37results about How to "Control the rate of diffusion" patented technology

Various embodiments provide transistors and methods for forming the same. In an exemplary method, a substrate can be provided. A gate structure can be formed on the substrate. A stress layer can be formed in the substrate on both sides of the gate structure. Barrier ions can be doped in the stress layer to form a barrier layer in the stress layer. The barrier layer can have a preset distance from a surface of the stress layer. An electrical contact layer can be formed using a portion of the stress layer on the barrier layer by a salicide process. The electrical contact layer can contain a first metal element. The first metal element can have a resistivity lower than a resistivity of a silicidation metal. The barrier layer can prevent atoms of the first metal element from diffusing to a bottom of the stress layer.

The invention relates to an acid fracturing method of a temperature-control and variable-viscosity acid in the exploitation of an oil-gas well, which comprises the steps that: a common chlorohydric acid pickling process is firstly used for removing the pollution of an embrasure; then, the temperature-control and variable-viscosity acid fracturing process, or an ahead-fluid temperature-control andvariable-viscosity acid fracturing process, or a temperature-control and variable-viscosity acid fracturing enclosed acidizing process, or an ahead-fluid temperature-control and variable-viscosity acid fracturing enclosed acidizing process is adopted; the weight ratio of the components of the temperature-control and variable-viscosity acid are as follows: 100 portions of basic acid solution, 0.5 portion to 1.5 portions of the main agent of the temperature-control and variable-viscosity acid, 1 portion to 3 portions of a corrosion inhibitor of the temperature-control and variable-viscosity acid, 0.5 portion to 1 portion of an emulsion breaker, 0.5 portion to 1 portion of a ferric ion stabilizer and 0.5 portion to 1 portion of a high efficient discharge aiding agent; 2-percent KCL clear water is used for displacing the temperature-control and variable-viscosity acid into the stratum. The temperature-control and variable-viscosity acid is easily prepared on site, with low friction drag and strong pumpability, thereby being capable of being applied to high-discharge construction; under the high temperature condition of a storing layer, both the fresh acid and the residue acid have high viscosity, thus increasing the length of acid-etching cracks. After the construction is finished, the viscosity of the residue acid is reduced, which is beneficial to the back discharge of the residue acid.

The invention provides a core-shell light aggregate and a preparation method thereof. The core-shell light aggregate includes an inner core and an outer shell; the mass ratio of the inner core and the outer shell is 1:1 to 2:1; and in terms of mass percentage, the inner core includes the following components : Sludge: 65% to 85%, superphosphate: 6% to 12%, potassium sulfate: 5% to 10%, manganese nitrate: 3% to 8%, ammonium phosphate: 5% to 11%, sodium chloride : 4% to 10%; by mass percentage, the shell includes the following components: polluted soil: 75% to 85%, sludge: 10% to 15%, glass powder: 5% to 10%. The core-shell light aggregate of the present invention uses sludge as the main raw material and adds inorganic salts and plant nutrients containing nitrogen and phosphorus to prepare the core, and then uses polluted soil as the main raw material and adds sintering aid glass powder to prepare the shell. The sintering method wraps the outer shell on the inner core. On the one hand, it improves the utilization rate of solid waste such as sludge and polluted soil. On the other hand, it develops a light aggregate suitable for plant hydroponics, which is very Important economic, environmental protection and scientific research significance.

The invention discloses a preparation method of a metal organic framework nano-pesticide encapsulated by a coordination polymer, using MOF(Fe III ) or MOF (Cu II ) as a pesticide carrier, load pesticide molecules in the solution, and then use tannic acid (tannic acid, TA) or tannic acid-Fe in aqueous solution III (TA‑Fe III ) or tannic acid-Cu II (TA‑Cu II ) Coordination polymers encapsulate pesticide-loaded metal-organic framework nanoparticles. The nanopesticide controlled-release preparation described in the present invention prevents the early release of pesticide molecules in a solvent, increases the lasting efficacy of the pesticide, is environmentally friendly, and achieves the purposes of preventing and controlling pests and increasing agricultural production and quality. The nano-pesticide controlled-release preparation provided by the present invention has a high drug loading rate and good biocompatibility, and the materials used are environmentally friendly, cheap in cost, and simple in the preparation process, and can realize the controlled release performance of pesticides with multiple biological interfaces and environmental responses. Easy to degrade and not easy to accumulate in plants.

The invention relates to the technical field of pest control, and specifically discloses a self-flowing drying agent and its preparation method and application. The self-flowing dry injection agent includes the following components by weight percentage: thickener: 0.3%-18%, synergist: 1%-5%, fertilizer: 0.1%-8%, solvent: 3.7% ~19%, surfactant: 0.3%~38%, insecticide: 2%~6%, antifreeze: 0.2%~3%, and the balance is water; the synergist is sodium nitrophenolate. The self-flowing desiccant prepared by the invention is stable and effective, and can be popularized and applied in a large area.