Premium
Fabrication of Translucent Magnesium Aluminum Spinel Ceramics
Author(s) -
Li JiGuang,
Ikegami Takayasu,
Lee JongHeun,
Mori Toshiyuki
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01648.x
Subject(s) - spinel , thermogravimetry , calcination , hydrotalcite , materials science , differential thermal analysis , magnesium , hydrate , ammonium bicarbonate , scanning electron microscope , aluminium , inorganic chemistry , mineralogy , chemical engineering , nuclear chemistry , metallurgy , chemistry , diffraction , composite material , catalysis , organic chemistry , raw material , physics , optics , engineering
A precursor for magnesium aluminum spinel powder, composed of crystalline ammonium dawsonite hydrate (NH 4 Al(OH) 2 CO 3 ·H 2 O) and hydrotalcite (Mg 6 Al 2 (CO 3 )(OH) 16 ·4H 2 O) phases, was synthesized via precipitation, using ammonium bicarbonate as the precipitant. The precursor was characterized by differential thermal analysis/thermogravimetry, X‐ray diffractometry, and scanning electron microscopy. Reactive spinel powder, which could be densified to translucency under vacuum at 1750°C in 2 h without additives, was obtained by calcining the precursor at 1100°C for 2 h.