6results about How to "Facilitate phase transition" patented technology

The invention relates to the technical field of copper pipe heat dissipation, in particular to a micro-channel heat dissipation device based on a copper pipe structure, which comprises a heat dissipation substrate, a copper pipe type heat dissipation channel and a liquid cooling circulation system, the copper pipe type heat dissipation channel is composed of a plurality of plastic copper pipes and replaces a traditional micro-channel or vapor chamber structure. The copper pipe is embedded or fixed in the heat dissipation substrate or on the surface of the heat dissipation substrate, cooling liquid circulates in the copper pipe, and efficient heat dissipation is achieved through the combined action of forced convection heat exchange and heat transfer; the copper pipe has good plasticity and can be subjected to three-dimensional bending forming according to heat source distribution and spatial layout, through the synergistic effect of forced convection and phase change heat transfer, the heat transfer efficiency is improved, particularly, extremely high local heat flow density can be coped, the chip is effectively prevented from being overheated, and the heat transfer efficiency is improved. The heat dissipation channel can be bent and formed in a three-dimensional space according to heat source distribution, accurate matching with the heat source form is achieved, limitation of traditional plane heat dissipation is broken through, and optimal configuration of heat dissipation capacity and heat flux density is achieved.

The invention discloses a perovskite precursor solution, a perovskite active layer prepared from the perovskite precursor solution and application of the perovskite active layer. The perovskite precursor solution contains a mixture of formamidine thiocyanate (FASCN) and rubidium thiocyanate (RbSCN). According to the invention, the mixed additives formamidine thiocyanate FASCN and rubidium thiocyanate RbSCN are added into the precursor solution to effectively promote phase transformation from an inactive phase delta to an active phase alpha, so that the efficiency and the stability of the methylamine-free perovskite battery are remarkably improved, and the methylamine-free perovskite battery has a relatively good commercial application prospect.

The invention provides a monitoring method and device for the temperature control process of phase change copper foil deposition equipment. The monitoring method comprises the steps that the electrolyte temperature, the copper foil surface temperature and the heat flux density penetrating through an inactivation product layer are obtained; identifying the temperature difference change between the electrolyte temperature and the copper foil surface temperature, and extracting the offset of the temperature difference ratio along with time; performing temperature interval matching on the time stamp of the transition time node and a phase change interval reference, determining a starting point of a buffer layer entering function of an inactivated product layer, and generating a dynamically adjusted temperature control target value; and predicting the change trend of the subsequent heat flux density according to the dynamically adjusted temperature control target value, generating a feedback signal, transmitting the feedback signal to deposition equipment control, and realizing real-time compensation on the product accumulation influence.

This invention discloses a batching process for producing autoclaved aerated concrete (AAC) bricks. In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for AAC brick production. This improves the impact resistance of the resulting AAC bricks and makes their surface smoother and more aesthetically pleasing, thus enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reducing firing time and increasing firing speed. This allows the method to be suitable for large-scale production, improving economic efficiency. The addition of wear-resistant agents to the anti-corrosion powder enhances the corrosion resistance and wear resistance of the concrete bricks, extending their normal service life.

This invention provides a multi-metal-doped sodium-ion battery cathode material, its preparation method, and its application, relating to the field of cathode materials. The method for preparing the multi-metal-doped sodium-ion battery cathode material of this invention, wherein the cathode material has the chemical formula NaLi, is described in this invention. x Ni y Fe 0.2 Mn z Ti n O2, x=0.05-0.15, y=0.25-0.35, z=0.25-0.35, n=0.05-0.15, x+y+z+n=0.8, includes the following steps: (1) the precursors of the above stoichiometric sodium source and transition metal source are mixed by ball milling wet grinding to obtain a uniformly mixed powder; (2) the uniformly mixed powder is subjected to high-temperature calcination in air atmosphere to form a target layered structure, thereby obtaining a multi-metal doped sodium-ion battery cathode material. The novel molar ratio O3-type layered cathode material provided by this invention has a multi-metal synergistic effect, which can effectively improve the phase transition process of the material during charging and discharging, so that it exhibits high specific capacity, excellent rate performance and long cycle life at different cutoff voltages (4.0 and 4.3V), and has a bright application prospect.

The application relates to the technical field of composite materials and discloses a protein separation special precise ultrafiltration membrane and a preparation method thereof, which comprises the following steps: S1: polyether sulfone, zinc oxide, glycerol, acetone and a solvent are added into a reaction kettle to be configured into a mixed solution, and the mixed solution is stirred and heated; S2: the mixed solution prepared in S1 is uniformly stirred, vacuum defoaming treatment is carried out, and an ultrafiltration membrane casting solution is prepared; S3: the casting solution in S2 is extruded from a ring-shaped spinneret through a metering pump, warm and humid air is introduced into the inner cavity of the ring-shaped spinneret, the air enters a gel tank, is phase-separated and solidified to be a hollow fiber membrane, the initial polyether sulfone hollow fiber ultrafiltration membrane is obtained through traction and winding; and S4: the initial polyether sulfone hollow fiber ultrafiltration membrane in S3 is cleaned with pure water, is hung and dried in a dehumidification room with certain temperature and humidity, and the hollow fiber special ultrafiltration membrane is prepared; the application has the following advantages and effects: the finished product has better hydrophilicity, higher pure water flux and more precise separation effect.