Porous mullite ceramics with a fully closed-cell structure fabricated by direct coagulation casting using fly ash hollow spheres/kaolin suspension

Caracterización de partículas metálicas extraídas de cenizas volantes de una planta termoeléctrica de Boyacá-Colombia

“…These elements may correspond to aluminosilicate compounds. These results coincide with research reported by Chen et al [19]. Source: authors.…”

“…as reported by Kutchko et al [20]. This means that this type of particle has a considerable amount of Si and Al, in accordance with the morphology and as reported in [11], [12], [19]. The structural and mineralogical analysis performed by XRD is shown in Figure 4.…”

Determination of effective stiffness properties of multilayered composite beams

“…The vector n = n α e α is the outward unit normal to ∂Σ . The tensor components t βα which appear in (12) are given by t 11 = c 11 u 1,1 + c 12 u 2,2 , t 22 = c 12 u 1,1 + c 22 u 2,2 , and t 12 = c 66 (u 1,2 + u 2,1 ). Further, the so-called torsion function ϕ(x 1 , x 2 ) is determined by the boundary-value problem…”

“…Modern composites with different polymer, ceramic [6,12,16,26,31,37,40,43,44,46], cement or metal matrix [13,16,36,41,50] are the most promising kinds of materials used for various branches of innovative industry. The natural composites have disordered internal structures, whereas novel multiphase materials are designed to satisfy specific engineering requirements.…”

Experimental and numerical studies on freezing of droplets under effects of nanoparticles and magnetic fields

“…Both dense and porous ceramics have been investigated in studies on ice-templating. Icetemplated materials, such as alumina [18], mullite [158], zirconia [159], titania [160], and silicon nitride [161], exhibit excellent mechanical and thermal properties. When using the (Al2W3O12) and poly(methylmethacrylate) has been developed by Ellis et al [163].…”