Disclosed are electrochemical devices, such as lithium battery electrodes, lithium ion conducting solid-state electrolytes, and solid-state lithium metal batteries including these electrodes and solid-state electrolytes. In one disclosed method, a solid state electrolyte material including a precursor layer having a first electronic conductivity is provided; and the precursor layer on the solid state electrolyte material is reduced to an interfacial layer having a second electronic conductivity greater than the first electronic conductivity. Also disclosed is a method of forming a solid state electrolyte for an electrochemical device including an anode comprising an electrochemically active metal, wherein the method comprises providing a solid state electrolyte material, and depositing an interfacial layer comprising a first metal on the surface of the solid state electrolyte material, wherein the electrochemically active metal does not form an alloy with the first metal during cycling or formation of the electrochemical device.

A composite ceramic including: a lithium garnet major phase; and a grain growth inhibitor minor phase, as defined herein. Also disclosed is a method of making composite ceramic, pellets and tapes thereof, a solid electrolyte, and an electrochemical device including the solid electrolyte, as defined herein.

Provided are a barium germanium oxide having a 3-4 eV band gap, a method for producing the same, a sintered body thereof, and a target thereof. The barium germanium oxide includes at least Ba, Ge, and O, includes a crystal represented by a general formula of ABO.sub.3 (here, A includes at least Ba and B includes at least Ge), and has a hexagonal 6H-type perovskite structure.

A 3D printing system includes a build material and an ink for patterning portions of the build material. The printing system further includes two or more susceptors, a first susceptor and a second susceptor. The first susceptor causes heating when exposed to microwave radiation at a first temperature. The second susceptor causes heating when exposed to microwave radiation at a second temperature. The first susceptor material is decomposable or oxidizable at a third temperature that is higher than the second temperature. The second susceptor is transparent to microwave radiation at the first temperature.

A dielectric composition comprising a main component expressed by a chemical formula of (A.sub.6-xB.sub.xC.sub.x+2D.sub.8-xO.sub.30, 0x5), wherein said A component is at least one element selected form the group consisting of Ba, Ca, and Sr, said B component is at least one element selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, said C component is at least one element selected from the group consisting of Ti, and Zr, said D component is at least one element selected from the group consisting of Nb, and Ta, and said dielectric composition comprises 2.50 mol or more and 20.00 mol or less of an oxide of Ge as a first sub component with respect to 100 mol of said main component.

A superconducting composition of matter including overlapping first and second regions. The regions comprise unit cells of a solid, the first region comprises an electrical insulator or semiconductor, and the second region comprises a metallic electrical conductor. The second region extends through the solid and a subset of said second region comprise surface metal unit cells that are adjacent to at least one unit cell from the first region. The ratio of the number of said surface metal unit cells to the total number of unit cells in the second region being at least 20 percent.

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase strontium hexagonal ferrite material. In some embodiments, sodium can be added into the crystal structure of the hexagonal ferrite material in order to achieve high resonance frequencies while maintaining high permeability.

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material, such as Y-phase hexagonal ferrite material, and methods of manufacturing. In some embodiments, sodium or potassium can be added into the crystal structure of the hexagonal ferrite material in order to achieve improved resonant frequencies in the range of 500 MHz to 1 GHz useful for radiofrequency applications.

Ceramics and glass-ceramics have low and/or negative coefficients of thermal expansion. Crystalline phases of the formula AM.sub.2Si.sub.2-yGe.sub.yO.sub.7 (A=Sr and Ba and M=Zn, Mg, Ni, Co, Fe, Cu, Mn, with Sr, Ba and Zn necessarily having to be present) can be produced by conventional ceramic processes or by crystallization from glasses. The compositions form solid solutions, where the elements indicated as component M can be replaced by one another in virtually any concentration but the concentration of Zn must always be at least 50% of the sum of all components indicated under M. The stoichiometry of these silicates and also their structure can differ to a greater or lesser extent.

Methods of manufacturing a ceramic honeycomb body having a honeycomb structure with a matrix of intersecting walls, and a skin disposed on an outer peripheral portion of the matrix where the skin has a first average porosity and the interior portion of the matrix has a second average porosity greater than the first average porosity. The methods include coating at least the skin with a fluid formulation containing a sintering aid and subsequently firing the honeycomb structure. In certain embodiments, a glass layer is formed in the skin or in regions of the walls directly adjacent to the skin. In certain embodiments, the coating is applied to a green honeycomb body, and in other embodiments the coating is applied to a ceramic honeycomb body. Other honeycomb bodies and methods are described.