7results about How to "Improve thermal compatibility" patented technology

The invention discloses a solid oxide fuel cell cathode and a manufacturing process thereof. A cathode intermediate layer is a rare earth oxide doped material; the cathode body comprises a plurality of cathode points which are combined on the cathode middle layer and are distributed discretely, and each cathode point comprises a plurality of cathode point layers which are combined in the thickness direction; according to the cathode of the solid oxide fuel cell and the manufacturing process of the cathode, the thermal stress difference between the cathode body and the electrolyte layer during temperature change is buffered through the proper thermal expansion characteristic of the cathode intermediate layer, the cathode body comprises the cathode points which are distributed discretely, and in the thermal cycle process, due to the fact that the surface of the cathode body is extremely small, the thermal conductivity of the cathode body is greatly improved. The total deformation quantity caused by thermal expansion is greatly reduced, and the phenomenon that the cathode layer is violently deformed on the interface of the electrolyte layer is avoided. Compared with a traditional electrode-electrolyte layer interface, interface spallation caused by thermal stress deformation can be greatly reduced, and the thermal matching performance of the cathode layer and the electrolyte layer is greatly improved.

The application discloses a preparation process of a high-performance Cu-Ni-Fe alloy based on first-principle calculation design, and relates to the technical field of alloy material preparation. The process constructs a precise Cu-Ni-Fe ternary alloy thermodynamic database by combining a first principle with a CALPHAD method, determines a composition range based on database calculation of a multivariate phase diagram, optimizes the composition by calculating a work function, an elastic constant and a thermal expansion coefficient through a first principle, and obtains a finished product through smelting, heat treatment and forming processing. The final alloy has an atomic percentage composition of Cu 30%-75%, Ni 10%-30% and Fe 10%-30%, a tensile strength of greater than or equal to 816.4 MPa, a total elongation at break of greater than or equal to 34.27%, and a thermal expansion coefficient of less than 20*10 ‑6 / K, and has excellent mechanical properties and thermal stability, thereby solving the problems of blind composition design and large performance fluctuation of a traditional process and being suitable for multiple fields such as ocean engineering and electronic packaging.

The invention discloses a high-strength impact-resistant glass product and a preparation method of the high-strength impact-resistant glass product in the field of glass, and the high-strength impact-resistant glass product comprises the following raw materials in parts by weight: 50-60 parts of SiO2; 10 to 15 parts of Al2O3; 5 to 8 parts of Li2O; 1 to 3 parts of Na2O; 0.5 to 1.5 parts of K2O; 2 to 5 parts of P2O5; 2 to 4 parts of ZrO2; 1 to 3 parts of TiO2; 1 to 2 parts of B2O3; 0.5 to 2 parts of rare earth oxide; 4 to 12 parts of modified SiC particles; and 1 to 3 parts of modified MoAlB particles. The modified SiC particles and the modified MoAlB particles are adopted as a double-phase reinforcing system, the thermal matching performance with a glass matrix is enhanced, and the strength and toughness of the final glass product are greatly improved under the assistance of the structural densification effect of the rare earth oxide.

The invention belongs to the technical field of composite materials, and particularly relates to high-temperature-resistant conductive connection brazing filler metal and a preparation method and application thereof. The high-temperature-resistant conductive connection brazing filler metal comprises the following raw materials in percentage by mass: 60%-70% of silver powder, 5%-13% of titanium powder, 10%-20% of copper powder and 5%-17% of a precursor solution. According to the method, the Ag-Cu-Ti solder and the silicon-based precursor are mixed, the fluidity and wettability of the solder can be guaranteed at the same time, and metal-ceramic-based composite material connection under the non-pressure condition is achieved. By using the metal and ceramic mixed brazing filler metal, the thermal matching property of the metal and the ceramic matrix composite material can be improved, the obtained connection effect is remarkable, and meanwhile the high-temperature-resistant characteristic, the high-temperature connection characteristic and the high-temperature conductive characteristic are guaranteed.

The invention discloses modified halide perovskite and a direct X-ray large-area imaging device and method based on the modified halide perovskite, and belongs to the technical field of halide perovskite preparation. According to the modified halide perovskite disclosed by the invention, the polymer material is added into the target perovskite for modification, the added polymer material such as hydroxy propyl cellulose and carboxymethyl cellulose effectively reduces the volume expansion of the target perovskite, and through the mechanism, the volume expansion of the target perovskite is reduced; due to the introduction of the polymer material, the thermal expansion coefficient of the perovskite layer is effectively reduced, the direct thermal expansion difference between the perovskite layer and the substrate material is reduced, and the residual thermal stress of the modified perovskite material is effectively reduced.

The invention provides a method for preparing a surface coating on a heat insulation tile, and belongs to the field of heat insulation tiles. The method for preparing the surface coating on the heat insulation tile comprises the following steps of preparing a first spraying material, preparing a second spraying material, performing primary surface treatment and performing secondary surface treatment. According to the method for preparing the surface coating on the heat insulation tile, the defects that an existing heat insulation tile is large in brittleness, not resistant to high-speed airflow scouring and low in damage tolerance can be overcome, meanwhile, the compatibility of a heat insulation tile base body and the surface coating of the heat insulation tile base body is improved, the bonding performance of the surface coating and the heat insulation tile base body is improved, and the durability of the surface coating of the heat insulation tile is improved; the effective service life is prolonged; meanwhile, the stability of the surface coating of the heat insulation tile is improved, the heat matching performance of the surface coating and the heat insulation tile base body is improved, and the problems of warping, deformation and falling of the surface coating of the heat insulation tile in the working environment of rapid heating and cooling are solved.

The invention belongs to the field of preparation of soft magnetic materials, and discloses metal soft magnetic powder, a surface insulation modification method of the metal soft magnetic powder and a soft magnetic composite material. The surface insulation modification method of the metal soft magnetic powder comprises the following steps: (1) dispersing boehmite powder in a solvent to prepare boehmite precursor sol; and (2) the boehmite precursor sol and metal soft magnetic powder are mixed, then heating evaporation is conducted till a solvent is completely volatilized, the amorphous Al2O3 coated metal soft magnetic powder is prepared, and the heating temperature ranges from 50 DEG C to 80 DEG C. According to the amorphous Al2O3 coated metal soft magnetic powder prepared through the preparation method, the amorphous Al2O3 coating layer on the surface of the amorphous Al2O3 coated metal soft magnetic powder and the metal soft magnetic powder have higher binding force, and in addition, the amorphous Al2O3 coating layer can meet the low-temperature surface coating modification requirements of the coating layer and thermodynamic metastable state amorphous and nanocrystalline alloy and other metal soft magnetic powder.