Abstract: This application provides Fe—Mn—Al—C lightweight steel, including: Fe, wherein a weight percentage of the Fe is greater than or equal to 50.4 wt %; Mn, wherein a weight percentage of the Mn is 25-35 wt %; Al, wherein a weight percentage of the Al is 6-12 wt %; C, wherein a weight percentage of the C is 0.8-2.0 wt %; and O, wherein a weight percentage of the O is 0.005-0.6 wt %. This application further provides a terminal to which the Fe—Mn—Al—C lightweight steel is applied, a production method for the Fe—Mn—Al—C lightweight steel, a steel mechanical part, and an electronic device. The lightweight steel in this application has low density, high strength, and high elongation.

Abstract: The invention provides a supramolecular polymer composition capable of co-assembly to maintain a three dimensional (3-D) macrostructural form after 3-D printing, made of a solvent, a template molecule; and a reactive component. The reactive component can be at least one monomer that is capable of hydrogen bonding with the template molecule to form a 1D supramolecular structure. The template may be an amphiphilic polymer. The monomer has at least two pendant groups capable of covalent crosslinking. The invention also includes a 3-D structure formed by crosslinking a 3-D printed supramolecular polymer composition, which optionally has a mesoporous structure. Also included is a method of manufacturing a 3-D structure by delivering a supramolecular polymer composition onto a surface of a substrate to form the 3-D structure.

Abstract: Embodiments of the present disclosure pertain to a composition that includes a rotaxane. The rotaxane includes a plurality of macrocyclic rings and a polymer with a molecular weight below 10,000 Da that is covalently appended to one or more sterically hindered molecules. The cavities of the macrocyclic rings are threaded onto the polymer. The plurality of threaded macrocyclic rings include a plurality of different segments that each include a plurality of threaded macrocyclic rings. Each of the plurality of different segments is in the form of a crystalline network. Further embodiments of the present disclosure pertain to methods of forming the rotaxanes by covalently appending one or more sterically hindered molecules onto a polymer and threading a plurality of macrocyclic rings onto the polymer. Additional embodiments of the present disclosure pertain to methods of manufacturing a three-dimensional structure by applying a composition of the present disclosure onto a surface.

Abstract: This application relates to lightweight steels, preparation methods thereof, and steel structural parts and electronic devices that use the lightweight steel. An example light weight steal includes: Fe, in a percentage by weight greater than or equal to 48.18 wt %; Mn, in a percentage by weight of 30.01 wt % to 35.01 wt %; Al, in a percentage by weight of 12.01 wt % to 15.01 wt %; C, in a percentage by weight of 1.0 wt % to 1.5 wt %; and O, in a percentage by weight of 0.03 wt % to 0.3 wt %. This application further provides a steel structural part, an electronic device that use the lightweight steel, and a preparation method of the lightweight steel.

Abstract: The present disclosure relates to a steel, a steel structural part, an electronic device, and a steel structural part preparation method. An example steel includes Fe with a weight percentage of ?60.67 wt %, Cr with a weight percentage of 8.01 wt % to 8.99 wt %, Ni with a weight percentage of 6 wt % to 7 wt %, Co with a weight percentage of 15.01 wt % to 15.99 wt %, Mo with a weight percentage of 5.5 wt % to 6.5 wt %, Nb with a weight percentage of ?0.5 wt %, O with a weight percentage of ?0.3 wt %, and C with a weight percentage of ?0.05 wt %.

Abstract: An ECG electrode is provided. The ECG electrode includes an electrode substrate and a doped graphite-like carbon film located on an outer surface of the electrode substrate. The doped graphite-like carbon film includes graphite-like carbon, and first nano-crystals and second nano-crystals that are embedded in the graphite-like carbon. The first nano-crystal includes a weak carbon-bonding element. The weak carbon-bonding element has a part that exists in a form of a metallic elementary substance. The first nano-crystal includes a columnar structure. The columnar structure extends in a thickness direction of the doped graphite-like carbon film. The second nano-crystal includes a strong carbon-bonding element. The strong carbon-bonding element bonds with the carbon element in the graphite-like carbon through a chemical bond. The second nano-crystals are distributed between adjacent and spaced columnar structures.

Abstract: The invention provides a supramolecular polymer composition capable of co-assembly to maintain a three dimensional (3-D) macrostructural form after 3-D printing, made of a solvent, a template molecule; and a reactive component. The reactive component can be at least one monomer that is capable of hydrogen bonding with the template molecule to form a 1D supramolecular structure. The template may be an amphiphilic polymer. The monomer has at least two pendant groups capable of covalent crosslinking. The invention also includes a 3-D structure formed by crosslinking a 3-D printed supramolecular polymer composition, which optionally has a mesoporous structure. Also included is a method of manufacturing a 3-D structure by delivering a supramolecular polymer composition onto a surface of a substrate to form the 3-D structure.

Abstract: The invention provides a supramolecular polymer composition capable of co-assembly to maintain a three dimensional (3-D) macrostructural form after 3-D printing, made of a solvent, a template molecule; and a reactive component. The reactive component can be at least one monomer that is capable of hydrogen bonding with the template molecule to form a 1D supramolecular structure. The template may be an amphiphilic polymer. The monomer has at least two pendant groups capable of covalent crosslinking. The invention also includes a 3-D structure formed by crosslinking a 3-D printed supramolecular polymer composition, which optionally has a mesoporous structure. Also included is a method of manufacturing a 3-D structure by delivering a supramolecular polymer composition onto a surface of a substrate to form the 3-D structure.

Abstract: This application provides Fe—Mn—Al—C lightweight steel, including: Fe, wherein a weight percentage of the Fe is greater than or equal to 50.4 wt %; Mn, wherein a weight percentage of the Mn is 25-35 wt %; Al, wherein a weight percentage of the Al is 6-12 wt %; C, wherein a weight percentage of the C is 0.8-2.0 wt %; and O, wherein a weight percentage of the O is 0.005-0.6 wt %. This application further provides a terminal to which the Fe—Mn—Al—C lightweight steel is applied, a production method for the Fe—Mn—Al—C lightweight steel, a steel mechanical part, and an electronic device. The lightweight steel in this application has low density, high strength, and high elongation.

Abstract: Embodiments of the present disclosure pertain to a composition that includes a rotaxane. The rotaxane includes a plurality of macrocyclic rings and a polymer with a molecular weight below 10,000 Da that is covalently appended to one or more sterically hindered molecules. The cavities of the macrocyclic rings are threaded onto the polymer. The plurality of threaded macrocyclic rings include a plurality of different segments that each include a plurality of threaded macrocyclic rings. Each of the plurality of different segments is in the form of a crystalline network. Further embodiments of the present disclosure pertain to methods of forming the rotaxanes by covalently appending one or more sterically hindered molecules onto a polymer and threading a plurality of macrocyclic rings onto the polymer. Additional embodiments of the present disclosure pertain to methods of manufacturing a three-dimensional structure by applying a composition of the present disclosure onto a surface.

Abstract: A heat conducting part is provided. The heat conducting part includes a shell, including an inner layer and an outer layer, where a cavity is enclosed by the inner layer, and the outer layer wraps a periphery of the inner layer; a capillary structure, disposed in the cavity and abutting against the shell; and cooling liquid, located in the cavity, where the inner layer and the outer layer are made of different materials, and a material density of the outer layer is lower than a material density of the inner layer. In the heat conducting part provided in this application, a material with a relatively large density and a stable chemical property may be selected for the inner layer to ensure durability of the heat conducting part.

Abstract: The invention provides a supramolecular polymer composition capable of co-assembly to maintain a three dimensional (3-D) macrostructural form after 3-D printing, made of a solvent, a template molecule; and a reactive component. The reactive component can be at least one monomer that is capable of hydrogen bonding with the template molecule to form a 1D supramolecular structure. The template may be an amphiphilic polymer. The monomer has at least two pendant groups capable of covalent crosslinking. The invention also includes a 3-D structure formed by crosslinking a 3-D printed supramolecular polymer composition, which optionally has a mesoporous structure. Also included is a method of manufacturing a 3-D structure by delivering a supramolecular polymer composition onto a surface of a substrate to form the 3-D structure.

Abstract: Embodiments of the present disclosure provide a middle frame member including: a middle frame substrate body; a first metal layer, attached to a first area of the middle frame substrate body, where a coefficient of heat conductivity of the first metal layer is greater than a coefficient of heat conductivity of the middle frame substrate body, the first area includes all or a part of an outer surface of the middle frame substrate body, and the first metal layer is used to conduct, to the entire first metal and the middle frame substrate body, heat generated by at least one of the components that is in contact with or adjacent to the first metal layer; and a passivated insulation layer, attached to a surface of the first metal layer.

Abstract: Embodiments of the present disclosure provide a middle frame member including: a middle frame substrate body; a first metal layer, attached to a first area of the middle frame substrate body, where a coefficient of heat conductivity of the first metal layer is greater than a coefficient of heat conductivity of the middle frame substrate body, the first area includes all or a part of an outer surface of the middle frame substrate body, and the first metal layer is used to conduct, to the entire first metal and the middle frame substrate body, heat generated by at least one of the components that is in contact with or adjacent to the first metal layer; and a passivated insulation layer, attached to a surface of the first metal layer.