135 results about "Boric acid powder" patented technology

This invention concerns a thermocouple which is protected by an outer sheath comprising inner and outer tubes with the annular space filled with low temperature sintering refractory material which is preferably beaded before filling in the space and in which the outer tube is constricted to compact the material. The refractory material will include borosilicate and boric acid powder.

The invention belongs to the technical field of tea tree cultivation, and particularly relates to a tea tree hardwood cutting seedling nutrient solution formula and a preparation method thereof. The nutrient solution of the invention comprises 460-480 mg/L of N, 60-65 mg/L of P, 85-90 mg/L of K, 29-30 mg/L of Ca, 10-11 mg/L of Mg, 0.041-0.045 mg/L of Zn, 0.110-0.113 mg/L of F, 0.04-0.05 mg/L of Cu, 0.11-0.12 mg/L of Mn, and 0.11-0.12 mg/L of Be. The preparation method of the nutrient solution comprises the following steps: weighing 10 g of urea, 3 g of potassium dihydrogen phosphate, 1 g of calcium sulfate, 0.5 g of magnesium sulfate, 0.01 g of zinc sulfate, 0.03 g of ferric sulfate, 0.01 g of copper sulphate, 0.03 g of manganese sulfate, and 0.02 g of boric acid powder, adding water and dissolving to 10 L, preparing 1 L of 100-time mother liquor, taking out 10 mL from the mother liquor as needed, diluting into 1 L for use. The nutrient solution of the invention can promote growth of tea tree hardwood cutting seedlings; robust and qualified tea seedlings can be cultivated at the same year; the tea seedling survival rate from nursery is improved; the tea seedling transplanting survival rate is increased; the tea tree improved variety propagation coefficient is increased; and the invention plays an active role in the promotion of tea tree improved variety systems.

The invention relates to nutrient solution for heliophilous flowers and plants, which is prepared by dissolving 3 to 7 grams of urea, 2 to 5 grams of monopotassium phosphate, 0.5 to 1.5 grams of calcium sulfate, 0.3 to 0.7 gram of magnesium sulfate, 0.001 gram of zinc sulfate, 0.003 gram of ferric sulfate, 0.001 gram of copper sulfate, 0.003 gram of manganese sulfate, 0.002 gram of boric acid powder and 10 kilograms of water. The nutrient solution is applied to the heliophilous flowers and plants, facilitates the growth of roots, complements nutrient elements required by the flowers and plants, improves survival rate, makes flower leaves lush and dark green, facilitates the flower bud differentiation of the flowers and plants, endows the flowers and plants with a plurality of large flowers with attractive appearances and bright colors, and improves the drought resistance, flood resistance and cold resistance of the flowers and plants.

The invention relates to the technical field of plus materials for socks, and particularly relates to an antibacterial and hygroscopic plus material for socks. The antibacterial and hygroscopic plus material is formed by blending an antibacterial modified polyester fiber, a cotton fiber, a modal fiber, an apocynum venetum fiber, a bamboo fiber and a viscose fiber, wherein the cotton fiber is driedfor use after being soaked through antibacterial feed liquid. A bamboo charcoal particle, nano titanium oxide, magnetite powder, lignin powder, boric acid powder, benzalkonium chloride powder and diatomite powder are added into the antibacterial modified polyester fiber. The plus material for the socks, which is provided by the invention, is used for inhibiting a bacterium and is good in hygroscopic property and conformable and healthy to use through the joint action of the antibacterial modified polyester fiber, the modal fiber, the viscose fiber, the apocynum venetum fiber, the bamboo fiberand the cotton fiber which is coated with the antibacterial feed liquid.

The invention discloses a biomimetic preparation method for a passivation layer on the surface of a crystalline silicon solar cell, comprising the following steps of: performing pre-treatment on a silicon slice; adding silica powder, deionized water and boric acid powder in hexafluorosilicic acid solution respectively, and preparing silica deposition solution; and soaking the pre-treated silicon slice in the prepared silica deposition solution, keeping the temperature of the solution in a range from 20 to 80 DEG C, illuminating for 0.5 to 6 hours with an illumination intensity equivalent to the intensity of 0.5 to 3 suns, and depositing on the surface of the silicon slice so as to generate a silica thin film. The biomimetic preparation method disclosed by the invention has the following beneficial effects that a dangling bond on the surface of the silicon slice is passivated well, thus effectively prolonging the minority carrier lifetime and increasing the open-circuit voltage of the crystalline silicon solar cell, increasing the photoelectric conversion efficiency of the crystalline silicon solar cell, and decreasing the production cost of the crystalline silicon solar cell.

The invention relates to a preparation method and applications of boron quantum dots, and belong to the technical field of preparation of quantum dots. The preparation method comprises: dispersing boron powder in an organic solvent, and stirring uniformly to obtain a mixed solution containing boron particles; adding a hydrogen peroxide solution and boric acid powder, and carrying out high-energy ultrasonic breaking to obtain a primary product solution; and adding sodium borohydride, and carrying out centrifugation to obtain the boron quantum dots. According to the present invention, the boronquantum dots are prepared by using the boron powder as the boron source for preparing fluorescent boron quantum dots and using the organic solvents isopropanol and tetrahydrofuran as the double-drivechemical etching agent through the high-energy ultrasonic breaking assisted liquid phase stripping method, have characteristics of uniform size and slight green fluorescence, can be used as a boron-containing drug for boron neutron capture therapy, and has large-scale production potential and broad commercial application prospects.

The invention relates to the technical field of bath towel fabrics, and in particular to an antimicrobial and moisture-absorbing bath towel fabric. The bath towel fabric is formed by blending antimicrobial modified polyurethane fibers, polyethylene terephthalate fibers, cotton fibers, apocynum venetum fibers and bamboo fibers, wherein the cotton fibers become available as being soaked in antimicrobial material liquid and dried; and the antimicrobial modified polyurethane fibers are added with nano bamboo charcoal particles, nano titanium oxide, magnetite powder, lignin powder, boric acid powder, benzalkonium chloride powder and diatomite powder. The bath towel fabric provided by the invention, through combined actions of the antimicrobial modified polyurethane fibers, the apocynum venetumfibers, the bamboo fibers and the cotton fibers coated with the antimicrobial material liquid, can inhibit the generation of bacteria, and moreover, the bath towel fabric is good in moisture-absorbingperformance and is comfortable and healthy to use.

The invention discloses an X ray fluorescence spectrum micro sample preparation and a preparation method thereof, which comprises the following steps: boric acid powder is punched, formed in a standard mold, and made into boric acid tablets; and then the diameter and the depth of the holes of samples are determined according to the number of the samples to be tested and the quantity of each kind of detected samples; a drilling device which has the equal diameter with the holes of the samples is selected; a plurality of sample wells which are uniformly distributed or symmetrical, or unevenly distributed or unsymmetrical are bored on the boric acid tablets along the circle less than the excircle diameter of the boric acid tables and the bottoms of the sample wells are impervious; then each kind of different samples to be tested are loaded into the corresponding sample wells, compressed and planished; finally, the sample preparation is put on the X ray fluorescence spectrometer for detecting and analyzing. The invention can detect and analyze micro samples, has the advantages of large measuring strength, high sensitivity, simultaneously continuous analysis on a plurality of samples, saving usage amount of boric acid, simple operation, high detection efficiency, etc.

The invention provides a flower nutrient solution and a preparation method thereof. The flower nutrient solution mainly comprises the following ingredients: urea, monopotassium phosphate, calcium sulfate, magnesium sulfate, zinc sulfate, ferric sulfate, copper sulfate, manganese sulfate and boric acid powder. The flower nutrient solution has moderate pH value and comprehensive and balanced nutrients, is nontoxic, odorless and harmless to the people, and can meet the nutrient requirements of each growth period of the flowers in a year so that the leaves of the flowers are deep green, the flowers are big and have beautiful colors, the fruits are big and shiny, the crowns are full and the flowers are disease-resistant and insecticidal.

The invention relates to an aluminium borate composite porous ceramic and method for preparation, which comprises mixing aggregate with mixed powder by the weight ratio of 20-90/10-80, charging 1-6 wt% anchoring agent, mixing and forming, drying 20-30 hours at 90-120 deg. C, elevating temperature to 200-500 deg. C then thermally insulating 20-280 minutes, then elevating temperature to 700-1700 deg. C then thermally insulating 30-600 minutes, naturally cooling, wherein the process for preparing the mixed powder comprises, mixing fines containing aluminium compounds with boracic acid powder, thus obtaining AlxByOz, wherein x=16-22, y=2-5, z=30-36. The fines comprise Al2O3, Al2O3.3H2O and Al2O3.H2O by the proportion of 0-70 wt%, 0-80 wt% and 0-70 wt%.

The invention relates to the technical field of protection and control materials, and in particular relates to 10B boron carbide and a preparation method thereof. In the 10B boron carbide, the content of B4C is 97wt%, the content of B2O3 is 0.3wt%, the content of free boron is 1.3wt%, and 10B abundance is 25-99% (at.). The preparation method comprises the following steps: mixing 75-85 parts of boric acid powder with 25-99% (at.) of 10B abundance and 25-35 parts of high-purity graphite powder; pressing the mixed material into tablet particles with the diameter of 20mm and thickness of 10mm; respectively carrying out sectional roasting and dehydrating on the tablet particles at the temperature of 100-200 DEG C and 500-700 DEG C; and putting the roasted tablet particles in an induction heating furnace, or a graphite heating furnace or an arc furnace for carbonization at the carbonization temperature of 1855-2100 DEG C, thus the 10B boron carbide product meeting the quality requirement is obtained.

The invention is the magnesium alloy low-pressure casting method, which is to put the protective gas creator on the cover of the crucible or in the crucible that is in the pressure tank of the casting machine. The protective gas creator comprises: the protective agent 1, 2 and 3; the protective 1 is composed of sulfur powder and boric acid powder or of the mixing of sulfur powder, boric acid and magnesium sands; the protective agent 2 comprises sulfur powder or pyrite and carbon powder; the protective agent 3 is sulfur powder or pyrite, or the mixture of sulfur powder, pyrite and boric acid. The side wall of the container filled with the protective agent 1 has gas outlet and in the crucible; the protective agents 1 and 2 are in the open containers and on the crucible cover. The invention ensures the safe operation of the low-pressure casting, improves the quality of magnesium alloy cast, lowers the cost and reduces the environmental pollution.

The invention relates to a lining type container used for a precious metal crucible and a preparation method thereof. According to the technical scheme, boronic acid powder and lithium carbonate powder are evenly mixed according to the mole ratio of 4:1 to obtain mixed powder; then, pure water is sprayed to the mixed powder, the sprayed pure water accounts for 0.1-2 wt% of the mixed powder, stirring is carried out till mixing is uniform, and a mixed material is obtained; the obtained material stands still under the condition of 10-40 DEG C till the mixed material accounts for 82-88 wt% of the mixed material before still standing, and a lithium tetraborate half-dry material is obtained; then the lithium tetraborate half-dry material is formed to obtain a crucible lining container blank; finally, the crucible lining container blank is placed in an oven, dried for 2-3 hours under the condition of 105 DEG C and sintered for 1-3 hours under the condition of 700-850 DEG C; cooling is carried out, and the lining type container used for the precious metal crucible is obtained. The container has the advantages that energy consumption is low, manufacturing is easy, the production period is short, equipment utilization efficiency is high, cost is saved, and the precious metal crucible is long in service life.

The invention provides a method for improving ablation resistance of a boron-containing phenolic resin-based composite material. The method comprises the following steps of 1, breaking boron-containing phenolic resin, carrying out sieving, and mixing the boron-containing phenolic resin powder with boron oxide powder or boric acid powder by a solid phase method or a liquid phase method to obtain a uniform mixture according to a mass ratio of 1: 1 to 9: 1, wherein the solid phase method comprises ball milling mixing for 12-36h and the liquid phase method comprises dissolving the boron-containing phenolic resin in an organic solvent and carrying out stirring and mixing for 1-5h by a magnetic stirring device, 2, carrying out pre-treatment on the uniform mixed powder or slurry and carrying out grinding and sieving, and 3, molding the composite powder by a gradient heating molding technology, carrying out cooling in a furnace, and carrying out pressure-release demolding. Low-density and low-melting point boron oxide or boric acid powder is used as a filling material and the boron-containing phenolic resin-based composite material is prepared by physical blending hot mold pressing. The boron-containing phenolic resin-based composite material can keep a high heat retention rate, mechanical strength and size stability at a high temperature, has good heat protection performances and ablation resistance and can be used in the field of high-temperature thermal protection materials.

The invention discloses a method for preparing a spinel whisker/aluminum composite block material by in-situ growth in an aluminum matrix. The process of the method comprises the following steps: mixing aluminum powder, magnesium powder and boric acid powder and adding to a stainless steel jar mill with zirconium oxide balls for ball milling pretreatment; after adding the aluminum powder to the ball milling prepared powder, mechanically mixing to prepare fully mixed powder, and adding the fully mixed powder to a mold for pressure molding under certain pressure; and putting the molded block into a quartz heating furnace, and calcining at constant temperature under argon shield to obtain the spinel whisker/aluminum composite block material. The method has simple process, the spinel whisker in the aluminum matrix simultaneously grows in situ in the block sintering process, the whisker and the matrix combine tightly, the production rate of the whisker is stable, the whisker is distributed evenly in the aluminum matrix, the hardness and wear resistance of the whisker/aluminum composite block material are obviously improved, and the whisker/aluminum composite block material has good over-all properties.

The invention discloses lubricating grease special for gears and racks of an automobile steering device and a preparing method of the lubricating grease. The lubricating grease is prepared from, by mass, 60-85% of base oil, 7-15% of C12-C22 monoprotic organic acid, 0.2-1.0% of boric acid, 1.3-2.5% of lithium hydroxide monohydrate powder, 0.5-1.0% of antioxygen, 0.3-1.0% of antirust agent, 0.5-2.0%of dialkyl dithiophosphate and 1.5-3.0% of dialkyl thiocarbamate, wherein the C12-C22 monoprotic organic acid, the boric acid and the lithium hydroxide monohydrate powder serve as thickening agents,and the antioxygen, antirust agent, dialkyldithiophosphate, dialkyl dithiophosphate and dialkyl thiocarbamate serve as additives. Compared with the prior art, the lubricating grease has the followingadvantages that a contactor and a pressure reaction still are adopted for saponification, lithium hydroxide powder and boric acid powder are directly adopted instead of corresponding aqueous solutions, the trend of still overflowing in the production process is avoided, a large number of dehydration steps are omitted, the efficiency of the saponification reaction is greatly improved, and the production time is shortened; meanwhile, the technology is more controllable, and the product quality is stable.

The invention belongs to the technical field of inorganic functional materials and provides a method for preparing high-purity spherical instant boric acid by induction of organic molecules. The high-purity spherical boric acid with no aggregation is prepared by: dissolving analytically pure boric acid or industrial boric acid in a hot solvent which is a mixture of water with a lower alcohol, ketone, ether or acid with carbon number of less than 4, cooling the boric acid solution based on the solubility and surface free energy control principle, adjusting exposed crystal face of boric acid crystal and morphology of aggregated particles by inducing crystallization via organic molecules so that recrystallized boric acid microspheres are separated from the oversaturated solution, carrying outsuction filtering, and drying. Instant spherical boric acid powder prepared via the method is simple to operate, the technical conditions are easy to control, consuming a surfactant or aid is not required, material utilization rate is high, and the finished product has high purity. The problems are solved that, for instance, the traditional common boric acid has low dissolving speed and cakes easily.

The invention discloses a preparation method of carbon nanotube toughened boron carbide ceramic, which belongs to the technical field of composite materials. The preparation method of the carbon nanotube toughened boron carbide ceramic comprises the following steps: S1, uniformly mixing carbon nanotubes and carbon black in proportion, putting a mixture into a synthesis cavity, and putting boric acid powder into a preheating cavity; S2, continuously introducing inert gas into the synthesis cavity from the preheating cavity, then heating the synthesis cavity to a set temperature, then heating the preheating cavity to a set temperature, and carrying out a reaction; S3, naturally cooling to room temperature, opening the synthesis cavity, and taking out the high-purity boron carbide/carbon nanotube composite material; and S4, adding water and glucose into the high-purity boron carbide/carbon nanotube composite material, carrying out ball milling, uniformly mixing, carrying out spray granulation, carrying out cold press molding, and carrying out vacuum hot press sintering to obtain the high-toughness and high-hardness carbon nanotube toughened boron carbide ceramic. According to the method, the carbon nanotube toughened boron carbide ceramic can be efficiently prepared.

The invention discloses a dry magnesia carbon material which consists of waste magnesia carbon brick particles with the particle size ranges of 0.3-1 mm and 1-3 mm, magnesia matrix, phenolic resin powder, boric acid powder and so on, wherein the weight of the waste magnesia carbon brick particles with the particle size range of 0.3-1 mm accounts for 25-35% of the total weight of the raw materials; the weight of the waste magnesia carbon brick particles with the particle size range of 1-3 mm accounts for 40-50% of the total weight of the raw materials; the weight of the magnesia matrix accounts for 13-30% of the total weight of the raw materials; the weight of the phenolic resin powder accounts for 1-4% of the total weight of the raw materials; the weight of the boric acid powder accounts for 0.5-1.5% of the total weight of the raw materials. The dry magnesia-carbon material has the advantages that remaining waste magnesia carbon bricks after steel ladle using are used to replace magnesia aggregate, so that not only can waste and old materials be reused, but also the enterprise production cost is greatly reduced; in addition, the produced continuous casting tundish working layer lining is excellent in anti-scouring and anti-erosion properties, so that the production safety is improved.

The invention discloses a composite calcium-sulfonate-based lubricating grease composition and a preparation method thereof. The preparation method comprises: filling high-alkalinity calcium sulfonate serving as a cleaning agent and methanol into a reaction kettle, heating to 80 to 100 DEG C, and after the mixed material is thick, adding calcium hydroxide powder, boric acid powder, C12 to C16 dicarboxylic acid and stearic acid at 90 to 100 DEG C to perform a saponification for 30 minutes; after saponification is finished, raising the temperature, keeping the temperature constant at 130 to 140 DEG C for 1 hour, slowly raising temperature to 220 to 225 DEG C, keeping the temperature constant for 5 to 10 minutes, and performing thickness regulation and homogenization treatment by using 4 to 78.6 percent base oil, wherein keeping the homogenization temperature between 100 and 120 DEG C; and when the thickness is proper, reducing temperature to 80 to 90 DEG C, filling when the temperature drops to 40 to 60 DEG C, and obtaining the finished composite calcium-sulfonate-based lubricating grease composition. The lubricating grease provided by the invention has high high-temperature resistance; leakage experiments carried out in accordance with ASTM D4290 and ASTM D1263 (SH/T0326 industrial standards) prove that the leakage range of the lubricating grease is within 5 to 10; and the retaining property of the lubricating grease in friction pair can be improved, and the operation reliability of the equipment can be guaranteed.

The invention relates to the technical field of plant cultivation, in particular to mosquito-repelling flower hydroponics nutrient solution, made from 6-8 parts of ammonium sulfate, 8-10 parts of urea, 6-8 parts of zinc sulfate, 6-8 parts of boric acid powder, 3-5 parts of an enzyme preparation, 6-8 parts of trace elements, 3-5 parts of betel nut, 2-4 parts of dried ginger, 5-7 parts of smoked plum, 6-8 parts of Chinese rhubarb rhizome, 3-5 parts of hawthorn, 2-4 parts of Cyrtomium rhizome, 2-4 parts of sodium cocoate, 3-5 parts of sodium palmitate, 2-4 parts of dodecyl polyglucoside, 2-5 parts of alkyl glycoside, 2-4 parts of fennel, 2-4 parts of Sichuan pepper, and 80-100 parts of deionized water. A formula of the solution is scientific, the solution is safe and pollution free and provides various required nutrient elements for flower plants to grow, the problem that hydroponic flower plants are commonly in shortage of nutrition during growth is effectively solved, biological enzymes contained in the solution are effective in degrading organic acids secreted by plant roots and rotten substances in water, and with the added Chinese herbs, and the solution is an effective pest repellent, effective preparation ensuring environmental sanitation and ideal choice of hydroponics nutrient solutions and is convenient to popularize.

The invention provides a special fertilizer for walnuts and belongs to the technical field of agricultural chemical fertilizers. The special fertilizer comprises the following main components: calxes (silicate slag), grass carbon powder, urea, powdered rock phosphate, boric acid powder, potassium nitrate, calcium chloride, zinc sulfate, magnesium sulfate, manganese sulfate, iron sulfate and copper sulfate, wherein all the nutrient elements are prepared into the special fertilizer in proportion by weight. The special fertilizer provided by the invention, serving as a base fertilizer, is reasonable in nutrition collocation, can fully meet requirements of walnut trees on various nutrient elements after being applied, is lasting and efficient in fertility, can improve the soil structure and control root diseases and insect pests, and can obviously improve the yield and quality of fruits.

The invention discloses an ivory white ceramic glaze with a self-cleaning function and a preparation method of the ivory white ceramic glaze. The ivory white ceramic glaze comprises 25-35 parts of silicon dioxide, 20 to 30 parts of melilite; 20-25 parts of kaolin, 10-16 parts of boric acid powder, 10-15 parts of calcite, 15-20 parts of kapok clay, 15-20 parts of glaze stone, 10-20 parts of talcumpowder, 15-20 parts of aluminum oxide, 2-8 parts of zinc oxide, 2-5 parts of tin crystal materials, 2-6 parts of magnesium carbonate, 1-4 parts of calcium carbonate, 0.8-1.8 parts of diboron trioxide,2-5 parts of lime glaze and a composite antibacterial powder. The ivory white ceramic glaze has the beneficial effects that repeated washing by using a cleaning agent and water is greatly reduced, the ivory white ceramic glaze has a strong self-cleaning function, and the ivory white ceramic glaze with quick and lasting antibacterial performance and a good self-cleaning function can be obtained.