Gelcasting of silicon carbide based on gelation of sodium alginate
Source abstract
Abstract
A novel gel-casting process by sodium alginate gelation is presented. Solidified agent and chelator are added into sodium alginate solution simultaneously, thus the gelation between calcium ions and sodium alginate is avoided in this stage due to the chelate complex formed from the chelator and solidified agent (calcium salt). By adding hexanedioic acid, free calcium ions are released from the chelate complexes and react with sodium alginate, forming a three-dimensional network. Therefore, silicon carbide particles are held in this three-dimensional network and the slurry is consolidated. Green body with bending strength of ∼3 MPa, perfect surface and homogeneous microstructure has been produced by this process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced Surface Polishing Techniques · Silicon Nanostructures and Photoluminescence
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
1. Gelcasting of concentrated aqueous silicon carbide suspension10.1016/S0955-2219(99)00138-7 ↗
2. Dispersion, slip casting and reaction nitridation of silicon–silicon carbide mixtures10.1016/S0955-2219(99)00019-9 ↗
3. L.J. Zhou, Y. Huang, Z.P. Xie, J.L. Yang, Q. Tang, Study on gelcasting of silicon carbide, in: Proceedings of the First China International Conference on High-Performance Ceramics, October 1998, Beijing.
4. Gelcasting a new ceramic forming process
5. A.J. Ruys, C.C. Sorrell, Slip casting alumina with Na–CMC, The American Ceramic Society Bulletin, 75 (11) (1996).
6. A new gel casting of ceramic by reaction of sodium alginate and calcium iodate at increased temperatures10.1023/A:1010943427450 ↗
7. Alumina casting based on gelation of gelatine10.1016/S0955-2219(98)00201-5 ↗
8. Gelation forming of ceramic compacts using agarose10.1179/096797899680246 ↗
9. Preparation of structured ceramics for membranes10.4028/www.scientific.net/KEM.132-136.1754 ↗
10. Kennith Clare, ALGIN, Industrial gums, 3rd Edition.
11. J. Cesarano III, I.A. Aksay, Processing of highly concentrated aqueous α-alumina suspensions stabilized with polyelectrolytes, Journal of the American Ceramic Society 71 (12) (1988).10.1111/j.1151-2916.1988.tb05792.x ↗
12. Low-density silicon nitride beads as high-temperature microwave furnace insulation10.1016/S0025-5408(97)00046-9 ↗
13. Study on gelcasting and the properties of recrystallized silicon carbide10.1016/S0272-8842(01)00104-3 ↗
14. DLVO theory and clay aggregate architectures formed with AlCl310.1016/S0955-2219(98)00264-7 ↗
15. Optimization of dispersion and viscosity of a ceramic jet printing ink10.1111/j.1151-2916.1997.tb02855.x ↗
16. Effect of pH on the dispersibility of silicon carbide powders in aqueous media10.1016/S0272-8842(98)00027-3 ↗