The gelcasting preparation of high-performance porous Si3N4 ceramics by merely increasing monomer content in the slurry without other organic additives was presented, and the influences of monomer content and the ratio of monomers on gelcasting preparation of porous Si3N4 ceramics were investigated. The results suggest that monomer content and the ratio of monomers have great influences on the performances of green body and sintered body of porous Si3N4 ceramics, and the warpage and shrinkage of green body can be effectively improved by selecting reasonable the ratio of monomers. High-performance sintered body was achieved by high-performance green body. The pore size of porous Si3N4 ceramics is less than 1 μm, and the flexural strength and porosity are above 130 MPa and above 50%, respectively.

Gelcasting preparation of porous silicon nitride ceramics by adjusting the content of monomers

Effect of monomer content on physical properties of silicon nitride ceramic green body prepared by gelcasting

Mechanical and dielectric properties of gelcasted Si3N4 porous ceramic using CaHPO4 as an additive

Effect of solid contents on the mechanical properties of SiC–10 wt.%AlN ceramic composites prepared by gelcasting

Zeolites are aluminosilicates of frame structure and they constitute fresh rocks coming from the transformations of the volcanic glasses. In Cuba different zeolite manifestations of importance exist highlighting among them that of the location “Tasajeras”, in the central province of Cuba. The lack of feldspar of appropriate quality for the glass industry has served from stimulus to the realization of this work. The reactions of formation of silicates were analyzed using thermal studies and comparative the traditional glass with feldspar results and the zeolite dates, being discussed its particularities later on. The specificities of the physical–chemical behavior of the mixtures vitrificables allow to infer improvements during the trial in the processes of elaboration of the glass and sensitive energy savings industrial.

https://dialnet.unirioja.es/descarga/articulo/2576989.pdf

M. E. Zayas

Papers

Modified zeolite increases chemical resistance of bottle glass