Influence of mechanical activation and thermal treatment time on nanoparticle forsterite formation mechanism

Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica

“…Forsterite is a crystalline magnesium silicate ceramic with chemical formula Mg 2 SiO 4 , which has a melting point at temperature around 1890 o C, good electrical insulation with value of electrical resistivity is 10 13 -10 15 Ω cm 1 , low thermal expansion, good chemical stability and excellent insulation properties even at high temperatures 2 , and makes its suitable for use in thermal insulation. In addition, forsterite has low dielectric constant ε» 6.8, making this material suitable for dielectric component for wave communication 3 .…”

“…These methods include solid-state reaction [7][8][9][10][11][12] , wet reactions 1,13 and sol-gel [14][15][16][17] . The production of forsterite through the solid-state reaction usually requires high temperature and long reaction time, while the sol-gel process can promote molecule-level of mixing, results in high degree of homogeneity, which leads to reduced temperature and prevention of phase segregation during heating.…”

The Effect of Ball Milling Hours in the Synthesizing Nano-Crystalline Forsterite via Solid-State Reaction

“…However, the manufacture of crystalline forsterite via solid-state reactions accompanied with subsequent heat treatment are often found to lack homogeneity [5,6], and often results in undesirable intermediate phases (i.e. clinoenstatite (MgSiO 3 )) [5].…”

“…clinoenstatite (MgSiO 3 )) [5]. In general, the homogeneity issue of forsterite is often linked to the sluggish formation of silicates since the diffusivity of the formed compounds are relatively low [7].…”

“…Furthermore, MgSiO 3 is often associated as an undesired phase since it is a detrimental element to the high temperature properties of forstertite [8]. To overcome the homogeneity issues of forsterite, researchers have necessitated the involvement of mechanical energy as a mean of refining the powder particle size [5,7], often into nanoparticles whereby documented studies have proved that particles within the nano-meter range were able to boost diffusion process and enhance the chemical reactions between the starting precursors [5]. Additionally, literature also suggests that the refinement of particle size increased the reacting interface of the starting precursors, therefore enhancing the reaction kinetics or the reactants during heat treatment [5].…”