystals of boehmite into aluminas

• Published in: Materials research bulletin Vol. 31; no. 7; pp. 799 - 807
• Main Authors: De Souza Santos, Helena, Kiyohara, Pedro K., De Souza Santos, Pérsio
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 01.07.1996; Amsterdam Elsevier Science
• Subjects: A. oxides; B. sol-gel chemistry; C. electron microscopy; C. X-ray diffraction; Cross-disciplinary physics: materials science; rheology; D. phase transitions; Exact sciences and technology; Materials science; Methods of crystal growth; physics of crystal growth; Physics; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; B. sol-gel chemistry; D. phase transitions; C. electron microscopy; A. oxides; C. X-ray diffraction; Inorganic compounds; Morphological changes; Synthetic mineral; Phase transformations; Ternary compounds; Crystallization; Binary compounds; Fibrillar structure; Experimental study; Aluminium hydroxides; Crystal growth habit; Crystal growth from solutions; Alumina; Aluminium oxides

Fibrillar pseudoboehmite and euhedral lath-like boehmite aqueous sols were prepared from the reaction of aluminium secondary butoxide and acetic acid in order to have a solid content of 70g/1 of AlOOH. The dried solids were fired from 200 °C to 1500 °C and examined by TEM, SEM, SAED, and XRD to comp...