Sintering behavior and microwave dielectric properties of CaMgSi2O6 ceramics with Al2O3 addition

Low‐temperature sintering of microwave ceramics with high Qf values through LiF addition

“…Moreover, comparing with the LiF‐free CaMgSi 2 O 6 sintered at 1250°C, moderate LiF additive is able to produce higher Qf values with lower sintering temperatures. Figure D,E show a comparison of the Qf values and sintering temperatures of CaMgSi 2 O 6 ‐based and Mg 2 SiO 4 ‐based materials . With help of the LiF addition, high Qf values were successfully obtained in CaMgSi 2 O 6 and Mg 2 SiO 4 ceramics with a low‐sintering temperature.…”

Exploring the underlying mechanisms behind the increased far infrared radiation properties of perovskite-type Ce/Mn co-doped ceramics

“…Mn, Ce combine with oxygen to generate the complicated solid solution, forming a semi-coherent interface with perovskite-type phase [16], so that the peak splitting appears in the XRD pattern of M1. With the increase of Mn dopant, the diffraction peaks become sharper gradually from M1 to M4, implying a good crystallinity [17,18]. Further, the representative 2θ ranges from 30 to 50° are magnified in Fig.…”

Effect of rare earth Ce on the far infrared radiation property of iron ore tailings ceramics

“…Diopside (CaMg[Si 2 O 6 ]) belongs to the monoclinic system [43], of which two top angles of [SiO 4 ] tetrahedrons connect to a single chain, extending parallel to the c-axis [44]. In the middle of the chain, there are some chains linked by regular octahedron and irregular polyhedron, where the octahedron is constituted by smaller cation M 1 (Mg, six coordination), and the polyhedron by larger cation M 2 (Ca, eight coordination) [45,46]. During the sintering process, Fe gradually replaced Mg and Si to form iron diopside (Ca 0.991 (Mg 0.641 Fe 0.342 )(Si 1.6 Fe 0.417 ) 0 6 ).…”