Recently, the Chinese Academy of Sciences of the Task Force and Gengfeng Xia Zhao Zhigang Nano Research Group Suzhou, Suzhou University to develop a new type of quantum dot tungsten oxide electrode electrochemical response of a material with ultra-fast performance. The results were published in a recent issue of the international journal "Advanced Materials."

Lithium-ion batteries, supercapacitors, fuel cells and other emerging energy conversion and storage devices, in addressing the shortage of conventional energy, renewable energy, energy source of instability and other issues has shown great potential widespread concern academia and industry. Fast and efficient electronic in the electrode material, ion transport process is one goal, but also improve the core technology issues related to device performance.

Compared with the conventional bulk materials, quantum dots sufficient contact (zero-dimensional material) small size, large specific surface area, a high percentage of surface atoms means that the material with the electrolyte solution and the ion diffusion distance is shorter, making it ideal for the electrode material. However, the findings of quantum dots used in the electrochemical mostly not ideal, which is a common quantum dots electrochemically active material difference between the surface and the organic ligand-coated particles are closely related to high interfacial resistance.

Zhao Zhigang and Gengfeng Xia Task Force Task Force conducted research on this issue, in terms of preparation and electrochemical applications of quantum dots tungsten oxide research breakthrough progress. They used a tungsten-based metal organic complexes as precursors for single fatty amine reactants and solvent, to obtain uniform size, can be a single nanocrystals dispersed in an organic solvent, and observed a strong quantum size effect, to solve the tungsten oxide quantum point is difficult to obtain, have to rely on the lattice problem template (silica gel, molecular sieves) to be produced.

The researchers further ligand exchange by simply make the quantum dots in the electrochromic discharge test, demonstrated significantly better than other non-zero dimension, and an inorganic oxide, tungsten oxide electrochromic material of the electrochemical properties. Is expected to greatly expand the quantum dot material coming fast response applications in the field of electrochemical devices.


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This week tungsten concentrate market price stability maintenance run, the market basically have no market price, the actual volume was light, although a slight inquiry, but mostly tentative. Holding cargo shipments will increase buyer continued down the inquiry, buyers and sellers is difficult to reach a consensus, the low turnover of difficulties, but subject to the continued downturn in demand and funding constraints, the current buyer is more dominant, the actual turnover of the market also slightly Yindie late or continue steady tungsten concentrate prices slipped slightly.

It is understood that this week understand ore purchase price compared to last week's cut 0.01 yuan / kWh, more than 60 degrees gross scheelite ore price was 1.33 yuan / kWh (excluding tax), Scheelite offer 60 degrees still hovering at 100,000 yuan / ton in the vicinity, but the actual inquiry pressed to 98,000 yuan / ton, turnover is rare.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Tungsten Products weak market stability maintenance. Tungsten steel offer is still concentrated in the 270 yuan / kg nearby, high-purity tungsten 285 yuan / kg, tungsten electrode grinding rod 405 yuan / kg. Because of lower orders scarce, manufacturers are unable to price adjustment, offer still maintain the original level, sentiment is very strong. Short-term market is expected to remain stable powder and products trend.

Tungsten powder and tungsten carbide temporarily stable prices low. At present, the mainstream is still concentrated in the actual transaction 248-250 yuan / kg, due to the current price is already low, the majority of businesses do not want to continue to cut prices, so the market temporarily steady operation. National small holiday approaching, the current stockpile downstream demand remains in the doldrums, the transaction did not improve, the business mentality pessimistic market outlook is expected to generally bearish.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Tungsten market: rare because demand continues to improve, tungsten iron market transactions scarce, downstream steel losses, export support is limited, but the number of transactions is still small, low market activity. Tungsten ore market sentiment strong, mostly tentative inquiry inquiry, the actual volume was light, despite the temporary price stability maintenance, but the turnover is slightly Yindie ore last week lowered the purchase price of 0.01 yuan relative / kWh, is expected to eleven former ore price or be a small drop points.

Rare because demand continues to improve, the market traded scarce, downstream steel losses, export support is limited, tungsten, iron smelter home until less than the operating rate, Hunan, a large, river tungsten and other large enterprises have continued to shut down, only a few small companies cut production run, the volume is also only 1-2 tons. It is understood that recently manufacturers to 172,000 yuan / ton to sell one ton 70 tungsten iron.

This week understand tungsten iron manufacturers offer a relatively slight decline last week, 70 ferrotungsten mainstream focus 17-17.4 yuan / ton, 80 tungsten iron has fallen below 180,000. Although downstream near eleven small manufacturers began to inquire, but still small number of transactions, market activity is low, the late 70 ferrotungsten cash price or below 170,000 yuan / ton.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Due to poor tungsten concentrate prices, scrap tungsten material recyclers interested in lower prices, the overall volume scarce. Waste tungsten grinding material price trend lower. At present, the content of the purchase price of 30-40 degrees W concentrated in 1.4-1.45 yuan / kWh, 50-70 degrees concentrated in 1.5-1.65 yuan / kWh, more than 70 degrees concentrated in the 1.65-1.7 yuan / kWh. Currently scrap tungsten drill mainstream price excluding tax concentrated in the 187-189 yuan / kg, domestic waste tungsten blade 167-169 yuan / kg, imported scrap tungsten blade 177-179 yuan / kg, scrap wire drawing dies mainstream price 180 yuan / kg. Hebei region offer slightly higher one yuan, most of the transaction on the market is still focused on low-cost resources. Short-term market is expected to die hard tungsten scrap weak pattern.

Overseas tungsten City climb up. 24 MB ferrotungsten evening Rotterdam offer $ 40-41 / kg tungsten, steady. Paratungstate European offer of $ 345-360 / t degrees, steady; Hong Kong offer $ 355-370 / t degrees, shifting $ 4 on low. Gradually release overseas demand, the market mentality began to improve, gradually warming the atmosphere transaction, expected short-term overseas market is expected to continue stable and inflation trend.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Tungsten market: raw materials markets running smoothly, closing market is very quiet, prices or continue slowly down the main; tungsten carbide powder and powder market demand is low, prices Budie, has fallen below 250 yuan / kg, and the regeneration of small powder spreads widened again leading renewable materials less competitive, less demand. Tungsten products market offer temporary stability. Because of lower orders scarce, the price adjustment will is not strong businesses, offer still remain stable, wait and see mood darker. Short-term market conditions are expected to continue to run smoothly tungsten.

Raw tungsten concentrate market continues to run smoothly, still less inquiry, inquiry lows, most mining capital is not very tight, there is currently no more than reluctant sellers, traders and weak demand due to financial constraints and other factors operating difficulties, the spot market turnover is very light.

Although, with eleven small holiday approaching, some downstream smelters home began to raw Inquiry for manufacturing operations to prepare for the holiday period, slightly increasing market inquiry, but the actual volume and price, and no significant breakthrough. And although the inquiry has increased, but the actual transaction still slightly Yindie, because there is more dominant buyer, who lack confidence in cargo business, turnover was approaching the interval.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
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Tungsten products market offer temporary stability. Because of lower orders scarce, the price adjustment will is not strong businesses, offer still remain stable, wait and see mood darker. Tungsten steel offer is still concentrated in the 270 yuan / kg nearby, high-purity tungsten 285 yuan / kg, tungsten electrode grinding rod 405 yuan / kg. Expected short-term powders and products market continued weak to run.

Tungsten carbide powder and weaker prices continue to run. At present, the actual transaction mainstream concentrated in 248-250 yuan / kg, compared with 1-2 million lower and lower a few days ago, low-cost resources continue to emerge, dragging prices down run, the business mentality partial pessimistic market outlook is expected for the poor.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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RE occupy more than half of the formation of the black market chain market order was severely damaged

Currently on the market circulation "black Rare Earth" has been more than half. RE normal market order has been seriously damaged, and the most recent price peaks before and after the June 2012 compared to last year, prices of many rare earth products fell nearly 70 percent.

Illegal rare earth hands down the flow through a number of companies and other large companies Minmetals Aluminum