The production of x-rays requires a rapidly moving stream of electrons that are suddenly decelerated or stopped. The source of electrons is the cathode, or negative electrode. Electrons are stopped or decelerated by the anode, or positive electrode. Electrons move between the cathode and the anode because there is a potential difference in charge between the electrodes. The components of the X-ray tube include a glass envelope containing a high vacuum. A cathode or negative electrode which contains a tungsten filament, which when heated emits electrons in a process called 'thermionic emission.
Tungsten alloy is required as it has a high atomic number to improve the efficiency of bremsstrahlung x-ray production, and a high melting point.
 

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X-rays come out because of atomic processes induced by the energetic electrons shot at the target. They are just like any other kind of electromagnetic radiation. They can be produced in parcels of energy called photons, just like light. There are two different atomic processes that can produce x-ray photons. One is called Bremsstrahlung, which is a fancy German name meaning "braking radiation." The other is called K-shell emission. They can both occur in heavy atoms like tungsten.

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Since late August, some overseas companies has not ended the summer break, return to the market, compared with the spring, summer decline in end-user buying. Tungsten carbide scrap prices are at a low position, the mainstream in $ 15 / nearby pounds. It is understood that customers $ 15.25 / lb contraband sent to a small number of successful trading price of the goods, and more trading volume, the price will be relatively slight decline.

Although tungsten carbide scrap market in the doldrums, but the market supply of goods in short supply, businesses find difficult to go along with the requirements of larger coefficient of tungsten carbide scrap and scrap tungsten carbide 99.7% min as effective substitutes, with the end of the summer break, & ldquo; gold, nine silver ten & rdquo; late arrival is expected to fall.

This week tungsten market continues to slump, cash-strapped businesses in tungsten, supply and demand have to wait and see, less market operations, thinly traded. Tungsten ore market sentiment strong, due to favorable factors has yet to see signs of market confidence weakened further downstream APT continued pressure of raw materials such as tungsten concentrate smelter home inquiry, currently 60 degrees Scheelite has now 100,000 yuan / ton low quote.

Guided announcement is expected before September, tungsten City or stabilization operation, turnover is difficult to break; September tungsten concentrate prices have soared hardly possible, the main factors are: First, the normal exploitation of mines, supply of raw materials continues to grow; Second downstream demand continues to slump, long-term supply and demand balance is difficult, oversupply; three tungsten businesses generally funds are tight, businesses or operations cautious, or cheap Paohuo, which is not conducive ore prices upward.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
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Ferrotungsten difficult market transactions, large smelter family pressure, on the one hand from the State Environmental Protection in depth, on the other hand the downstream demand continues to slump. The current rate is still low smelter home starts continue to maintain production of the manufacturers also only keep a small amount of production. It is understood that Dan Cheng Xin production run, the current daily production capacity is only 5 tons.

Ferrotungsten manufacturers more in environmental protection and rectification, minimize the cost of procurement of raw materials become more cautious. Currently manufacturers mostly old customer oriented, thinly traded, and the transaction price is slightly Yindie overall decline in the 500-1000 yuan / ton in mid-August were sold last week, only slightly. It is understood that 70 ferrotungsten cash price hovering at 17.2-17.3 yuan / ton nearby.

Overseas tungsten City is still a steady decline. On the 27th evening MB Rotterdam ferrotungsten offer 39.7-40.7 U.S. dollars / kg tungsten, steady; paratungstate European offer of $ 350-360 / t degrees, the overall decline $ 10; Hong Kong offer remains at $ 358-370 / t degrees. Although the European summer break has ended, but still have not seen the release of overseas downstream demand, market trading atmosphere is still deserted, often causing prices dropping, expected short-term overseas market will remain difficult tungsten city better.

Tungsten steel scrap prices firm holding stability. Currently scrap tungsten drill mainstream price excluding tax concentrated in the 189-190 yuan / kg, domestic waste tungsten blade 168.5-170 yuan / kg, imported waste and scrap tungsten blade drawing die is still concentrated in the 178-180 yuan / kg. Recent tungsten steel scrap trading volume has decreased, but the business mentality still strong, the price adjustment will is not strong, short-term and more will continue to stabilize. Grinding material purchase price 30-40 degrees W content focused on the 1.45-1.5 yuan / kWh, 50-70 degrees concentrated in the 1.55-1.65 yuan / kWh, more than 70 degrees concentrated in the 1.65-1.71 yuan / kWh. A time when the end, tungsten concentrate prices stabilized, scrap tungsten materials business mentality slightly by the support. Currently waiting to see the introduction of multi-month miners guided tungsten concentrate agency is expected no short-term market fluctuations.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
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Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn