TY - JOUR
T1 - Aqueous slip casting of transparent yttrium aluminum garnet (YAG) ceramics
AU - Appiagyei, Kwadwo A.
AU - Messing, Gary L.
AU - Dumm, John Q.
N1 - Funding Information:
KAA was on sabbatical leave at Penn State from the Kwame Nkrumah University of Science and Technology, Kumasi, Ghana when this research was carried out. This work was supported by VLOC Inc., Trinity, Florida with funds received from VLOC's prime contract #N66001-00-C-6008.
PY - 2008/7
Y1 - 2008/7
N2 - Transparent YAG ceramics were prepared by slip casting an aqueous dispersed mixture of commercial Al2O3 and Y2O3 powders. The powders were co-dispersed with poly(acrylic acid) and citric acid. Polyethylene glycol of 0.5 wt.% (PEG 4000) and 0.5 wt.% tetraethyl orthosilicate were added as binder and a sintering aid, respectively. Dried samples were vacuum sintered at 1800 °C for 16 h. In general, YAG ceramics cast from Newtonian suspensions were optically transparent and had optical transmittances >80% from 340 to 840 nm. Slightly flocculated dispersions, as evidenced by higher viscosity and non-Newtonian rheology, resulted in translucent samples with large pores and lower optical transmittances.
AB - Transparent YAG ceramics were prepared by slip casting an aqueous dispersed mixture of commercial Al2O3 and Y2O3 powders. The powders were co-dispersed with poly(acrylic acid) and citric acid. Polyethylene glycol of 0.5 wt.% (PEG 4000) and 0.5 wt.% tetraethyl orthosilicate were added as binder and a sintering aid, respectively. Dried samples were vacuum sintered at 1800 °C for 16 h. In general, YAG ceramics cast from Newtonian suspensions were optically transparent and had optical transmittances >80% from 340 to 840 nm. Slightly flocculated dispersions, as evidenced by higher viscosity and non-Newtonian rheology, resulted in translucent samples with large pores and lower optical transmittances.
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U2 - 10.1016/j.ceramint.2007.03.010
DO - 10.1016/j.ceramint.2007.03.010
M3 - Article
AN - SCOPUS:43449088830
VL - 34
SP - 1309
EP - 1313
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 5
ER -