When the car is working, result in that the main reasons of tungsten contacts gap misalignment of distributor are shown as below:

1. Tungsten contacts ablation, it will cause the increase of tungsten contacts gap after the surface oxide shedding.
2. The top block of movable arm of contact wears, so the gap of tungsten contacts becomes smaller.
3. The distributor between the shaft and bushing will wear on each other, not only result in the distributor shaft swing phenomenon occurs, but will make the tungsten contact gap volatile, suddenly become small or big.

4. Driver’s improper adjustment. Under normal circumstances, the driver would use visual methods and their experience to adjust the gap of tungsten contacts, rather than through plug inspections and adjustments. This can cause the size misalignment of the tungsten contact gap.

Therefore, in order to improve the engine's power to reduce the consumption amount of fuel and maintain the normal operation of the engine, you should correctly adjust the gap of tungsten contact of distributor.



 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 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

Adopting infiltrating way to prepare silver tungsten contacts, you should calculate accurately to ensure the content of silver is qualified and do not waste silver. The expression between the actual density of tungsten skeleton and content of infiltrating silver’s is as follows:

       R1 = Q * R2 / V * R3 * S

Among them,
Q refers to: Requirements of infiltrating silver (g)
V refers to: Skeleton volume (cm³)
S refers to: correction value, in the range of 0.8-0.9
R1 refers to: the actual density of tungsten skeleton (g / cm³)
R2 refers to: theoretical density of tungsten skeleton (g / cm³)
R3 refers to: theoretical density of silver (g / cm³)



 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 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

Tungsten disulfide also known as tungsten sulfide, is a gray hexagonal layered structure, easy dissociation, has lubricating properties similar to graphite, commonly used in lubricants such as aerosols. Its physical properties are as follows: chemical formula: S2W, molecular weight: 247.97, density: 7.6g • cm-3, slightly soluble in water, soluble in water, insoluble in hydrochloric acid and alkali, but dissolved in molten alkali. Tungsten disulfide has reducing properties which can react with hot concentrated sulfuric acid, nitric acid, aqua regia and other strong oxidizing agent. Heating in the air or oxygen may be converted into tungsten trioxide.
Tungsten disulfide packing generally has two tape 25 kg and 50 kg with double plastic bags and metal bucket.
Tungsten disulfide with a certain irritation, if accidentally touching will irritate the eyes, respiratory system and skin. So during the operation should wear protective gloves, glasses or masks.
There are some registry numbers of tungsten disulfide which is CAS registry number. 12138-09-9, EINECS number 235-243-3, MDL No. MFCD: 00011467, PubChem number 24854626.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.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
 

Silver-tin oxide is an electrical contact material which is silver-based containing tin oxide, Ag-8.7SNO2 and Ag-12SnO2 properties is good than Ag-CdO such as corrosion resistance, arc resistance and thermal stability. It can produce by oxidation or by sintering. Besides, silver-tin oxide has consistent performance and long life is mainly used in medium-load electrical contact materials, such as various contactors and protection switch.
Silver-SnO2-WO3 is a material which adding tin oxide and tungsten oxide in silver-based. Because tungsten oxide (or molybdenum oxide) can improve the wettability of tin oxide, reducing the electrical connection overheating, thus significantly improving the service life. By the way it can obtain by sintering. Silver-SnO2-WO3 is mainly used in all kinds of contactors, motor starters, circuit breakers and other low-power appliances. Ag-11.5SNO2-0.5WO3 and Ag-11.2SnO2-0.8MoO3 can replace the Ag-CdO in many areas.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.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
 

Tungsten and chlorine react in the air or react with oxygen can generate tungsten oxytetrachloride (WOCl4) and tungsten chloride (WO2Cl), which tungsten oxytetrachloride is a red orange needle-like crystals, tetragonal crystal structure.
The physical properties of tungsten oxytetrachloride are as follows: the chemical  formula: WOCl4, melting point: 209 ℃, boiling point: 232 ℃, and has good hygroscopicty, it can generate tungstic acid by hydrolysis. Besides, it can be dissolved in an organic solvent such as carbon disulfide, benzene and others and easy and easily react with alcohol, phenol and acid group to form the corresponding compounds. What’s more tungsten oxytetrachloride easy react with   ammonium, amine, ether and acetonitrile to form complexes.
Producing method of tungsten oxytetrachloride has three which are as following: The first is through the tungsten trioxide and sulfur oxychloride reaction to from it; the second is reacting between tungsten trioxide and carbon tetrachloride to from; third is reaction in tungsten trioxide and tungsten hexachloride which will generate tungsten oxytetrachloride.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.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
 

Eu3+-doped calcium tungstate powders were prepared by a precipitation method and their properties were characterized by X-ray diffraction(XRD),fourier transform infrared spectroscopy(FT-IR),field emission scanning electron microscopy(SEM),and fluorescence spectrometer(PL).The products are spherical in shape and disperse well.The Eu³⁺ in co-precipitation material has good luminescence properties and the best performance is obtained with the Eu³⁺ mole content of 5%.

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.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

People all must be aware of radiotherapies which are used to destroy cancer cells or tumour by directly putting radiation beams on it. Surgeons must take a lot of care when treating patients with this radiotherapy because the surrounding tissues of the tumour must not face this radiation or those tissues will get badly damage. Multi-leaf tungsten alloy collimator is used to keep the focus of beams on the right place and reduce the extra damage to the health tissues. This material consists of two very thin but heavy tungsten alloy plates which are configured in such a way that it works on exactly the tumour area by measuring the accurate shape and size.

These tungsten alloy collimators are made up of groundbreaking components of tungsten alloy X-ray targets. According to the recent medical research, tungsten alloy collimators, with high shielding capability and high density, are more successful in different radiation therapies as compared to X-rays and gamma rays.

  Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online- http://www.tungsten-alloy.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
 

Tungsten can react with many halogens such as fluorine, chlorine, bromine and iodine.
Iodine is one of the halogen elements, is a shiny purple flake crystals, toxic and corrosive, and easy sublimation, after sublimation easily to desublimation. Due to its high vapor pressure, so under the low-grade fever it wills sublimation. Beside it is soluble in many organic solvents such as chloroform, carbon tetrachloride. Iodine is mainly used for making drugs, dyes, iodine, text paper and iodine compounds.
Tungsten diiodide is kind of brown powder and its CAS registry number is 13470-17-2. Its physical properties are as follows: chemical formula: WI2, molecular weight: 437.7, the relative density of 6.8025, insoluble in cool water, ethanol and CS2, but soluble in alkali, and can be decomposed in hot water. It will change into tungsten trioxide when heated in air and precipitation I2.
Currently there has two common ways for producing tungsten diiodide: The first one is making tungsten react with iodine at 950 ℃ to generate (W6I8) I4 that is tungsten diiodide ; the second one is at CO2 atmosphere with red heat to make tungsten react with iodine vapor to obtain tungsten diiodide.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.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

Tungsten tetraiodide is a black powder (no fixed melting point and boiling point), and it CAS system number is 14055-84-6.
Its physical properties are as follows: chemical formula: WI4, molecular weight: 691.458, relative density: 5.218, which decompose at the melting temperature, insoluble in water but can decompose in hot water, soluble in ether, chloroform and turpentine.
Its chemical properties are as follows: tungsten tetraiodide heat in the air will decompose into tungsten diiodide and iodine, and easy to hydrolysis and oxidation. Besides it easily restore by pyridine, acetonitrile and other nitrogen-containing ligand compounds in air to form the corresponding complexes.
Currently, there are two common ways for synthesis tungsten tetraiodide which as following: the first one can restore tungsten hexachloride by hydrogen iodide; the second is reacting bweet triiodide aluminum and tungsten dioxide.

Tungsten Manufacturer & Supplier: Chinatungsten Online -http://www.tungsten-powder.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
 

Tungsten shielding is used as a main manufacturing component in CT machines. It is mainly used in making detector arrays of scanners whereas its collimators are used in making circular radiation components. However, some manufacturers also use lead in making these products.

Tungsten alloy collimator is the device mainly used for making the beam of particles and waves narrow. Along with this property, it is also used as linear accelerator or cyclotron in various medical treatments. This collimator consists of simple structure with easy working phenomena e.g. fibre radiate light is converted into parallel light (Gaussian beam). The summary of its all features is that it efficiently maximises the light which is coupling into the device.

  Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online- http://www.tungsten-alloy.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