Title of article :
Growth behaviour of potassium sodium niobate single crystals grown by solid-state crystal growth using K4CuNb8O23 as a sintering aid
Author/Authors :
Fisher، نويسنده , , John G. and Ben?an، نويسنده , , Andreja and Godnjavec، نويسنده , , Jerneja and Kosec، نويسنده , , Marija، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
7
From page :
1657
To page :
1663
Abstract :
The effect of addition of 0, 0.5 and 2 mol% K4CuNb8O23 liquid phase sintering aid on the growth of single crystals of (K0.5Na0.5)NbO3 by solid-state crystal growth (SSCG) was studied. Single crystal growth in the samples with 0 and 0.5 mol% K4CuNb8O23 was initially rapid and then tailed off with annealing time, due to matrix grain growth which reduced the driving force for crystal growth. Addition of 0.5 mol% K4CuNb8O23 caused a reduction in both single crystal and matrix grain growth rates. Addition of 2 mol% K4CuNb8O23 caused matrix grain growth to stagnate, resulting in an almost constant driving force and constant crystal growth during annealing. Single crystals grown using 0 and 0.5 mol% K4CuNb8O23 were stoichiometric, but single crystals grown with 2 mol% K4CuNb8O23 were Na-rich. This was due to lowering of the solidus temperature by addition of K4CuNb8O23.
Keywords :
(K , Na)NbO3 , single crystals , Interfaces , grain growth , Niobates , perovskites
Journal title :
Journal of the European Ceramic Society
Serial Year :
2008
Journal title :
Journal of the European Ceramic Society
Record number :
1409448
Link To Document :
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