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Physical preparation of nano powders

Nano powders, also known as nanoparticles, generally refer to ultrafine particles between 1 and 100nm in size. Some people call them ultrafine particles. It is larger than a cluster of atoms and smaller than ordinary particles. In terms of its size, assuming that each atom is one angstrom in size, it contains between 1000 and 1 billion atoms. It’s smaller than a normal living cell, about the size of a virus. Nanoparticles are spherical, plate-like, rod-shaped, angular, spongy and [...]

Research and application of aluminum nitride and aluminum nitride ceramics

Aluminum nitride (AlN) is a kind of integrated high performance new ceramic material, has excellent thermal conductivity, a reliable electrical insulation, low dielectric constant and dielectric loss, non-toxic and match the silicon thermal expansion coefficient, and a series of excellent features, is considered to be * * a high degree of the semiconductor substrate and the ideal of the electronics packaging materials, wide attention by the researchers at home and abroad. In theory, the thermal conductivity of AlN is [...]

How to analyze the fiber strength of potassium titanate whisker

In recent years, potassium titanate whisker achieved breakthrough on the manufacturing cost, combined with the diverse, more and more attention, the performance is very excellent after wear test proves that the potassium titanate whisker reinforced material products even after wear test its surface finish and no big change, potassium titanate whisker was originally by NASA as Saturn rocket nozzle of insulation material development. In view of the rocket launch a flushing high temperature and high pressure air flow, filling [...]

To introduce the preparation of strontium titanate

Research progress of preparation methods of strontium titanate at present, the main preparation methods of strontium titanate are sol thermal method. Sol-sol-whether in metallic materials, or in organic and inorganic non-metallic materials, adding appropriate amount of strontium and its compounds can change some of its properties and even make it have special functions, so it has the name of metal monosodium glutamate. Strontium titanate (SrT iO 3) is one of the important strontium compounds. Strontium titanate has the advantages of [...]

Study on oxygen vacancy of rare earth elements (cerium, scandium) and zirconia and its application

The formation mechanism of oxygen vacancy in zirconia doped cerium oxide (ZDC) and scandium oxide stabilized zirconia (ScSZ) was studied. At present, ZDC materials have been used in the manufacture of automobile exhaust catalysts, but there is a lack of systematic research on the formation of oxygen vacancy and thermodynamic mechanism and quantitative analysis of related parameters. In this paper, the effects of zirconia doping ratio on oxygen vacancy of ZDC materials at different temperatures and oxygen partial pressures [...]

New developments in several hot areas of nanomaterials

1. design and research of nano-assembly system At present, the research object is mainly focused on the nanoarray system. Nano-mosaic system; Mesoporous and nanoparticle composite system and nanoparticle membrane. Purpose is according to the need to design a new material system, explore or improve the performance of the material, the target is the preparation for the production of nano device, such as high brightness solid electronic display, nanocrystalline diode, vacuum ultraviolet to the near infrared especially in the light of [...]

Synthesis and characterization of nanometer zirconia powders

Zirconia has excellent mechanical, thermal, optical and electrical properties and is widely used in high-temperature structural materials, high-temperature optical elements, thermal sensors and fuel cells. There are many preparation methods of zirconia, including mechanical chemical ball mill method, tube ion technology sol-gel method, co-precipitation method, hydrothermal method and microwave hydrothermal method, etc., among which sol-gel method is favored for its simple process, room temperature operation, high product purity, good particle uniformity and other advantages. 1 experimental part 1.1 reagents and instruments Zirconium [...]

Vanadium dioxide VO2 powder technology and research status

The intelligent temperature control coating is a coating that transmits infrared light at low temperatures and reflects infrared light at high temperatures. The research status of VO2 and its doped powder and the intelligent temperature control coating based on VO2 powder are introduced. Proposed its future development trend. Key words: VO2 powder; phase change performance; intelligent temperature control coating When the sun shines on the surface of the object, the object mainly absorbs the near-infrared light energy to increase its surface [...]

The structure of pigment and dispersant and the function of dispersant

1, the introduction Coating is widely used in our daily life, and plays a protective, decorative and special role in the painted parts. The coating is mainly composed of film-forming substances (resin), fillers, additives and solvents (or water). With the development of industry and the improvement of living standards, pigments are more and more used in the paint and ink industry to give a better appearance. Unlike dyes, pigments are generally insoluble in the medium used and, in most cases, [...]

Method for the preparation of strontium titanate

Research progress of preparation methods of strontium titanate at present, the main preparation methods of strontium titanate are sol thermal method. Sol-sol-whether in metallic materials, or in organic and inorganic non-metallic materials, adding appropriate amount of strontium and its compounds can change some of its properties and even make it have special functions, so it has the name of metal monosodium glutamate. Strontium titanate (SrT iO 3) is one of the important strontium compounds. Strontium titanate has the advantages [...]