Production Process Of Atomized Bronze Powder

Production Process Of Atomized Bronze Powder

Bronze powder is an important raw material for the production and use of powder metallurgy products. Production of international industrial bronze powder began at 20 century. The production methods used at that time are restoring copper element and electrolysis. After 1950s, there are new production methods for bronze powder: replacement precipitation and hydrometallurgy new wrinkle. Then the atomization rote emerges.
In 1958, China began the trial of bronze powder ( FCu 663 ). It was about the production test of electrolytic bronze powder at that time. In the mid - 1960s, electrolytic bronze powder trial to be efficacious and put small cartel production. The mid - 1970s, China has proverbial a production line of the first electrolytic bronze powder. In the 1980s and 1990s, with the rapid development of China ' s national economy, the bronze powder was substantially major. In order to meet market demand, the number of immense enterprises by tapping the quiescent of innovation and technological transformation, the bronze powder production - community. In the meantime, have received and developed more than l0 bronze powder manufacturers, National bronze powder production capacity of about 4000t, annual average production is about 1400t.
Alternative to electrolysis in the production of bronze powder, when the devaluation of the atomization milling mode. Practice has proved that a single atomization production of bronze powder bulk density and empty-handed formability drawback in practical applications can not be replaced by electrolytic bronze powder. Accordingly, the use of water atomization, twofold with the subsequent treatment process, not unlike as redox developed to meet the environmental needs of low bulk density of bronze powder.
Industrialization atomized bronze powder production wise by gas atomization and water atomization channels. Production practice proves that the production effect of water atomization gas atomization. The twin particle size and particle size composition of the water atomization and gas atomization bronze powder, the twin follow - up treatment conditions, the heat effect and the finished product bulk density is different. Study its causes, water atomized powder particle shape irregular powder than aerosolization, and and so more supportive to speed up the scintillation percentage.
The embers process has great influence on the production of high - performance and low loose density bronze powders. It is ring in that in phlogiston process, the luminosity time and luminosity temperatures have a great influence on the flames effect of metal powder. In original, in the identical rapid oxidation time and phlogiston temperature, flare is particularly affected the warmth effect. Warmth proceeding is divided into static and go-getter in two ways. Static holocaust, the flames proportion of the bronze powder is very unruffled, and addicted to agglomeration; strenuous glow is not, so the inferno effect is very good. Relating as beneath in 5000C / 3h kind, static charring of the bronze powder energetic holocaust content is 7. 5 %. The bulk density is 3. 80g / cm3. Dynamic combustion content of bronze powder oxygen is 18. 7 % and bulk density is 2. 32g / cm3.
AOR arrangement of production of bronze powder, due to the microscopic shape of irregular, low oxygen content, good formability, process performance and stability, and it could replace the electrolytic copper powder. Lack a higher friction material used in packed - based products and green strength carbon copy products. Several well - known powder metallurgy and electric copy enterprises have use the powders in great - scale. It is plant that the effect is very nice.
The antioxidant effect of AOR bronze powder is better than that of electrolytic copper powder. Unbefitting the alike conditions, the antioxidant effect of the AOR procedure bronze powder is 2 times than electrolytic copper powders. This is particularly important to manufacturers of diamond tools. Seeing these enterprises use a small amount bronze powder every time, thereupon requiring a long shelf life of the powder. Source: http: / / www. mhcmp. com

Wollastonite Powder Processing Machine

Wollastonite Powder Processing Machine

Milling equipment of wollastonite is a widely used in the field of ceramics, chemicals, metallurgy, paper, plastics, paints and other silicates; hardness of 4. 5 to 5. 5, density of 2. 75 ~ 3. 10g / cm3, particularly suitable for superfine powder processing of milling machine. Distilled wollastonite application will be more widely used in different industries, you can do the following orderliness:

Paint grade wollastonite powder
Have a good reinforcement, that can embellish the toughness and durability of the dye, but also keep the whitewash surface passion and gloss. Besides that it also improves the resistance to washing and weathering properties, and can reduce the oil case of the coatings and inks to maintain the alkaline, with excoriation resistance. In addition, it can get high quality brightly colored whitewash, and the good of both coated and anti - aging properties. So that the gloss can get a better practical strength, increase durability, heighten adhesion and erosion resistance. There is good coverage and adhesion, too.
This bleeding heart of Emulsion grade wollastonite powder is suitable for MQYG series Ball Foundry.

Plastics and rubber grade wollastonite
Has a unique needle - undifferentiated fiber, with good insulation, heavy-footed resistance, and high refractive inventory. Plastics, rubber products, stuffing material. Features are: wollastonite powder can improve the impact strength, and amplify liquidity and improve the tensile strength, impact strength, linear stretch and mold shortcoming.

Friction level wollastonite powder
Is a proper needle - equivalent structure, while wollastonite unique evident and practical performance. Inimitably embroider the erosion resistance, heat resistance of the finished product. and it can improve the characteristics of the friction facility and stability
This tender-hearted of Plastics and rubber grade wollastonite is applicable to 4R Raymond Plant.

Paper grade wollastonite powder
Even after defined processing technology to maintain its unique needle - equal structure, so that new to the silicon gray powder clear paper, to improve its whiteness, haziness ( surface cloudiness ), flatness, difficulty, adaptability, reduce quantitative diversity between consistent and wet cardboard deformation, to improve printability, and a significant reduction in the use of a variety of other raw materials, reduce the overall cost of paper products.
This mild of Paper grade wollastonite powder is fit for 5R Raymond Works.

Building materials grade wollastonite powder
Is a non - toxic, odorless, radioactive and other advantages, and gradually replaced the asbestos that are harmful to human health, also is becoming new materials for environmentally friendly building materials in the new century. After special processing technology, it calm can maintain its unique needle - agnate structure, so that calcium silicate support, fire fodder which adds wollastonite needle - coextensive powder, much improve big impact resistance and flexural skill, abrasion resistance. Wollastonite will be more voluminous applications in the fields of building materials.
This mild of Building materials chain wollastonite powder can be ground by 6R Raymond Works.

Ceramic grade wollastonite powder
Adding the right amount of wollastonite powder, ceramic raw materials can much reduce the sintering temperature, diminish the firing time, to achieve low - temperature fast firing time, substantial savings in fuel, and significantly reduce product cost; while utilitarian the practical properties of the product, it also reduce cracks and warping, and increase the glazed sheen and improve the strength of the embryo, thereby increasing the degree of wicked products.
This good-hearted of Ceramic grade wollastonite powder can be zinged by Rotray Kiln.

Superfine powder technology advances, the performance of the wollastonite powder is powerfully developed. Wollastonite consumption most bright areas in the world is engineering plastics industry, wollastonite fillers and enlargement agents as plastics and rubber industry more and more to replace metal parts in manufactured goods, the market demand is growing rapidly.
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Polymer Materials Thermal Conductivity Additive: High Purity Submicron Aluminum Nitride Powder

Polymer Materials Thermal Conductivity Additive: High Purity Submicron Aluminum Nitride Powder

Aluminum nitride is an atomic fine correct to the case of diamond - analogous carved figure nitride. The maximum stability is about 2200 C. The room temperature is high and the intensity decreases slowly with temperatures increasing. It has good thermal conductivity coefficient and low thermal expansion. It becomes a good thermal shock material. With its strong ability of chafe resistance molten, aluminum nitride is an paragon crucible material for casting concentrated, aluminum or aluminum alloy.
Aluminum nitride is an electrical insulator with good dielectric properties. It is also merry for the electrical components. Due to the characteristics of aluminum nitride piezoelectric and silicon powder effect, the extensional stretching of the aluminum nitride pleasant for surface acoustic motion monitor. Aluminum nitride used in optoelectronic engineering, including optical storage interface and electronic matrix dielectric layer, high thermal conductivity make an chip carrier, as well as for military purposes. Ultra - fine aluminum nitride powder is mainly used to do the thermal conductive packing of polymer materials. It is very good for high thermal insulation cushioning in the electronic pulp and conductive dexterous. Application prospects are very broad. In LED heat dissipation and heat transfer.
Application of the aluminum nitride powder in the polymer material thermal conductivity is not promising. The main instigation is that when using it, the heat conduction heat transfer effect is far from the actual check data. The aluminum nitride powder is a highly material to consume moisture and oxygen, an exposure to moisture and oxygen, on the hydrolysis of oxidized and obscured its thermal conductivity thermal performance characteristics, this is the current constraints of the aluminum nitride powder problem. The ultra - fine aluminum nitride powder, without surface treatment and modification, it is difficult with the polymer nickel powder material mixed evenly, making it difficult to framework a good thermal conductivity channels, interpenetrating networks, it is difficult to solve the thermal conductivity of the polymer heat transfer.
For the problems of hydrolysis of aluminum nitride, oxide and difficult dispersion, we can use high vacuum DC arc plasma evaporation process. The evaporation of high purity aluminum targets nitride condensing, high purity violently - fine aluminum nitride powder, in the production process leading, add aluminum nitride - line materialize treatment process, the emerge resistance to hydrolysis groups grafted polymer coupling agent, macromolecular the dispersant coupling and come forth crosslinking reaction recipe of aluminum nitride powder arrive waterproof and anti - scintillation treatment, then the aluminum nitride powder is preprated. In the use of the process, the resistance to hydrolysis and phlogiston, vastly invaluable the thermal insulation properties of the aluminum nitride powder, aluminum nitride powder after modification of a good, well variegated with the polymer front-page to configuration a very dense thermal conductivity channel and interpenetrating network, to maximize the play of the thermal conductivity, thermal competency.
Applying directions of modified ultra - fine aluminum nitride powder are as follows: heat silica gel and thermal conductivity of epoxy resin, LED packaging materials; conductive mobile PA, PPS, the PE, the PC; high thermal conductivity of silicone rubber, fluorine rubber copper powder ( FCu ) applications and for the field of electronics and electrical industries. Other application areas are: fine aluminum nitride powder can be used for summery non - ferrous metals and semiconductor materials, gallium arsenide crucible, the evaporation craft, thermocouple protection channel, high temperature insulation, microwave dielectric materials, high temperature and chafe - resistant structural ceramics and transparent to microwave ceramics, as well as the application of polyimide resin, the LED heat dissipation, thermal insulation of mica disc, thermal effect, high thermal conductivity of the insulation varnished material, as well as conducting oil, high thermal conductivity slot insulation and high thermal conductivity of the impregnated resin.

R & D Of Chinese Titanium Powder Technology Gets Remarkable Achievements

R & D Of Chinese Titanium Powder Technology Gets Remarkable Achievements

With the rapid development of science and technology in recent years, more and more titanium and titanium alloy powder is widely used in various high - tech fields, industrial production and people ' s lives. The international demand is also growing. The market prospects are very broad. Especially the United States and Japan has constant extension in demand for titanium. Chinese titanium annual demand is about 2. 5 to 3 million tons and Chinese annual titanium production is only 1, 500 to 2, 000 tons. There is a huge gap in the market.
However, over titanium has the harder the more processing features, the typical specialist milling technology can not be scraped. Titanium smelting difficulties, low yields, high cost of international titanium products, especially the processing of titanium powder is still in the exploration, development stage, to master the core technology of titanium powder manufacturing countries do not.
Of the most common course of extraction from the ore of titanium, the Kroll process. However, due to the Kroll process to produce a long time, labor and energy are more worthwhile, many researchers have been searching for alternative processes., More representative of the Cambridge process uses electrolysis to stable production of titanium brush. Armstrong process through trim low - temperature reduction of titanium tetrachloride to produce titanium powder. The MER craft direct electrolytic reduction of the production of silicon powder. Hydrogenation dehydrogenation process using a modified Kroll process titanium scrap, scrap and other titanium waste to the production of titanium powder.
There are three kinds of titanium powder production process. One of them is for titanium rub. However, only Cambridge process technology of the production of titanium swab is R & D, funded by the producers of titanium clean. So, compared to the other three processes for the production of titanium powder, its industrialization process easier. Nevertheless, experts vocal the Cambridge technology has been commercialized for many years, but it is still subject to hanging technical barriers choke. At the identical time, the other three processes of industrialization is also far from the example one. Armstrong process has been used to produce a small amount of titanium powder. But until now it has not been used in huddle production, there is reposing some volume from the commercial production of pocket money powder ( FCu ). Some people suspect that the MER process has some abeyant, but is reposeful in cardinal development, its outlook remains unconfirmed. The prompt spot, the hydrogenation dehydrogenation process most hoping, and is seeking financing to progress its production, experts credit that this process a few years succeeding to the production of titanium plate for the U. S. Army. However, just to its low - cost advantages are mostly from the high utilization of titanium rumble, the process standstill can not fully replace the Kroll process.
Research and development of Chinese titanium powder processing technology seems pay more attention on market and industry belief. They achieved remarkable results. In 2000, the subject of the preparation and application of titanium nano - scale metal powder identified by the relevant departments and immense area applications. Nano - titanium powder preparation by a unique process that allows ordinary distemper, enhanced a new indolent - resistant, chafe resistance and other performance, this achievement in an international initiative, with the majority of nanotechnology research is still in laboratory stage, the results have been the first to achieve mass production, immense area applications. In addition, do the twin way, but also copper, strong, nickel powder and other metal powders, nano - materials. Industrial prospects of this outcome have been shown to be very broad. Synchronization through the identification of high - performance grinder, stand - alone each year can be purified 12 tons of nano metal powder, and performance improvements to improve significantly increase the cost much.