Articles

06 5月

Preparation of zirconium carbide nanomaterials from waste plastics

Zirconium carbide, as an ultra-high temperature ceramic material, has excellent physical and chemical properties, such as high hardness, high melting point, high wear resistance, low vapor pressure, low resistivity, good chemical stability and thermal stability. At present, The method of preparation of zirconium carbide is mainly with zirconium dioxide reaction with carbon reduction synthesis (J.M ater. Sci., 2004,39,6057-6066.), sol-gel (j. ur. Ceram. Soc., 2007,27,2061-2067.) and chemical vapor deposition (Appl. Surf. Sci., 2015332591-598, Surf. Coat. Technol., 2008203,87-90.) method. Industrial preparation [...]

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29 4月

Preparation technology of nano bismuth oxide

For the preparation of nano bismuth oxide, the main methods include plasma method, melt spray oxidation method, chemical vapor condensation method, sol-gel method, chemical precipitation method, etc. Each method has its own characteristics. The plasma method has the advantage of short process, but requires special equipment, one-time investment, high cost; Melt spray oxidation process is short, but there are some problems such as incomplete bismuth oxidation, short nozzle life, dangerous operating environment, etc. Chemical vapor condensation method has high [...]

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22 4月

What are the characteristics and uses of nano-zirconium carbide?

Performance Characteristics 1. High purity, small particle size, uniform distribution, large specific surface area, high surface activity, low loose packing density. 2 with high temperature resistance, oxidation resistance, high strength, high hardness, good thermal conductivity, good toughness. 3. Zirconium carbide is an important high melting point, high strength and corrosion resistance of high temperature structural material, and has the characteristics of high absorption of visible light, reflection of ultraviolet light and energy storage. Main Use 1. New thermal insulation textile: nanometer ZRC has the [...]

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16 4月

Plasma treatment to improve the quality of nano bismuth oxide

Bismuth oxide is an important functional powder material, widely used in inorganic synthesis, electronic ceramics, chemical reagents and other fields, mainly used in the manufacture of ceramic dielectric vessels, can also be used in the manufacture of piezoelectric ceramics, varistors and other electronic ceramic components. Due to the finer particle size of nanometer bismuth oxide, in addition to the properties and applications of bismuth oxide powder with general particle size, it can also be used in occasions with special particle [...]

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01 4月

Nanometer magnesium hydroxide for nanoscale materials

Nano magnesium hydroxide can also be used to save fertilizer? Recently in zhengzhou held a “nanometer magnesium hydroxide fertilizer application technology” scientific and technological achievements appraisal meeting, nanometer magnesium hydroxide fertilizer synergist recognized by experts, experts agree that the technology has obvious economic benefits and social benefits. By zhao yufen academician, director of the national committee of xiamen university, south China agricultural university professor liao and henan academy of agricultural science and technology ke-gang sun researcher, deputy director of the [...]

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22 3月

Analysis method of vanadium pentoxide

Wage sample 0.1g (weigh to 0.0001g) in 300ml triangular conical flask, add 1:1 sulfuric acid 5ml, add a little steaming water, heat and dissolve, take off, add 3:1: 1 sulfur phosphate 15 ml, drops of 10% ammonium ferrous sulfate solution to a green, cool to room temperature in cold water with 3% potassium permanganate oxidation to solution is slightly red don’t disappear, then add about 1 gram of solid urea with 1% sodium nitrite is original to solution is [...]

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15 3月

Preparation of hexagonal flake nano magnesium hydroxide materials

Magnesium hydroxide is a kind of green, low-cost and environment-friendly inorganic additive flame retardant. It has the advantages of good thermal stability and non-toxicity. It can be widely added to polymer materials such as plastics, rubber and coatings to improve their flame retardant properties. However, the hexagonal flake-like nanometer magnesium hydroxide material with small particle size and low surface polarity has good dispersibility and nanometer activity. In the case of almost no impact on the use of strength, can [...]

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09 3月

Application and prospect of boron nitride nanomaterials

The purpose of preparation and characterization of boron nitride nanomaterials is to improve the properties of traditional boron nitride materials, give full play to their various effects at the nanoscale level, achieve expected excellent properties and expand new application fields. 1, boron nitride coating has obvious chemical inertia at high temperature, so that boron nitride coating can be used to protect aluminum, magnesium, zinc alloy and other materials from high temperature oxidation. When coated with refractory or ceramic ware, [...]

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03 3月

Hafnium carbide ceramic material additive

At present, the method of synthesis of hafnium carbide at home and abroad is not much reported, the original method, generally need to be above 1900℃ to react, high energy consumption, high requirements for equipment, and grow out of the particle size, need to use other methods to reduce the reaction temperature. (2) Liquid phase precursor conversion method. Wang Yanbin et al. used HfoCl2, HCl, HNO3, n-propanol, isopropanol, ethanol, acetyl and other HFC powders with sizes ranging from tens [...]

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23 2月

Preparation of high purity praseodymium chloride anhydrous by programmed temperature rise method

The purpose of the invention is to provide a program speed temperature control the preparation of high purity anhydrous praseodymium chloride or neodymium chloride, the method in the industrial scale of high purity anhydrous praseodymium chloride or neodymium chloride products, including water content is less than 0. 1%, the product is added to water dissolved immediately, dissolved after solution clear transparent, product purity is more than 99%, the yield more than 99%. Technical solutions will directly out of the [...]

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