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Materials Data on MnZn by Materials Project
MnZn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Mn is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. All Mn–Zn bond lengths are 2.60 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Mn atoms.
Materials Data on MnZn by Materials Project
MnZn is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Mn is bonded to six equivalent Mn and six equivalent Zn atoms to form MnMn6Zn6 cuboctahedra that share corners with eighteen equivalent MnMn6Zn6 cuboctahedra, edges with six equivalent MnMn6Zn6 cuboctahedra, edges with twelve equivalent ZnMn6Zn6 cuboctahedra, faces with eight equivalent MnMn6Zn6 cuboctahedra, and faces with twelve equivalent ZnMn6Zn6 cuboctahedra. All Mn–Mn bond lengths are 2.64 Å. All Mn–Zn bond lengths are 2.68 Å. Zn is bonded to six equivalent Mn and six equivalent Zn atoms to form ZnMn6Zn6 cuboctahedra that share corners with eighteen equivalent ZnMn6Zn6 cuboctahedra, edges with six equivalent ZnMn6Zn6 cuboctahedra, edges with twelve equivalent MnMn6Zn6 cuboctahedra, faces with eight equivalent ZnMn6Zn6 cuboctahedra, and faces with twelve equivalent MnMn6Zn6 cuboctahedra. All Zn–Zn bond lengths are 2.64 Å.
Materials Data on MnZn(CrS2)4 by Materials Project
MnZn(CrS2)4 is Spinel-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Cr3+ is bonded to six S2- atoms to form CrS6 octahedra that share corners with three equivalent MnS4 tetrahedra, corners with three equivalent ZnS4 tetrahedra, and edges with six equivalent CrS6 octahedra. All Cr–S bond lengths are 2.42 Å. Mn2+ is bonded to four equivalent S2- atoms to form MnS4 tetrahedra that share corners with twelve equivalent CrS6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Mn–S bond lengths are 2.37 Å. Zn2+ is bonded to four equivalent S2- atoms to form ZnS4 tetrahedra that share corners with twelve equivalent CrS6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Zn–S bond lengths are 2.37 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded to three equivalent Cr3+ and one Mn2+ atom to form a mixture of distorted edge and corner-sharing SMnCr3 trigonal pyramids. In the second S2- site, S2- is bonded to three equivalent Cr3+ and one Zn2+ atom to form distorted SZnCr3 trigonal pyramids that share corners with twelve SMnCr3 trigonal pyramids and edges with three equivalent SZnCr3 trigonal pyramids.
Materials Data on MnZn(FeO2)4 by Materials Project
MnZn(FeO2)4 is Spinel-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Mn2+ is bonded to four equivalent O2- atoms to form MnO4 tetrahedra that share corners with twelve equivalent FeO6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Mn–O bond lengths are 2.04 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with three equivalent MnO4 tetrahedra, corners with three equivalent ZnO4 tetrahedra, and edges with six equivalent FeO6 octahedra. There are three shorter (2.04 Å) and three longer (2.06 Å) Fe–O bond lengths. Zn2+ is bonded to four equivalent O2- atoms to form ZnO4 tetrahedra that share corners with twelve equivalent FeO6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Zn–O bond lengths are 2.01 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to one Mn2+ and three equivalent Fe3+ atoms to form a mixture of distorted edge and corner-sharing OMnFe3 trigonal pyramids. In the second O2- site, O2- is bonded to three equivalent Fe3+ and one Zn2+ atom to form distorted OZnFe3 trigonal pyramids that share corners with twelve OMnFe3 trigonal pyramids and edges with three equivalent OZnFe3 trigonal pyramids.
Materials Data on MnZn(GeO3)2 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
Materials Data on MnZn(SiO3)2 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
Encapsulation Residual Stress and Ferrite Loss in Inductive Coil Assemblies
As inductive wireless charging reaches higher power levels, thermal management and mechanical durability become more critical. To address these concerns, past works have demonstrated the benefit of encapsulating coil assemblies in thermally conductive materials. However, due to the sensitivity of the MnZn ferrites commonly used in coil assemblies to mechanical stress, care must be taken to avoid creating large stresses in the ferrite that cause higher hysteresis loss. The stress formation in the encapsulant curing process is overviewed and modeled and an experiment is performed to demonstrate the effect in a small-scale coil assembly. Finally, the effect is shown in the reduced coil-coil efficiency of a first generation high power inductive power transfer prototype using a stiff epoxy compared to better performance in a second prototype using a softer thermally-conductive silicone encapsulant.
Design, Fabrication, and Characterization of UHF Ferrite Hybrid Absorbers
The is a poster on the fabrication and characterization of NiZn and MnZn ferrites for ultra-high frequency (UHF) RF absorbers. This will be presented at the American Ceramic Society EMA 2025 conference.