8results about How to "Simple and efficient process" patented technology

The invention provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof, the composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, the sandwich microstructure comprises at least one first wurtzite boron nitride layer and at least one second wurtzite boron nitride layer, wherein the first wurtzite boron nitride layer is formed by wurtzite boron nitride; at least one second wurtzite boron nitride layer composed of wurtzite boron nitride; the composite material comprises a first wurtzite boron nitride layer, a second wurtzite boron nitride layer and a diamond layer, the diamond layer is arranged between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer and is made of diamond, wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is larger than 50 GPa. The novel wurtzite boron nitride / diamond composite material disclosed by the invention has high hardness, high toughness and high thermal stability, and the preparation method disclosed by the invention is low in initial raw material price and simple in preparation process.

The application provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof. The composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, which comprises at least one first wurtzite boron nitride layer composed of wurtzite boron nitride, at least one second wurtzite boron nitride layer composed of wurtzite boron nitride, and a diamond layer composed of diamond and sandwiched between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer. The wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is greater than 50 GPa. The novel wurtzite boron nitride / diamond composite material has high hardness, high toughness and high thermal stability, and the preparation method has low starting material price and simple preparation process.

The application provides a time synchronization system and method based on a TDMA system wireless network virtual-real joint simulation, which comprises a physical network and a virtual network simulation system, time synchronization between multiple physical nodes of the physical network is completed through radio frequency signals, and wireless communication of the TDMA system is adopted; one of the physical nodes is a gateway node, the gateway node is provided with a first interface and a second interface, the first interface is used for generating a time slot pulse signal, and the second interface is used for generating a time slot numerical signal; the virtual network simulation system communicates with the physical network, and the virtual physical network system is provided with a third interface for receiving the time slot pulse signal and a fourth interface for receiving the time slot numerical signal; wherein the time slot pulse signal carries synchronization interrupt information, the time slot numerical signal carries time slot time information, and the virtual network simulation system realizes time synchronization with the physical network through the time slot pulse signal and the time slot numerical signal. The application has high time synchronization precision and low resource consumption.

The invention discloses a rare earth Er low-temperature modified amorphous alumina hydrogen / deuterium / tritium resistant coating and a preparation method thereof. The coating comprises a metal substrate and an Er low-temperature modified amorphous alumina coating covering the metal substrate. The preparation method comprises the following steps: pre-treating the metal substrate; preparing Er modified amorphous alumina sol containing an aluminum source and erbium salt through a sol-gel process; a coating prefabricated layer is formed on a substrate through a coating technology, organic matter is removed through low-temperature heat treatment, and the coating is obtained. According to the coating, Er-O bonds and interface hydrogen blocking traps are formed through solid solution and nanocrystalline precipitation of Er in an amorphous aluminum oxide network, and the barrier property is remarkably improved. Experiments show that when the Er modification proportion is 10%, the deuterium permeation barrier factor PRF of the coating reaches 2407, and the permeability of the coating is reduced by about three orders of magnitude compared with that of a stainless steel matrix. The method is simple in process, low in preparation temperature, excellent in hydrogen resistance and suitable for the fields of nuclear energy, hydrogen energy and the like.

This invention discloses a modified aluminide coating based on Ni2Al3 powder, its preparation method, and its application, belonging to the field of high-temperature alloy surface protection technology. The invention uses Ni2Al3 powder and aluminum powder as the aluminum source, silicon powder and rare earth oxides as modifiers, and polyvinyl alcohol aqueous solution as a binder. These are mixed to form a slurry, which is then coated onto the surface of an alloy substrate. After high-temperature sintering, a coating is formed on the substrate surface. This invention introduces Ni2Al3 alloy powder to replace traditional pure Al powder as the aluminum source, fully utilizing the advantages of Ni2Al3 alloy powder, overcoming the limitations of existing coating preparation methods, and effectively improving the stability of the coating under high-temperature environments. It has significant engineering application value and broad industrial prospects in the field of anti-oxidation protection in high-temperature environments such as aero-engine turbine blades.

This invention belongs to the field of electrochemical power source technology, and relates to a multi-metal ion-substituted V site M x V₂O₅ materials, their preparation methods, and applications. The preparation steps are as follows: Citric acid monohydrate, anhydrous oxalic acid, and ammonium metavanadate are sequentially added to deionized water and stirred until completely dissolved to obtain a first solution; citric acid monohydrate and a salt containing metal cation M are added to deionized water and stirred until the salt containing metal cation M is completely dissolved to obtain a second solution; the two solutions are mixed evenly and reacted under a preset temperature to form a gel-like product; the gel-like product is dried to obtain a precursor dry gel; then, after grinding and high-temperature annealing, M is obtained. x V₂O₅ material. The M x When V2O5 is used as a cathode material for lithium-ion secondary batteries, it exhibits excellent reversible capacity and cycle stability, and eliminates the problems of voltage drop and poor cycle stability of traditional V2O5 during discharge.

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.

The application discloses a wind turbine tower bolt loosening identification method and system, comprising the following steps: S1, obtaining unit operation data; S2, calculating the actual tower frequency, and then generating the corresponding time sequence; S3, performing stability analysis on the generated time sequence, and marking the suspected bolt loosening abnormal points of the tower; and S4, determining the loosening position of the tower bolt. Without using special monitoring hardware equipment, the application is based on the existing general operation data fusion driving of the unit, constructs the corresponding algorithm, realizes the reliable monitoring and early warning of the tower bolt loosening, and has the advantages of high accuracy, high reliability, low cost, and the like.