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13 Nov

Ruthenium trichloride was prepared from ruthenium containing waste

Preparation of Ruthenium trichloride directly from ruthenium-containing waste material Ruthenium trichloride is one of the most important compounds of ruthenium and is an important chemical raw material in the fields of heterogeneous catalysis, homogeneous catalysis, electroplating, coating and so on. A method of preparing ruthenium trichloride directly from ruthenium waste material was introduced. The process is simple, the cost is low, the operation is simple, and the direct yield of ruthenium is more than 90%. Ruthenium waste generally comes from [...]

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31 Oct

Recovery of potassium fluosilicate in the production of potassium fluotitanate

This technology provides a kind of fluorine in the production of potassium titanate recycling process of potassium fluosilicate, fluorine is obtained by hydrofluoric acid will react with titanium ore leaching of iron titanate slurry, solid-liquid separation are clarified the fluorine titanium acid leaching liquid iron, then add the potassium liquid cooling crystallization, solid-liquid separation of potassium fluosilicate solid and refined fluorine titanium acid leaching of iron liquid; Will be refined fluorine iron leaching liquid and potassium titanate liquid reaction [...]

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17 Oct

A method for preparing rhenium trichloride

Rhenium itself has no independent deposit, and is often dispersed in other non-ferrous ore bodies. It is mainly associated with molybdenite and mostly occurs in trace minerals such as molybdenum, copper, lead, zinc, platinum and niobium. Therefore, we should make full use of regional resources, give full play to regional advantages, and vigorously build the high-tech industry of scattered metals. A former Soviet union carbide plant, oxidizing roasting – sedimentation method to extract the rhenium: flue gas containing a Re2O7 [...]

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05 Oct

Sodium potassium niobate – bismuth sodium titanate solid solution structure

In recent years, great progress has been made in the lead-free conversion of electronic materials. Sodium potassium niobate (KNN) and bismuth sodium titanate (BNT) are the two most competitive components that are expected to partially replace the currently used lead zirconate titanate (PZT) component. KNN undergoes cubic, tetragonal, orthogonal and tripartite phase transitions from high temperature to low temperature; The phase transition behavior of BNT is relatively complex. From high temperature to low temperature, BNT experiences cubic, tetragonal and [...]

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27 Sep

Preparation and application of zinc telluride

Zinc telluride is a gray or brownish-red powder that is a compound of zinc and telluride, with the chemical formula ZnTe. Ruby cubic crystals can be obtained by sublimation. Stable in dry air, it breaks down when exposed to water, releasing foul-smelling and toxic hydrogen telluride gas. Zinc telluride is mainly used in semiconductors and infrared materials, can be used as fluorescence materials and phosphorescent materials, but also can make light emitting diodes, infrared detection, radiation detection materials. Zinc [...]

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13 Sep

A method for preparing molybdenum boride powder

Boride molybdenum compounds with high melting point, high hardness, wear resistance, high temperature resistant, corrosion candle and low coefficient of friction etc., plays a very important role in modern industry, are widely used in metal materials, coating materials, high temperature structural materials, the cathode material, corrosion resistant, wear resistant materials and other fields, and with the progress of science and technology, The application field of molybdenum-boride compounds will be further expanded, and this material will show more excellent application [...]

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30 Aug

Brief analysis of calcium tungstate

From the chemical composition point of view, with sodium tungstate (Na2WO4) and potassium tungstate (K2WO4) is different from the cation in calcium tungstate (Ca2+) is alkaline earth metal, so they are slightly different in structure, physical and chemical properties, production process and use. Note: Sodium and potassium are both alkali metals By definition, calcium tungstate, also known as “artificial tungstate”, is a tungstate consisting of regular divalent metal calcium ions (Ca2+) and tungstate ions [(WO4)2-]. It is a typical self-activating [...]

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24 Aug

Analysis of ammonium paratungstate

Also a kind of inorganic metal tungsten compound, ammonium paratungstate and ammonium metatungstate have certain differences in performance, production technology and application. First, the former is insoluble in water, the latter is easily soluble in water, and the aqueous solution is quite stable; Second, the former is the main raw material for the production of the latter; Third, the former is mainly used to produce tungsten products, the latter can be used to produce tungsten products, but also can [...]

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18 Aug

Preparation of superfine tungsten carbide

In recent years, the methods of preparing ultrafine or nanometer WC powder mainly include: mechanical alloying, direct reduction carbonization, sol-gel, gas carbonization, fixed-bed chemical vapor method, plasma method, etc. Mechanical alloying Grahame, etc by mechanical alloying method, first the W powder mixes with C powder by atomic ratio 1:1, in the steel tube and argon gas is piped in, and then choose a diameter of 12 mm WC grinding ball, the ball material ratio of 18:1, finally in high-energy ball mill [...]

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10 Aug

Preparation of boron carbide nano powder and its epoxy coating

Boron carbide is a kind of super-hard compound in nature. In normal state, its hardness is second only to diamond and cubic boron nitride, and it is hardest at high temperature (about 1000 degrees Celsius). At the same time, boron carbide is a kind of P-type semiconductor with excellent thermal conductance. Most importantly, it is particularly resistant to acid and alkali corrosion. Because of various advantages, the industry has been trying to use boron carbide as a coating material. But [...]

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