Technical Support

Role and application of niobium carbide

Niobium carbide is a green cubic crystal with metallic luster, belonging to the sodium chloride cubic crystal system. It has high melting point, high hardness (microhardness 235GPa, harder than corundum), good chemical stability (stable at 1 000~1 100℃, and rapid oxidation into niobium pentoxide above 1 100℃), insoluble hydrochloric acid, sulfuric acid and nitric acid, A mixture of hot hydrofluoric acid and nitric acid soluble only. Niobium carbide is easy to melt in titanium carbide, zirconium carbide, tungsten carbide [...]

Determination of vanadium content in vanadium carbide

Vanadium carbide is an important alloy additive, which can improve the corrosion resistance, wear resistance, strength and other comprehensive properties of hard alloys, so it is widely used in alloys. At present, the main methods for the determination of high vanadium content are REDOX titration, inductively coupled plasma atomic Emission spectrometry (ICP-AES), X-ray fluorescence spectrometry and spectrophotometry, but they all have their shortcomings. Chemical titration is widely used because of its high accuracy, easy to master and low operating [...]

Preparation and application of lanthanum manganate

Composite oxides are widely used as catalysts in modern chemical industry because of their excellent oxidation/reduction properties, high mechanical strength and good thermal stability. Among them, perovskite compound oxide is particularly eye-catching. Since the 1950s, perovskite-type composite oxides have been used in catalytic combustion, photocatalysis, fuel cells and metals Air cell, environmental catalysis, catalytic hydrogenation, catalytic cracking and so on have been widely used and studied. At present, there are many methods used to synthesize perovskite, such as coprecipitation method, [...]

Method for preparing subnickel oxide from nickel precipitate

The invention relates to a method for preparing subni oxide by reusing nickel precipitate. Firstly, the unqualified products produced by solution precipitation are screened to obtain a part of nickel precipitate with diameter > 5.0μm and a part of nickel precipitate with diameter ≤5.0μm. Then sediment diameter of 5.0 microns or less nickel and nickel salt solution to join the spray pyrolysis device, spray reaction, resulting atomized droplet during spray contains nickel deposits, in the pyrolysis reaction, nickel salt [...]

Methods for the production of molybdenum carbide

1. Programmed temperature reduction method Temperature programmed method is put forward in the eighty s is still the most widely used in a laboratory for the means of the MoC, the reaction experiment, molybdenum oxide is used as the source of molybdenum, hydrocarbon gas and hydrogen were used as the basis of carbon dioxide gas and reduction of materials, and temperature rising slowly to ensure in balance in the process of catalytic reaction speed, the composition and content of the [...]

Application and synthesis of niobium pentachloride

Application of 1 A Niobium pentaoxide/RGO nanocomposite anode material with stable structure, good electrical conductivity, excellent rate performance, simple preparation process, low energy consumption, low cost, and suitable for industrial production is prepared as follows: The preparation method of niobium pentaoxide/rgo composite anode material includes the following steps :(1) the go nanosheet is mixed with water, stirred, and dispersed by ultrasound to obtain the dispersed solution of go nanosheet; (2) niobium chloride (V) dissolved in water, stirring, niobium pentachloride suspension, to [...]

Effect of potassium titanate on friction properties of NAO

NAO friction material has still become the most popular disc brake pad material. With the increasing maturity of friction material industry, the raw material market has also changed with each passing day. The application of potassium titanate also provides a new path for the development of friction materials. In this study, a single factor comparative experiment was adopted. By adjusting the ratio between potassium titanate and barite powder, the increasing gradient of potassium titanate was 2% (mass fraction, and [...]

A modification method of nano-samarium oxide MC nylon

MC nylon is a new type of engineering plastic, which is made of caprolactam as the main raw material by anion polymerization under atmospheric pressure. MC nylon is gradually replacing copper, aluminum, steel and other metal materials and is widely used in textile, rubber, petrochemical, steel rolling, mining machinery, automobile, elevator, crane and other industries. But compared with metal, MC nylon has some disadvantages such as lower strength, modulus and thermal deformation temperature, larger water absorption rate and poor [...]

Main uses of hafnium carbide powder

Hafnium carbide (HfC) is a gray black powder, belonging to the face-centered cubic structure, with a very high melting point (3890℃), is known in the single compound with the highest melting point, is a good material for high melting point metal crucible lining. Hafnium carbide has high elastic coefficient, good electrical and thermal conductivity, very small thermal expansion coefficient and good impact resistance, very suitable for rocket nozzle material field, is also an important metal ceramic material. Hafnium carbide is a [...]

Preparation and application of magnesium nitride

Chemical formula of magnesium nitride Mg3N2, greenish yellow powder or lump, relative density of 2.712, decomposition at 800℃, sublimation at 700℃ in vacuum, magnesium nitride as ionic compound, rapid hydrolysis in water. Soluble in acid, insoluble in ethanol: magnesium nitride is widely used. Magnesium nitride is an indispensable sintering agent in the solid state reaction of boron nitride and silicon nitride, which are new ceramic materials with high hardness, high thermal conductivity, wear resistance, corrosion resistance and high temperature [...]