7results about How to "Good thermal stability" patented technology

The application discloses a kind of coherent non-local terahertz wave front regulation and control metasurface device use method, it is related to terahertz device technical field.The specific steps of the method are as follows: S1, circularly polarized terahertz waves of opposite rotation are incident from the two sides of coherent non-local terahertz beam deflection metasurface device along normal line;S2, the relative distance of two terahertz waves to metasurface is adjusted, so that the optical path difference is the odd multiple of half wavelength;S3, the transmitted wave generated by the plane wave emitted by one wave source through metasurface is coherent with the reflected wave generated by the plane wave emitted by another wave source through metasurface, and the coherent constructive diffraction wave can be observed at the target diffraction angle.The application integrates efficient circularly polarized wave chirality conversion, sensitive spectral selection, wave front regulation and control and active coherent tuning function of output energy into one, and is simple in design and easy to process, and can be widely applied in the field of terahertz imaging.

The invention provides a layered silicate material, a silicate molecular sieve and a preparation method and application thereof, and belongs to the technical field of molecular sieves. According to the layered silicate material provided by the invention, the ratio of Si to heteroatoms is highly adjustable, the layered silicate material has good thermal stability and hydrothermal stability, a 12-membered ring opening is formed in a silicate layer, and the layered silicate material can be used as a precursor for preparing a molecular sieve to generate a three-dimensional silicate molecular sieve through topological condensation; the monolayer silicate nanosheet can also be obtained through layer stripping treatment and is used for preparing an oriented film, an adsorbent, a catalyst, an ion exchanger, a nanofiltration material or a seawater desalination film and the like. The framework of the silicate molecular sieve provided by the invention has eight topology independent atoms, the crystal structure of the silicate molecular sieve has a 12 * 12 * 12-membered ring three-dimensional cross duct system, and the silicate molecular sieve can be used as a catalyst, an ion exchanger or an adsorbent.

The application relates to the field of high polymer material preparation, and discloses a methyl methacrylate polymer and a preparation method and application thereof. The method comprises the following steps: (1) performing a prepolymerization reaction on methyl methacrylate, optionally a functional monomer X, a chain transfer agent and an initiator I in a reaction kettle I in the presence of a protective gas to obtain a prepolymer; (2) performing a final polymerization reaction on the prepolymer in a reaction kettle II in the presence of the protective gas to obtain the methyl methacrylate polymer; wherein, the step (1) and / or the step (2) are performed in the presence of an initiator II; wherein, the initiator II is a compound shown in formula I, and the methyl methacrylate polymer has the characteristics of narrow molecular weight distribution.

This invention relates to the field of organic electroluminescent display technology, specifically to an electron transport layer material with phenanthreneimidazole as the core framework, an organic electroluminescent diode, and a fabrication method. The ETM, obtained by introducing simple substituents at the N1 and C2 positions, is simple to synthesize and has a high yield. This type of ETM successfully balances the contradiction between conjugation degree and triplet energy level (ET), achieving wide bandgap, high ET, and high electron mobility. OLED devices fabricated with this type of ETM can achieve low turn-on voltage and high device efficiency. For example, CH3OPICN achieves a turn-on voltage of 4 × 10⁻⁶. 5 V cm ‑1 Under an electric field strength of [insert value here], the electron mobility can reach 4.4 × 10 [insert value here]. ‑5 cm 2 V ‑1 s ‑1 Blue OLED devices fabricated using this as an electron transport layer exhibit a turn-on voltage of 3.0V and a density of 83180 cd·m². ‑2 Its brightness reaches 15.7 cd·A. ‑1 The current efficiency is 11.8 lm·W. ‑1 With a power efficiency of 7.7% and an external quantum efficiency, it is an excellent ETM that can be commercialized.

This invention discloses an environmentally friendly fluorinating agent for liquid cooling systems and its preparation method. The main component is perfluoropolyether-modified hydrofluoroether, prepared from raw materials comprising the following mass fractions: 70%–85% hydrofluoroether, 8%–15% perfluoropolyether, 3%–8% heat stabilizer, 2%–6% corrosion inhibitor, 0.2%–0.8% defoamer, and 0%–3% cosolvent. This invention achieves environmental friendliness (lower GWP) and low toxicity (LD50) through a multi-component synergistic design of "low GWP hydrofluoroether + PFPE modification + preferred compound stabilizer and corrosion inhibitor". 50 It is significantly superior to existing products in terms of higher temperature, thermal stability (higher decomposition temperature) and material compatibility (lower corrosion rate and swelling rate), and fully meets the requirements of high-end liquid cooling systems.

The invention discloses a protective coating for a glass inner wall of a container and a preparation method of the protective coating, and belongs to the technical field of coatings. The protective coating is of a composite film structure and comprises an inner layer composed of oxides of silicon, aluminum, zirconium and titanium and an outer layer composed of pure silicon oxide. And the inner layer comprises the following elements in percentage by mass: 80 to 100 percent of silicon element, 0 to 10 percent of aluminum element, 0 to 10 percent of zirconium element and 0 to 3 percent of titanium element based on the total mass of the silicon element, the aluminum element, the zirconium element and the titanium element being 100 percent. By adopting a specific double-layer composite structure, the gradient compact barrier with complementary functions is formed. The structure not only can synergistically block precipitation of various ions, but also has the advantages of firm combination and good thermal stability, so that the chemical stability and the service life of the glass container are remarkably improved.

This invention belongs to the field of phosphate binders, specifically relating to a linear saturated aliphatic dicarboxylic acid-iron(III) complex, its preparation method, and its applications, particularly its use in preparing drugs for the treatment or prevention of hyperphosphatemia. In the dicarboxylic acid-iron(III) complex, the molar ratio of iron to dicarboxylic acid is 1:0.8~1.2, and the dicarboxylic acid is a linear saturated aliphatic dicarboxylic acid. The complex is prepared by reacting a ferric salt and a dicarboxylic acid salt in a solvent. In vitro phosphate binding experiments demonstrate that the dicarboxylic acid-iron(III) complex of this invention exhibits high phosphate binding capacity per unit mass of iron within the pH range of 3-7, and maintains a high phosphate binding capacity per unit mass of iron in vivo, significantly superior to commercially available sucrose ferric hydroxide chewable tablets. As an oral phosphate binder, the complex of this invention exhibits stronger phosphate binding capacity per unit mass of iron in vivo, higher iron utilization, lower total iron intake, and fewer adverse reactions.