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02 5月

A preparation method and process of nano-holmium oxide

The main uses of holmium oxide are :(1) yttrium aluminum garnet doped with holmium (Ho∶YAG) can emit 2μm laser, human tissues to 2μm laser absorption rate is high, almost 3 orders of magnitude higher than Hd∶YAG. Therefore, the Ho∶YAG laser can not only improve the efficiency and precision of surgery, but also reduce the thermal damage area to a smaller extent. (2) A small amount of holmium can also be added to the magnetostrictive alloy Terfenol-D to reduce the [...]

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22 4月

Discussion on the properties of aluminum nitride

Aluminum nitride (AlN) is a kind of advanced ceramic material with excellent comprehensive performance. It is a kind of new packaging material which is favored by domestic and foreign experts. It is also recognized as the most promising high thermal conductivity ceramic material at present. Research on it began more than a century ago, but it was only used as a nitrogen-fixing fertilizer. As a covalent compound, aluminum nitride is difficult to be sintered due to its high melting [...]

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14 4月

Manufacturing method of nano cobalt oxide

For the gradual maturity and stability of nanotechnology required nano-level items are also more and more, but for nano-level cobalt oxide should be how to make it, with the xiaobian take a look! (1) Preparation of cobalt salt solution: use nitric acid or sulfuric acid to dissolve cobalt metal to generate cobalt nitrate or cobalt sulfate aqueous solution after measuring the cobalt content in the solution of 50~ 300 g/l and free acid control in 20 g/l or less can [...]

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31 3月

Nano tantalum oxide used in radiotherapy and chemotherapy

Today, cancer remains one of the world’s deadliest diseases, with more than 10 million new cases diagnosed each year. The main cancer treatment methods including surgery, chemotherapy and radiotherapy have been widely used in clinical practice, but they all have their own defects. For example, the toxic side effects of chemotherapy and the low absorption efficiency of radiation at the tumor site. Chemo-radiotherapy (radiotherapy) has been widely used in clinical trials in recent years, and a large number of [...]

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12 3月

Preparation method and process of lanthanum acetyl acetonate

China is rich in rare earth resources and has the largest reserves in the world. Acetylacetone rare earth complexes have wide application prospects in new luminescent materials, extraction chemistry, displacement reagents, especially stabilizers for plastic processing. In the past, the production process of lanthanum acetyl acetonate adopts solution precipitation method and solution extraction method. These two methods not only consume solvent, but also affect the yield and the performance of the functional complex. In the actual production process, it is [...]

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18 1月

The invention relates to nano praseodymium oxide lubricating oil additive

The technical problem to be solved by the invention is to provide an energy saving and environmental protection rare earth lubricating oil additive. The rare earth lubricant additive has good wear resistance and self – healing properties. In order to solve the above technical problems, the invention provides a nano praseodymium oxide lubricating oil additive, which is characterized in that it contains nano praseodymium oxide after surface modification. Preferably, the lubricating oil additive preparation materials include: Nano praseodymium oxide 15wt. %; Surfactants 85wt. [...]

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23 11月

Electrocatalyst based on nano niobium dioxide for nitrogen reduction

Ammonia is the largest chemical product produced on earth, with an annual production of more than 150 million tons, and has been synthesized by the Haber-Bosch process for more than 100 years. However, the Haber-Bosch process uses hydrogen derived from natural gas reforming to reduce nitrogen under high temperature and pressure, so it is a process with high energy consumption and CO2 emission. However, the electrochemical nitrogen reduction reaction (NRR), which directly uses water and nitrogen as raw materials [...]

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28 9月

Preparation and synthesis of cesium carbonate

Cesium carbonate is an inorganic compound. White solid at room temperature and pressure. It is soluble in water and absorbs moisture quickly when exposed to air. Cesium carbonate aqueous solution is strongly alkaline and can react with acid to form the corresponding cesium salt and water, and release carbon dioxide. Cesium carbonate should be sealed, dried and kept separate from acid during storage. Preparation and synthesis: 1. Prepare sulfuric acid solution of cesium salt, add aluminum sulfate to it, and precipitate [...]

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22 7月

Why is silicon nitride ceramic substrate a world-class strategic product?

It is well known that the heat generated by the semiconductor devices work is the key factor that causes for the failure of semiconductor devices, and the thermal conductivity of the insulating substrate is the key to affect the whole semiconductor cooling device, in addition, due to the often face the complex mechanics environment such as turbulence, vibration, substrate material also need certain mechanical reliability, silicon nitride ceramic various aspects performance is balanced, It is a structural ceramic material [...]

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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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