Comparative study of microwave and conventional processing of MgAl2O4-based materials

Stabilization and phase transformation of CuFe2O4 sintered from simulated copper-laden sludge

“…Spinel provides advantages of no permeability for liquid and gas, low thermal conductibility, high chemical resistibility, and its Mohs Hardness is equal to 8 [9]. For the characteristics of spinel materials, they are widely used as refractory materials employed in the glass and steel industries [10][11][12], and as a potential candidate material for internal reforming solid oxide fuel cell anodes [13].…”

Influence of 8-hydroxyquinoline on properties of anodic coatings obtained by micro arc oxidation on AZ91 magnesium alloys

“…In addition, because of excellent thermal stability and photoluminescence property, Mg(HQ) 2 has been considered to be a good luminescence material [37]. In the solutions of 5Q-18Si and 8Q-18Si, MgAl 2 O 4 is formed by the reaction between magnesium oxide (MgO) and aluminum oxide (Al 2 O 3 ) [36]. The reason may be that in these solutions, the final voltage is very high because of low conductivity (Fig.…”

“…During MAO process, anions in the solution such as C 9 H 6 NO À , OH À and SiO 2À 3 move toward the anode under the electric field and enter into anodic coatings. Therefore, in the solution containing 8-HQ, the following reactions normally occur on the anode surface [28,31,[34][35][36]:…”

Prospects of microwave processing: An overview

“…MgAl 2 O 4 spinel was also obtained through the solid state reaction between magnesium oxide (MgO) and aluminium oxide (Al 2 O 3 ) along with 1 wt.% of CaO as an additive at about 1400 o C for ~ 4 min (c.f. conventional route: 96 h at 1400°C, Gómez et al 2004). This novel process helped to synthesize β-SiAlON within only 15 min at 1500°C (Mathis et al 1995b).…”