A method for manufacturing a fibrous tubular structure including lobes, in which fibers are draped/deposited on a mandrel having a shape corresponding to that of the fibrous structure, includes draping/deposition carried out such that at least one group of fibers has a same orientation with respect to the axis (A) of said fibrous structure, then, the fibers having been draped over an angular sector less than the total periphery of the mandrel, one of the ends of the fibrous structure is separated from the mandrel in order to allow the continuation of the draping on the same mandrel.

An exemplary embodiment of the present disclosure provides a method for manufacturing a transparent ceramic material. The method comprises providing a compact comprising a metal oxide and, during sintering, exposing the compact to a vapor comprising one of or both fluorine ions and lithium ions to form a transparent ceramic material comprising at least 90% of a theoretical transparency.

An oxide ion conductor has a X.sub.3Z.sub.2(TO.sub.4).sub.3 structure, where X is a divalent metal element, Z is a trivalent metal element, and T is a tetravalent metal element, and has a composition expressed by (X.sub.1-xA.sub.x).sub.3(Z.sub.1-yB.sub.y).sub.2(T.sub.1-zC.sub.z).sub.3O.sub.12+δ where the element X is Ca, Fe, Gd, Ba, Sr, Mn, and/or Mg, the element Z is Al, Cr, Fe, Mn, V, Ga, Co, Ni, Ru, Rh, and/or Ir, the element T is Si and/or Ge, an element A is La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and/or Sr, an element B is Zn, Mn, Co, Ru, and/or Rh, and an element C is Si, Al, Ga, and/or Sn, 0≤x≤0.2, 0≤y≤0.2, and 0≤z≤0.2 are satisfied, and δ is a value securing electrical neutrality.

The present invention relates to a suspension comprising 50-95% by weight of the total suspension (w/w) of at least one metallic material and/or ceramic material and/or polymeric material and/or solid carbon containing material; and at least 5% by weight of the total suspension of one or more fatty acids or derivatives thereof. In addition, the invention relates to uses of such suspension in 3D printing processes.

The present invention relates to a suspension comprising 50-95% by weight of the total suspension (w/w) of at least one metallic material and/or ceramic material and/or polymeric material and/or solid carbon containing material; and at least 5% by weight of the total suspension of one or more fatty acids or derivatives thereof. In addition, the invention relates to uses of such suspension in 3D printing processes.

Methods for producing the amorphous metal oxide semiconductor layer where amorphous metal oxide semiconductor layer is formed by use of a precursor composition containing a metal salt, a primary amide, and a water-based solution. The methodology for producing the amorphous metal oxide semiconductor layer includes applying the precursor composition onto a substrate to form a precursor film, and firing the film at a temperature of 150° C. or higher and lower than 300° C.

Methods for producing the amorphous metal oxide semiconductor layer where amorphous metal oxide semiconductor layer is formed by use of a precursor composition containing a metal salt, a primary amide, and a water-based solution. The methodology for producing the amorphous metal oxide semiconductor layer includes applying the precursor composition onto a substrate to form a precursor film, and firing the film at a temperature of 150° C. or higher and lower than 300° C.

A Li.sub.3Mg.sub.2SbO.sub.6-based microwave dielectric ceramic material easy to sinter and with high Q value, and a preparation method thereof are disclosed. A chemical formula of the material is Li.sub.3(Mg.sub.1-xZn.sub.x).sub.2SbO.sub.6, wherein 0.02≤x≤0.08. The preparation method includes: 1) mixing and ball-milling Sb.sub.2O.sub.3 and Li.sub.2CO.sub.3 according to a chemical ratio and then drying, and conducting pre-sintering to obtain a Li.sub.3SbO.sub.4 phase; and 2) mixing and ball-milling MgO, ZnO and Li.sub.3SbO.sub.4 powder according a chemical ratio of Li.sub.3(Mg.sub.1-xZn.sub.x).sub.2SbO.sub.6 and then drying, conducting granulation and sieving after adding an adhesive, pressing into a cylindrical body, and sintering the cylindrical body into ceramic in the air at 1325° C. and under normal pressure, wherein a dielectric constant is 7.2-8.5, a quality factor is 51844-97719 GHz, and a temperature coefficient of resonance frequency is −14-1 ppm/° C.

The present disclosure relates to a negative temperature coefficient product comprising an electrically conductive percolation network of printable NTC material as particles in a cross-linked dielectric polymer matrix and to a method of manufacturing thereof. The particles comprising a spinel phase, preferably a C-spinel phase, having a general formula M.sub.3O.sub.4 comprising at least a first metal M.sup.I that is manganese and second metal M.sup.II that is nickel. In addition the particles include a nickel oxide phase. The printable NTC material can be dispersed in a printable NTC ink comprising a dispersant, from which the NTC product, e.g. a thermistor, can be formed, e.g., after drying of the dispersant. During processing the ink is kept at a temperature below 300° C. Optionally, the spinel phase comprises a further metal M.sup.III. The weight fraction of nickel oxide with respect to the overall mass of the printable NTC material is preferably in a range between one and twenty weight percent.

The present invention relates to solvothermal vapor synthesis methods for the crystallization of a phase from a mixture of selected inorganic or organic precursors in an unsaturated vapor-phase reaction medium.