Fabrication of nanopowders by high energy ball milling and low temperature sintering of Mg2SiO4 microwave dielectrics

Microwave dielectric properties of Mg2TiO4 ceramics synthesized via high energy ball milling method

“…Mechanical activation of MgO-TiO 2 system is not only characterized by crystallite size reduction and increase in dislocation density, but also to promote the mutation formation of new magnesium titanates phases [25,33]. Thus, HEBM is an effective approach to reduce the phase formation temperature, and increasing milling time is commendable for obtaining the pure Mg 2 TiO 4 phase [10,29,20]. Fig.…”

“…For the powders calcined at 1000°C as the HEBM time increased from 10 h to 30 h, the average particle size reduced from 898 to 163 nm. Compared with the conventional solid-state reaction process, HEBM leads to a reduced average particle size and a narrowed size distribution [10,18,30]. Therefore, the MgO-TiO 2 mixtures milled 30 h and calcined at 1000°C was employed to fabricate Mg 2 TiO 4 ceramics.…”

“…The two magnesium titanates are good candidates for use in microwave dielectrics: MgTiO 3 (e c = 13-17, Q Â f = 80,000-200,000 GHz) [2][3][4][5][6]10,11], Mg 2 TiO 4 (e c = 13-14, Q Â f = 150,000 GHz) [7][8][9]. There were a number of methods to synthesize MgTiO 3 ceramics, such as solid state reaction [2], sol-gel [12,13], and chemical-reactive precipitation methods [14].…”

Synthesis of forsterite by periclase and silica gel chlorination

“…[1][2][3] Recently, considerable research attention has been focused on the development of microwave telecommunication technologies because of the increased requirements for microwave applications. 2,4,15 In recent studies, the pyrometallurgic process of chlorination has been successfully used to synthesize ceramic materials from the mixture of oxides or carbonate-silicates, [16][17][18][19] due to the high reactivity of the chlorinating agents and the selectivity of the chlorination reactions. 4 Furthermore, it can be used as a biomaterial for hard tissue repair.…”

Thermal stable microwave dielectric properties of CdWO4 ceramics prepared by high energy ball milling method

“…High energy ball milling (HEBM) method was known as mechanical alloying and has been successfully used as a vehicle for the solid state reaction. As a simple way for preparing nanometer powder, HEBM method is an effect way to low ceramics' sintering temperature [8,9,10].…”