TITLE:
High-Density Ceramics of Al2-xMex (WO4)3, (Me = Sc or In) Solid Solutions
AUTHORS:
Iovka Koseva, Aneliya Yordanova, Velin Nikolov
KEYWORDS:
Ceramics; Sintering; Compaction; Electron Microscopy (SEM)
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.3 No.4,
October
21,
2013
ABSTRACT: Al2-xMex(WO4)3,
(Me is Sc or In; x varies from 0 to 2) ceramics are sintered by two methods: 1) cold pressing with subsequent
sintering at different temperatures and durations and 2) hot pressure sintering. The row
materials are nanoparticles with average particle size of 20, 90 and 200 nm
obtained by co-precipitation method. Density, particle size and anisometricity
of the obtained ceramics are tested. The results show that optimal initial
nanosized dimensions and optimal pressing conditions are needed to obtain
compact ceramics. The hot pressure method provides possibilities for obtaining
ceramics with a density of about 99.8%. These ceramics possess some level of
transparency.