6 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 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.

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.

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.