Technical Support

05 2月

Preparation of nickel silicide nanowires

The molecular weight of nickel silicate is 145.51, the melting point is 1309℃, and the relative density is 7.217. Nickel silicate dissolves rapidly in hydrofluoric acid, slowly in hydrochloric acid, and insoluble in water. Nickel silicate reacts violently with fluorine at room temperature to white heat, and chlorine gas reacts with red heat. Nickel silicate decomposes in aqua regia. Method: The silicon oxide, nickel oxide (Ⅱ) and aluminum can be heated in the blast furnace. Metallic silicide has low resistivity, [...]

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29 1月

A test method for nickel chloride content hexahydrate

1. A test method for the content of nickel chloride hexahydrate is characterized in that the test method includes the following steps: a: take 1 volume of the liquid to be tested with a pipette to 5 volume volume bottles, add 1 volume of concentrated nitric acid, and then add 2 volume of ethylene glycol, and then use pure water to fill 5 volume parts to obtain liquid A; b: Take 1 liquid to be tested into a 5-volume [...]

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01 1月

Nano-ferric oxide and nano-ferric oxide

Nano iron oxide is produced by nano synthesis technology and high purity raw materials, with high purity, low impurity content, small particle size, uniform particle size, high temperature resistance, good dispersion and so on Nano ferric oxide is a new kind of nano material, which can be widely used in coating, paint, ink and chemical materials. Because of its small particle size, it has the characteristics of ultraviolet absorption, high chroma, high coloring power, high transparency, etc., and it is [...]

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25 12月

Properties and uses of cuprous oxide

1, Cuprous oxide can be dissolved in hydrochloric acid to generate HCuCl2 (cuprous chloride complex), can also be dissolved in sulfuric acid and nitric acid respectively to form copper sulfate and copper nitrate. 2. Although cuprous oxide is stable in dry air, it will be slowly oxidized in wet air to generate copper oxide, so it can be used as a deoxidizing agent; In addition, it is easy to reduce it to copper with reducing agent. 3, cuprous oxide is insoluble [...]

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17 12月

Properties and applications of nano-sized zinc ferrite

Ferrates of manganese, zinc, cobalt and nickel are important functional materials. Among them, Mn-Zn and Ni-Zn ferrite are the largest high frequency soft magnets in the world, which are commonly used as magnetic materials for high frequency transformers, inductors and recording heads. Ferrate is also an important catalyst, has been used in ammonia synthesis, Fischer-tropsch synthesis, as well as ethylbenzene, butene oxidation dehydrogenation reaction, it has broad application prospects in chemistry and chemical synthesis and other fields. Spinel zinc ferrite [...]

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04 12月

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 [...]

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26 11月

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 [...]

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20 11月

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, [...]

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06 11月

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 [...]

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24 10月

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 [...]

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