11 results about "Rhombohedron" patented technology

A rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes a rhombohedral zinc orthosilicate (Zn2SiO4) phase, a cubic zinc ferrite (ZnFe2O4) phase, and a hexagonal silicon dioxide (SiO2) phase. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material exhibits a morphology including spherical microscale particles with an average diameter ranging from 0.8 micrometer (μm) to 1.8 μm and irregular nanoscale aggregates with an average diameter ranging from 50 nanometer (nm) to 110 nm. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material has an adsorption capacity for basic fuchsin dye of greater than or equal to 140 milligrams per gram (mg / g). Furthermore, a method for producing the rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes calcination of metal precursors.

This field-effect transistor comprises: a substrate (101) composed of diamond; a p-type channel region (102) formed on the surface of the substrate (101); and a gate insulating layer (103) formed on the p-type channel region (102) and composed of a ferroelectric nitride. The field-effect transistor comprises a source electrode (104) and a drain electrode (105) that are formed on the p-type channel region (102) so as to be apart from each other with the gate insulating layer (103) interposed therebetween. The gate insulating layer (103) is composed of boron nitride (BN) having a (0001) oriented rhombohedral structure (3R structure). The BN having the rhombohedral structure has a crystal structure in which layered structures each composed of six-membered rings consisting of B and N, are stacked.

The application relates to a design method of a layered porous structure of an acetabular cup and the acetabular cup, and the method comprises the following steps: modeling a plurality of rhombohedrons, so that the pore diameter is 500-1200 mu m and the porosity is 60%-90%; generating a cubic array from the rhombohedrons, introducing a simulation calculation software, and performing compression finite element simulation on the cubic array to obtain the compression strength and the elastic modulus of the cubic array; selecting a cubic array meeting the human bone performance, arraying the rhombohedron with the largest pore diameter in the cubic array to obtain an outer porous coating area capable of accommodating the acetabular cup; selecting the rhombohedron with the largest porosity to obtain an inner porous coating area capable of accommodating the acetabular cup; and then performing a Boolean operation on the two array bodies and the outer porous coating area and the inner porous coating area of the acetabular cup respectively to obtain an intersection, so that the layered porous structure of the acetabular cup is finally obtained. The acetabular cup obtained by the method can provide stability after implantation.

Provided is a near-infrared absorbing particle containing cesium tungstate, wherein the cesium tungstate has a pseudo-hexagonal crystal structure selected from one or more of orthorhombic, rhombohedral, and cubic crystals, and the cesium tungstate is represented by the general formula Cs x W y O z It indicates the composition within the area surrounded by four straight lines of x=0.6y, z=2.5y, y=5x and Cs2O:WO3=m:n (m, n are integers) in a ternary composition diagram with Cs, W, and O as vertices.

The invention relates to a method for growing a ferroelectric layer (11) of a rhombohedral ferroelectric alloy on a substrate (10), wherein a growth sublayer (21) formed of a stack of crystalline sheets linked together by van der Waals bonds is arranged on the substrate, and then the rhombohedral crystalline ferroelectric alloy in the form of crystalline grains (12) is deposited onto the growth sublayer at a suitable temperature with a component that segregates between the crystalline grains. Figure for the abstract: Fig. 1.

The invention relates to a method for growing a ferroelectric layer (11) of α-GeTe or a rhombohedral Ge1-xSnxTe alloy on a substrate (10), wherein a growth sublayer (21) formed of a stack of crystalline sheets linked together by van der Waals bonds is arranged on the substrate, and then rhombohedral crystalline α-GeTe or Ge1-xSnxTe in the form of crystalline grains (12) is deposited onto the growth sublayer at a suitable temperature with a component that segregates between the crystalline grains. Figure for the abstract: Fig. 1.

An iron titanium oxide (Fe2TiO5) / iron oxide (Fe1.766O3) / titanium oxide (TiO2) / cobalt iron oxide (CoFe2O4) / carbon (C) nanocomposite material includes orthorhombic Fe2TiO5 phases, rhombohedral Fe1.766O3 phases, tetragonal TiO2 phases and cubic CoFe2O4 phases where the Fe2TiO5 / Fe1.766O3 / TiO2 / CoFe2O4 / C nanocomposite material has a granular morphology including spherical particles having an average particle diameter in a range from 40 to 80 nanometer (nm).

The application discloses a high-crystallinity sodium-rich rhombohedral structure Prussian blue material and a preparation method thereof, and comprises the following steps: S1, preparation of a first precursor solution: uniformly dissolving and mixing transition metal salt, doped active metal salt and a chelating agent to obtain the first precursor solution; S2, preparation of a second precursor solution: dissolving ferrocyanide salt in water to obtain the second precursor solution; S3, preparation of a precursor mixture: injecting the first precursor solution and the second precursor solution into a buffer solution containing inorganic sodium salt and a surfactant, and continuously stirring to obtain the precursor mixture; S4, separation of the Prussian blue material, and the Prussian blue material is obtained; wherein the stoichiometric ratio of the transition metal salt, the doped active metal salt, the ferrocyanide salt and the chelating agent is (5-x):x:5:y, y is greater than or equal to 3, and the value range of x is 0.1-5. The application has the characteristics of high crystallinity, excellent electrochemical performance and controllable process.

Provided are a solid electrolyte excellent in lithium ion conductivity, and a method for producing same.　This solid electrolyte is represented by general formula: XAMBYCPDO12 ± σ, wherein A to D representing molar ratios satisfy a certain relationship, the lattice constant ratio c / a is 2.52 or less, the solid electrolyte has a NASICON-type structure of a rhombohedral crystal system having a lattice volume of 1505 Å3 - 1522 Å3, and the proportion of triclinic structures is reduced as much as possible. The solid electrolyte is produced by: heating a mixture solution to remove moisture, wherein the mixture solution includes a Zr raw material, a Y raw material, a P raw material, and a chelating agent, and the pH of the mixture solution is adjusted to 7.0 or less; firing the mixture in ambient atmosphere to obtain an oxide precursor; adding a Li raw material thereto; and further firing same in ambient atmosphere.

The invention discloses a modulus-controllable bionic gradient porous medical titanium alloy and an additive manufacturing process method thereof, and relates to the technical field of medical materials.The titanium alloy is formed by stacking a plurality of rhombic dodecahedron structures in the vertical direction; the rhombic dodecahedron structure is formed by stacking a plurality of rhombic dodecahedron structure layers with the same area, and each rhombic dodecahedron structure layer is formed by arranging a plurality of rhombic dodecahedron unit cell structures in an array mode in the same horizontal plane. And the top distances of the rhombic dodecahedron unit cell structures in the rhombic dodecahedron structures from top to bottom are sequentially increased. The elastic modulus can be effectively reduced to 0.14-0.43 GPa, the elastic modulus of the whole structure can be accurately controlled, and the stress shielding effect of the bone graft is relieved.

Provided are a solid electrolyte having excellent lithium ion conductivity and a method for producing the same.　Specifically provided is a solid electrolyte which includes a rhombohedral NASICON-type structure represented by the general formula XAZrBYCPDO12±σ, where A to D, which indicate molar ratios, satisfy a prescribed relationship, the lattice constant ratio c / a is no more than 2.52, and the lattice volume is 1,505-1,522 Å3, and in which a substance having a triclinic crystal structure is included in a prescribed proportion relative to the rhombohedral NASICON-type structure. When obtaining the solid electrolyte, a mixed solution containing a Zr raw material, a Y raw material, a P raw material, and a chelating agent and prepared at a pH of no more than 7.0 is heated to remove moisture, the mixed solution is fired in an air atmosphere to obtain an oxide precursor, and a Li raw material is added thereto and further fired in an air atmosphere to produce the solid electrolyte.