43 results about "Strontium chloride hexahydrate" patented technology

The invention discloses a phase change material and a preparation method thereof. The phase change material comprises the following preparation raw materials: calcium chloride hexahydrate, strontium chloride hexahydrate and a melting point regulator, wherein the raw materials comprise the following components in percentage by mass: 80-90% of calcium chloride hexahydrate, 5-10% of strontium chloride hexahydrate and 5-10% of the melting point regulator. The preparation method of the phase change material specifically comprises the following steps: weighing calcium chloride hexahydrate, strontium chloride hexahydrate and the melting point regulator, and mixing the raw materials according to mass parts to prepare a solution; heating the solution in a constant-temperature water bath at 60-80 DEG C, and continuously stirring until the raw materials are completely molten and the solution becomes a transparent liquid; and crystallizing the transparent liquid at a low temperature of 4-6 DEG C to obtain the phase change material. The phase change material disclosed by the invention is simple in preparation process, only needs three steps namely mixing, melting and crystallization, and is less in adopted raw material type and cheap and easily-available in raw material; and the prepared phase change material is non-toxic and non-corrosive, the phase change temperature can be adjusted between 24 DEG C and 31 DEG C, the latent heat of phase change is 120-170J/g, the super-cooling degree is less than 10 DEG C, and the phase change process is reversible.

A novel preparation method of a SrTiO3/Cu2O junction composite nanomaterial comprises the following steps: dissolving titanium isopropoxide (tetraisopropyl titanate) and strontium chloride hexahydratewith acid, performing mixing, regulating pH to 3-4, heating up to 90 DEG C, and preserving the temperature for 3 h; then heating up to 400-500 DEG C, and preserving the temperature for 4-6 h; obtaining a SrTiO3 catalyst; at 35 DEG C, stirring copper acetate dihydrate to be dissolved in glycol methyl ether, performing stirring, performing ultrasonic treatment for 60 min, then adding a SrTiO3 catalyst, performing stirring, adding a sodium hydroxide solution, regulating pH to be 10-14, and performing stirring for 10 min at 50 DEG C; adding enough dextrose solution, and performing a reaction for1-1,5 h; and cooling to the room temperature, and performing centrifugal separation to obtain a solid precipitate which is the rTiO3/Cu2O junction composite nanomaterial. In a SrTiO3/Cu2O heterojunction composite catalyst, SrTiO3 and Cu2O form heterojunctions to facilitate application to electronics and holes. The heterojunction composite catalyst degrades organic dye wastewater under visible light, and particularly, the photocatalytic degradation efficiency of a methylene blue organic solution reaches 92%.

The invention discloses a biomimetic preparation method of a strontium carbonate crystal, wherein a coronary strontium carbonate nano crystal is prepared by a biomimetic method in a specific communication device by adopting strontium chloride hexahydrate and ammonium bicarbonate as reactants and sesbania gum as a biological regulation agent. According to the target product coronary strontium carbonate nano crystal, the corolla diameter is 3,000-6,000nm; the corolla is composed of nano rods with diameter being 50-80nm; the corolla structure is tight, with purity being greater than or equal to 99% and yield being 97-99%. The method disclosed by the invention has the characteristics of mild conditions, low energy consumption, large corolla diameter, tight corolla structure, high purity, highyield, low preparation cost, etc.

The invention relates to a marking method for proliferation and releasing of large yellow croakers. The marking method includes the steps that hexahydrate strontium chloride is added in a nursery pond for releasing the large yellow croakers, the concentration of strontium ions in water of the nursery pond is increased to 0.05-0.10 g/L, strontium marking is conducted on fries with the age being 30-40 days, the marking time is 10 days, and after marking, strontium element content detection is conducted on an otolith abrasive disc. The marking method is simple in technology, has stability and convenience, can provide an effective means for evaluation of the proliferation and releasing effects of the large yellow croakers, can be used for tracking and monitoring the releasing effect of the large yellow croakers for a long-time, and provides a scientific basis for the fishery management department.

The invention relates to a production method of strontium chloride hexahydrate for liquid crystal glass base plate production. The production method comprises the following steps: a, concentrating a strontium chloride solution at the temperature of less than 100 DEG C to 38-44 baume degrees; b, cooling and crystallizing the solution, wherein the specifically steps are as follows: firstly adding crystal seeds, which are strontium chloride hexahydrate crystals with a particle diameter of less than 1 millimeter, at the charging ratio above 2 kg/m<3> and controlling cooling speed; c, ageing a crystal slurry solution reaching the temperature for 1.5-3 hours under the stirring condition; and d, putting aged crystal slurry in an automatic centrifugal machine for dehydration, and drying with cold wind so as to obtain a finished product. According to the production method provided by the invention, the surface of the strontium chloride hexahydrate crystal has extremely low adhered water and low impurities; by a stacking test for 6 months, no caking phenomenon occurs; and by a stacking test for 9 months, little caking phenomenon occurs (the ratio of caking is 5-8%), and the cakes can be loosened by lightly pinching with hands.

The invention relates to a composite phase-change material in which calcium chloride hexahydrate is encapsulated by a calcium-based metal-organic framework and a preparation method thereof, belonging to the field of phase-change materials. The composite phase change material of the present invention is composed of 65%-90% inorganic hydrate salt phase change material-calcium chloride hexahydrate and 10%-35% calcium-based metal organic framework. The feature of the present invention is that calcium chloride hexahydrate is confined in the nano-scale pores of the metal-organic framework, and the calcium chloride that cannot be completely dissolved after melting will deposit in the pores of the metal-organic framework, which can fully contact with water to ensure the next time The solidification and crystallization process proceeds smoothly without phase separation; the crystal form difference between the calcium-based metal-organic framework and calcium chloride hexahydrate is within 15%, and the metal-organic framework can be used as a nucleation matrix for calcium chloride hexahydrate crystallization , making the supercooling of calcium chloride hexahydrate within 2oC. The composite phase change material of the present invention solves the problems of leakage, supercooling and phase separation of calcium chloride hexahydrate, and at the same time can maintain stable performance in the air, and more importantly, the raw material is cheap, the process is simple, and the reaction conditions are mild , and its industrial production has high competitiveness.

The invention provides a method and device for drying strontium chloride hexahydrate. Strontium chloride hexahydrate sequentially passes through a plurality of fluidizing cavities of a fluidizing bed, and hot air at the temperature of 50-100 DEG C enters into the fluidizing bed from a last fluidizing cavity. The hot air reversely and sequentially enters into each fluidizing cavity to carry out counter-current drying on materials in the fluidizing cavity. By adopting the method and device provided by the invention, the drying process is easy to control. The air used for drying the materials iscontacted with the materials for multiple times, and the utilization rate of heat energy is high. The air used for drying is fully contacted with the materials, thus a product is uniformly dried, andthe phenomenon that crystal water is removed as partial strontium chloride hexahydrate is excessively dried can be prevented.

The invention relates to a simple method and a device for preparing a coral strontium carbonate crystal. The coral strontium carbonate crystal is prepared by using strontium chloride hexahydrate and ammonium bicarbonate as reactants and starch as a biomimetic assembly agent. The strontium chloride hexahydrate, ammonium bicarbonate and a starch solution are added into the designed reaction device,and are reacted at room temperature; a crystal generated in the device is filtered 48 h after the above reaction, is washed with distilled water three times, and then is dried at 105 DEG C for 1 h toobtain the coral strontium carbonate crystal composed of crystal rods. The diameter of every crystal rod is 100-200 nm, and the length is 0.6-2.0 [mu]m; and the purity of the product is equal to or more than 99%, and the yield is 95-97%. The method and the device have the characteristics of high preparation efficiency, environmental friendliness, low energy consumption, easiness in industrial production, and low production cost.

The invention provides a flounder-otolith-element marking method. The flounder-otolith-element marking method is characterized by including the following steps that (1) strontium chloride hexahydrate and fish feed are mixed to be even, a strontium element is contained in the fish feed, and marked feed is obtained; (2) to-be-marked flounders are fed with the marked feed; (3) the flounders are fed with the marked feed for 1 time to 2 times every day, and feeding time is at least 3 days; (4) the content of the strontium chloride hexahydrate at least accounts for 0.8% of the whole mass of the marked feed. The strontium element can be precipitated on a growth ring of otolith through the physiological process such as blood transmission, an element annule is formed, and the fingerprint marker effect of releasing a flounder otolith element is generated; the fingerprint marker stability of the otolith strontium element is good, is not influenced by the outside, and can be preserved permanently; the strontium chloride hexahydrate are harmless to to-be-marked fishes, and both the fatality rate of the high concentration and the fatality rate of the low concentration are quite low.

The invention relates to a phase-change material, and especially relates to an inorganic phase-change constant-temperature material and a preparation method thereof. The inorganic phase-change constant-temperature material comprises calcium chloride hexahydrate, strontium chloride hexahydrate, sodium chloride, acrylic acid, glycerol, hydroxyethyl methacrylate, maleic anhydride, sodium carboxymethyl cellulose, boric acid and expanded graphite, wherein the total amount of the boric acid and the expanded graphite is 2-12% of the total amount of the inorganic phase-change constant-temperature material; and a mass ratio of the boric acid to the expanded graphite is (1-6):(1-6). The phase-change temperature of the inorganic phase-change constant-temperature material is 26 DEG C, the supercoolingdegree is 0.3 DEG C, the phase-change latent heat is not lower than 236 KJ/Kg, the phase-change process is reversible, and the material can be recycled for not lower than 10000 times; and in addition, the situation of thermal physical property degradation does not exist in the circulation process, and leakage from a base body is not prone to happening.

The invention discloses an SrTiO3 nanometer material preparation method and belongs to the field of functional materials. The SrTiO3 nanometer material preparation method comprises the following stepsof by adopting methanol as a solvent, adding chemical raw materials including citric acid, strontium chloride hexahydrate and butyl titanate in the methanol solvent, stirring and dissolving to obtaina mixed solution, and performing gel formation, drying and calcining treatment on the solution to obtain a strontium titanate material with excellent performance. For the preparation method providedby the invention, by adopting the methanol as the solvent, the method is simple in technological process, obtained strontium titanate is stable in quality, high in purity and good in uniformity, the preparation period is greatly shortened, and the production efficiency is improved at the same time.

The invention relates to a phase-change material, in particular to an inorganic phase-change constant-temperature material and a preparation method thereof. The inorganic phase-change constant-temperature material comprises calcium chloride hexahydrate, strontium chloride hexahydrate, maleic anhydride, sodium formate, sodium chloride, potassium persulfate, boric acid and expanded graphite; whereinthe total amount of the boric acid and the expanded graphite accounts for 2-12% of the total amount of the inorganic phase-change constant-temperature material; wherein the mass ratio of the boric acid to the expanded graphite is (1-6): (1-6). According to the inorganic phase-change constant-temperature material, the phase-change temperature is 39 DEG C, the supercooling degree is 0.3 DEG C, thephase-change latent heat is not lower than 221 KJ/Kg, the phase-change process is reversible, and the number of times of recycling is not lower than 10000; and in addition, the situation of thermal physical property degradation does not exist in the circulation process, and leakage from a base body is not likely to happen.

The invention relates to orange-red rear-earth phosphors and a preparation method thereof. The orange-red rear-earth phosphors are prepared from strontium carbonate, calcium chloride, strontium chloride hexahydrate, strontium fluoride, strontium bromide, aluminum hydroxide, boric acid and europium oxide serving as raw materials by adopting a high-temperature solid state method. The preparation method comprises the following steps of: uniformly mixing the raw materials according to proportions, pre-sintering for 3-6 hours at 400-500 DEG C, cooling to a room temperature, taking out the raw materials and uniformly grinding again, reducing and sintering at a CO atmosphere for 4-10 hours at 1000-1200 DEG C, and grinding fine obtained sinters to obtain final products. The orange-red rear-earth phosphors have high luminous efficiency, good stability and very high quenching temperature and are suitable for InGaN chips giving out ultraviolet lights with about 400nm wavelength.