11 results about "Calcium bromide" patented technology

The invention belongs to the field of perovskite devices, and particularly discloses a bromine-chlorine mixed blue-light perovskite thin film, a preparation method and a perovskite LED device. The bromine-chlorine mixed blue-light perovskite thin film is prepared from the following raw materials: cesium halide, lead bromide, lead chloride and alkaline earth metal bromide; the alkaline earth metal bromide comprises at least one of calcium bromide, strontium bromide and barium bromide; the ratio of the mole number of the alkaline earth metal bromide to the total mole number of Pb in lead bromide and lead chloride is not greater than 0.5. The bromine and chlorine mixed blue light perovskite is doped by adopting the alkaline earth metal bromide with a low-solubility perovskite phase, and the molar ratio of the doping amount of the alkaline earth metal bromide is not higher than 0.5, so that the nonuniform bromine and chlorine distribution of the blue light perovskite thin film in the film forming process is improved, the halogen separation under an electric field is inhibited, and the spectral stability is improved; by directly doping in the precursor, the preparation process is simple, and the method is suitable for large-scale industrial production.

The application relates to the field of concrete materials, and particularly discloses an early strength agent for improving the strength and durability of concrete and a preparation method thereof. The early strength agent for improving the strength and durability of concrete comprises the following raw materials in parts by weight: 20-30 parts of nano silicon dioxide, 10-20 parts of calcium bromide, 5-10 parts of silica fume, 2-4 parts of triethanolamine, 5-10 parts of ethylene glycol and 8-15 parts of an expansive agent. The early strength agent for improving the strength and durability of concrete reduces the corrosion and damage of chlorides and sulfates to concrete steel bars, the nano silicon dioxide, the silica fume and the calcium bromide are combined with each other to synergistically improve the strength and durability of concrete, the invasion and corrosion of chloride ions are reduced, and the impermeability of the concrete is improved.

The utility model belongs to the technical field of calcium bromide production, and particularly relates to an extraction and separation device for calcium bromide production, which comprises a sedimentation tank and a filter frame arranged above the sedimentation tank, the bottom surface of the filter frame is fixedly connected with a filter screen, and the right side of the sedimentation tank is provided with an extraction and separation device; the extraction and separation device comprises a mixing mechanism and a separation mechanism; the mixing mechanism comprises a support, a vertical rod, a mixing tank, a tank cover, a motor, a stirring shaft, a connecting ring and a stirring roller, the bottom of the vertical rod is fixedly connected to the upper portion of the support, the outer side of the mixing tank is fixedly connected to the vertical rod, the tank cover is connected to the upper portion of the mixing tank, and the motor is arranged in the middle of the tank cover. According to the extraction and separation device for calcium bromide production, before saline water enters the extraction device, the filter screen is arranged to remove suspended impurities, heavy metal ions and other interfering substances in the saline water, adverse effects of the impurities on the extraction process are avoided, and the purity of calcium bromide is improved.

A fixative contains carboxylic acid, preferably acetic acid, for parasitological samples. An exemplary aqueous fixative solution for parasitological samples comprises: a) a C2 to C6 carboxylic acid (preferably acetic acid) at a concentration of 0.5M or greater; and b) a C2 to C6 carboxylate salt or halide salt at a concentration of 0.02M or greater, preferably 0.04M or greater. An optional composition comprises 1.3M acetic acid, 12 mM sodium benzoate, 0.9% calcium chloride, 0.9% calcium bromide, 100 μg / ml menthol and 350 μg / ml thymol. The fixative is free of formaldehyde or other hazardous compounds, and exhibits good killing and staining properties when used with parasitological samples such as ova and helminths.

The utility model discloses a pressurizing kneading device for producing a calcium bromide etching resistant sheath of a drilling cable, which comprises a pressurizing kneading machine, the pressurizing kneading machine is provided with a kneading shell, and the kneading shell is provided with a sealing cover; the pressing kneading machine is provided with a bottom plate, two groups of supporting plates are arranged on the bottom plate, the kneading shell is arranged between the two groups of supporting plates, a top plate is arranged on the two groups of supporting plates, a lifting assembly is arranged on the top plate and connected with a sealing cover, and a heat dissipation cavity for cooling liquid to flow is formed in the sealing cover; the kneading device has the beneficial effects that in the production process of a calcium bromide etching resistant sheath material of a drilling cable, the material is effectively kneaded, and meanwhile, the kneading shell can be subjected to heat dissipation treatment through the heat dissipation cavity, so that the material is prevented from being damaged due to overhigh temperature, the performance and the quality of the sheath material are ensured, and the service life of the sheath material is prolonged. Therefore, the production efficiency and the product quality are improved.

The invention relates to a metal organic gel type composite adsorbent as well as a preparation method and application thereof. The metal organic gel type composite adsorbent comprises metal organic gel and hygroscopic salt, the hygroscopic salt comprises any one or a combination of at least two of calcium chloride, magnesium chloride, sodium chloride, barium chloride, cesium chloride, lithium bromide, calcium bromide, magnesium bromide, sodium bromide, barium bromide or cesium bromide. According to the preparation method of the metal organic gel type composite adsorbent, synthesis conditions are mild, large-scale preparation is easy, a reaction product is blocky gel, a final product is a granular integral adsorbent after drying, the adsorbent has efficient water vapor adsorption capacity, and the adsorbent has good application prospects. The metal organic gel type composite adsorbent has excellent adsorption and desorption performance and good cycle stability on water vapor.

The utility model belongs to the technical field of solution concentration equipment, and particularly relates to a calcium bromide solution concentration device which comprises a concentration tower, a shunting mechanism is arranged in the concentration tower, a concentration mechanism is arranged in the concentration tower, and a condensation mechanism is arranged outside the concentration tower. According to the calcium bromide solution concentration device, through the flow dividing mechanism and the condensation mechanism, the concentration efficiency and the equipment operation stability are greatly improved. In the flow dividing mechanism, the unique trapezoidal flow dividing table design guides the calcium bromide solution to form a stable film in the heat transfer pipe, the solution is uniformly dispersed, the contact area with hot steam is greatly increased, the concentration process is efficiently accelerated, and the large-scale production requirement is met. In the condensation mechanism, condensation fins and condensation pipes I are in close cooperation, the heat exchange area is expanded, steam generated by the concentration tower is rapidly condensed, it is guaranteed that the steam is treated in time, stable operation of the device is maintained, and the device is remarkably superior to a traditional device.

The invention relates to the field of the oil production industry, and more particularly to heavy well kill fluids containing at least one of the compounds: calcium bromide, barium bromide, magnesium bromide, strontium bromide, zinc bromide, calcium iodide, barium iodide, magnesium iodide, strontium iodide and zinc iodide, and to methods for producing same. The invention discloses a method which makes it possible to broaden the range of components that can be used to produce heavy kill fluids. The claimed method makes it possible to produce a heavy well kill fluid using accessible salt solutions, wherein the resulting fluid has the necessary properties for effectively killing wells. The claimed method includes mixing solutions of salts at a molar ratio of 0.5-1.3:2, evaporating the resulting mixed solution to a density of 1400-2650 kg / m3, cooling the evaporated solution to a temperature of less than 25°C to form a precipitate, and filtering the evaporated solution to obtain a filtrate in the form of a heavy well kill fluid.

The application belongs to the field of perovskite devices, and specifically discloses a bromine-chlorine mixed blue light perovskite film, a preparation method thereof and a perovskite LED device. The preparation raw materials of the bromine-chlorine mixed blue light perovskite film include cesium halide, lead bromide, lead chloride and an alkaline earth metal bromide; the alkaline earth metal bromide includes at least one of calcium bromide, strontium bromide and barium bromide; and the ratio of the mole number of the alkaline earth metal bromide to the total mole number of Pb in the lead bromide and the lead chloride is not greater than 0.5. The alkaline earth metal bromide with a perovskite phase of low solubility is used to dope the bromine-chlorine mixed blue light perovskite, and the mole ratio of the doping amount of the alkaline earth metal bromide is not higher than 0.5, so that the uneven distribution of bromine and chlorine in the blue light perovskite film during the film forming process is improved, the halogen separation under the electric field is inhibited, and the spectral stability is improved; the doping is directly performed in the precursor, the preparation process is simple, and the method is suitable for large-scale industrial production.

The invention belongs to the technical field of cable sheath materials, and particularly relates to a calcium bromide-resistant irradiation crosslinking type cable sheath material and a preparation method thereof.The cable sheath material is prepared from, by weight, 8-15 parts of POE resin, 5-15 parts of ethylene propylene diene monomer, 10-15 parts of metallocene polyethylene, 5-8 parts of compatilizer, 50-65 parts of inorganic flame retardant, 0.8-1.5 parts of silane coupling agent and 0.4-1.2 parts of antioxidant. 0.5 to 1.0 part of a surface modifier, 0.5 to 1.2 parts of a cross-linking accelerant and 0.02 to 0.06 part of a cross-linking initiator. The components of the cable sheath material are innovated, so that the irradiation crosslinking type low-smoke halogen-free flame-retardant cable sheath material capable of resisting calcium bromide erosion is obtained.

This invention discloses an experimental apparatus and method for visualizing the permeability of grouting slurry in pipe jacking in water-rich pebble formations. The apparatus includes a model box filled with transparent soil, which is composed of transparent fused silica particles and a calcium bromide solution with a refractive index matching that of the fused silica. A circular pipe is nested within the transparent soil. A jacking module is installed at the left end of the circular pipe, and a grouting module is located on the right side of the model box. A pressure plate and weights are installed on top of the transparent soil to adjust the vertical pressure. A first laser slicing observation module and a right-side laser slicing observation module are respectively located in front of and on the right side of the model box. A front-side industrial camera and a right-side industrial camera are also located in front of and on the right side of the model box, respectively. Grouting holes are provided on the wall of the circular pipe. The grouting pipe of the grouting module extends into the inner wall of the circular pipe and connects to the grouting holes through a grouting branch pipe. This invention provides a scientific, intuitive, and reliable experimental basis and methodological support for circular pipe jacking engineering in water-rich pebble formations.