Aluminum nitride shaping by non-aqueous gelcasting of low-viscosity and high solid-loading slurry
Shen, L; Xu, X; Lu, Wei; Shi, Bo
| HERO ID | 3577559 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | Aluminum nitride shaping by non-aqueous gelcasting of low-viscosity and high solid-loading slurry |
| Authors | Shen, L; Xu, X; Lu, Wei; Shi, Bo |
| Journal | Ceramics International |
| Volume | 42 |
| Issue | 4 |
| Page Numbers | 5569-5574 |
| Abstract | Aluminum nitride (AlN) ceramics has been prepared by a modified non-aqueous gelcasting technique, and the ceramic slurries with low viscosity and high solid loading were obtained by using 1-methyl-2-pyrrolidinone as solvent and Solsperse 24,000 as dispersant. The rheological behaviors of the AlN ceramic slurry and the densities of AlN ceramics were studied. Typically, the AlN ceramic slurry (Solsperse 24,000 of 0.5 wt% and solid loading of 50 vol%) showed a viscosity of 0.09 Pa.s at shear rate of 100 s(-1). And more interestingly, when increasing solid loading to 55 vol%, the AlN slurry still kept a low viscosity of about 0.28 Pa.s, which was reduced by 30% compared to the reported values. As a result, the resultant green body exhibited a relative density of 65.5%, and a flexural strength of 42.3 MPa. After sintering at 1900 degrees C for 5 h, the AlN ceramics with an improved relative density of 99.4% was produced. Thus, this research would provide a new way to prepare low-viscosity and high solid-loading AlN slurry. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| Doi | 10.1016/j.ceramint.2015.12.036 |
| Wosid | WOS:000369460500123 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Aluminum nitride; Ceramics; Gelcasting; Rheological properties; Solid loading |