Premium
Sol–Gel Preparation and Characterization of Lithium Disilicate Glass–Ceramic
Author(s) -
Zhang T Bo,
Easteal Allan J.,
Edmonds Neil R.,
Bhattacharyya Debes
Publication year - 2007
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.1551-2916.2007.01561.x
Subject(s) - differential scanning calorimetry , crystallinity , materials science , sol gel , thermogravimetric analysis , amorphous solid , ceramic , lithium (medication) , mineralogy , chemical engineering , analytical chemistry (journal) , crystallography , composite material , chemistry , nanotechnology , organic chemistry , medicine , physics , endocrinology , engineering , thermodynamics
A sol–gel process is described for preparation of crystalline lithium disilicate (Li 2 Si 2 O 5 ) from tetraethylorthosilicate and lithium ethoxide. The glass network structure and crystallinity resulting from heat treatment at temperatures from 150° to 900°C were investigated by nuclear magnetic resonance, X‐ray diffraction, and differential scanning calorimetry/thermogravimetric analysis. Q 3 structural units (SiO 4 tetrahedra with three bridging oxygen atoms) formed in the amorphous gel at a low temperature (≤150°C) persist to elevated temperature (≤500°C) and directly transform to crystalline Li 2 Si 2 O 5 at about 550°C. The heating schedule slightly affects the crystalline phase transformation.