Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1612092 | Journal of Alloys and Compounds | 2014 | 7 Pages |
Abstract
Ball-milling granulation parameters with polyvinyl butyral (PVB) adhesive have been optimized for the preparation of granulated Yb:YAG powders, using the co-precipitated raw powders. The influence of the amount of PVB (0-1.5 wt%) and ball-milling time (0-20 h) on the phase composition, particle size and morphologies of resultant powders is evaluated. The results show that ball milling for 10 h breaks the sintering neck of the particles while 0.5 wt% PVB adhesive contributes to ball-milling granulation and boosts the dispersion of granulated powders. It is found that when ball-milled with 0.5 wt% PVB for 10 h, the powders show high sintering activity. Using these granulated nanopowders, nearly full dense Yb:YAG ceramic with 99.6% of theoretical density was obtained by vacuum sintering at 1750 °C for 15 h. The optical transmittance of Yb:YAG ceramic reaches up to 80% in the visible light region and 82% at 1030 nm. The sample exhibit pore-free structures and the average grain size is about 9 μm. Experimental evidence proved that ball-milling granulation with PVB adhesive could be an effective and facile method to improve sinterability of nanopowders.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Xingtao Chen, Tiecheng Lu, Nian Wei, Zhongwen Lu, Wei Zhang, Benyuan Ma, Yongbin Guan, Wei Liu, Fenfen Jiang,