95%W Ø2.4mm Tungsten Alloy Ball Price-NOV. 25, 2016
- Details
- Category: Tungsten Military Parts Price
- Published on Friday, 25 November 2016 15:23
- Hits: 1908
95%W Ø2.4mm tungsten alloy ball price is 57.00 USD/kg, EXW XIAMEN, CHINA, NOV. 25, 2016.
| Tungsten Alloy Supplier: Chinatungsten Online www.tungsten-alloy.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News & Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
93%W Ø114mmx18mm Tungsten Alloy Rod Price-NOV. 25, 2016
- Details
- Category: Tungsten Alloy Price
- Published on Friday, 25 November 2016 15:16
- Hits: 1903
93%W Ø114mmx18mm tungsten alloy rod price is 230.00 USD/pc, EXW XIAMEN, CHINA, NOV. 25, 2016.
| Tungsten Alloy Supplier: Chinatungsten Online www.tungsten-alloy.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News & Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
90%W Ø90mmx20mm Tungsten Alloy Rod Price-NOV. 25, 2016
- Details
- Category: Tungsten Alloy Price
- Published on Friday, 25 November 2016 15:15
- Hits: 1974
90%W Ø90mmx20mm tungsten alloy rod price is 290.00 USD/pc, EXW XIAMEN, CHINA, NOV. 25, 2016.
| Tungsten Alloy Supplier: Chinatungsten Online www.tungsten-alloy.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News & Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
2016.11.25-Tungsten Copper Part Price
- Details
- Category: Tungsten Copper Price
- Published on Friday, 25 November 2016 14:57
- Hits: 1484
As reported by Chinatungsten Online, the current price of 80%W20%Cu tungsten copper part of Ø125mmxØ100mmxØ60mmx40mmx10mm is $165.00 per piece EXW Xiamen, China on NOV.25, 2016.
| Tungsten Copper Supplier: Chinatungsten Online tungsten-copper.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News & Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
2016.11.25- Tungsten Carbide Polished Button Price
- Details
- Category: Tungsten Carbide Price
- Published on Friday, 25 November 2016 14:53
- Hits: 1702
As reported by Chinatungsten Online, the current price of YG8C tungsten carbide polished button for Ø9.05mmx13mm is $0.58 per piece EXW Xiamen, China on NOV.25, 2016.
| Tungsten Carbide Supplier: Chinatungsten Online tungsten-carbide.com.cn | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News&Tungsten Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
Ammonium Metatungstate Price on Nov.25th, 2016
- Details
- Category: Ammonium Metatungstate
- Published on Friday, 25 November 2016 09:50
- Hits: 2104
Ammonium metatungstate price with purity over 91.40% from Chinatungsten Online is 35.50 USD/KG, by Chinatungsten FOB Xiamen, Nov.25th, 2016.
| AMT Supplier: Chinatungsten Online ammonium-metatungstate.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News&Tungsten Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
Ammonium Metatungstate Preparing Violet Tungsten Oxide Whisker
- Details
- Category: Ammonium Metatungstate
- Published on Thursday, 24 November 2016 15:27
- Hits: 2192
Ammonium metatungstate (AMT) is an important compound in tungsten metallurgy industry, an important raw material for preparing tungsten oxide, such as tungsten trioxide (YTO, WO3), violet tungsten oxide (VTO, WO2.72 or W18O49). Violet tungsten oxide whisker is the micro-nano-short fibers which are generated by the high purity violet tungsten oxide, with the mechanical strength equal to the strength of adjacent atoms between the intensity. The highly oriented structure of W18O49 whisker has not only making itself of high strength, modulus and elongation, but also of the properties of electrical, optical, magnetism, dielectricity, conductivity and superconductivity.
It is pointed out that a process for producing violet tungsten oxide whiskers by coaxial electrostatic spinning method with ammonium metatungstate as a raw material is as follows:
1. Mix 2ml saturated ammonium metatungstate solution and 12% PVA solution in a certain proportion, to prepare spinning solution;
2. Inject the best electrospinning solution into 10ml syringe, and install it in the syringe pump to carry out a single tube electrospinning experiment. In the spinning process, solvent will volatilize partly in the air and form ammonium metatungstate/PVA composite fiber;
3. Calcine the obtained ammonium metatungstate / PVA composite fiber in the air to remove the solvent and the matrix PVA, and the ammonium metatungstate is decomposed by heating to obtain WO3 one-dimensional nanofibers at the same time;
4. The WO3 one-dimensional nanofibers is transformed to some specific crystal type and appearance by a certain heat treatment process, thereby to get W18O49 whisker.
The results showed that 800 ℃ is the optimum temperature for the formation of violet tungsten oxide whisker, and the W18O49 whisker nanorods are different in length. In addition, from the transmission electron microscopy (TEM), SEM, XRD and SAED patterns, we can observe that W18O49 whiskers are growing independently of each other with the smooth surface, with nano-level diameter and micron-length, large aspect ratio, and the is diameter mainly among 170nm-250nm, the length is mainly between 2-3μm, long diameter ratio mainly among 10-17, thus to be with some unique properties.
| AMT Supplier: Chinatungsten Online ammonium-metatungstate.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News&Tungsten Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
Ammonium Metatungstate Preparation -- Nitric Acid Neutralization Method
- Details
- Category: Ammonium Metatungstate
- Published on Tuesday, 22 November 2016 16:15
- Hits: 2163
Ammonium metatungstate (AMT) is an important intermediate compound during the tungsten wet smelting process, white or yellowish crystals, which has the highest solubility in all tungsten compounds (303g/100mL under 20°C in water). There are many preparation methods of ammonium metatungstate, such as thermal decomposition, tungsten acid, electrodialysis, solvent extraction, ion exchange method, while the thermal decomposition method based on the raw material of APT is the main process for manufacturing AMT in industrial currently.
Being one class of preparation method, acid neutralization method has been focused and widely used in the industry because of its simple process and equipment. Some studies have followed on the nitric acid neutralization method, taken ammonium paratungstate (APT) as raw material to convert and generate AMT in an environment of nitric acid, which is heating a certain amount of deionized water, and slowly adding APT and dilute nitric acid solution with the ratio of 1:20 with stirring, then controlling the transformation temperature within limits to convert APT to AMT in the liquid phase and generate AMT solution, and finally get ammonium metatungstate crystal after the steps of ageing, preconcentration, concentration, crystallization, solid-liquid separation and drying. Wherein, the reaction equations of APT converts to AMT by nitric acid neutralization method is like:
(NH4)10W12O41.xH20+4HNO3= (NH4)6H2W12O40.yH20+4NH4NO3+H2O
The nitric acid in this method can be replaced by organic acids, such as formic acid, acetic acid, citric acid, lactic acid, with the advantages of moderate acidity and easy to operate; but, the expansive price of organic acids makes them hardly to be used in the mass production of AMT in industrial. However, although the nitric acid being used in the nitric acid neutralization method has the benefits of easy to get and low cost; but, because nitric acid has a strong acidity which will make the generation of tungstic acid colloid becoming easily, and introduces impurity of nitrate into AMT, thereby to decrease the converting rate and property of AMT.
| AMT Supplier: Chinatungsten Online ammonium-metatungstate.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News&Tungsten Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
2016.11.22-Tungsten Carbide Tiles Price
- Details
- Category: Tungsten Carbide Price
- Published on Tuesday, 22 November 2016 10:32
- Hits: 1684
As reported by Chinatungsten Online, the current price of YG11C tungsten carbide tiles for 40mmx15mmx4mm is $1.65 per piece EXW Xiamen, China on NOV.22, 2016.
| Tungsten Carbide Supplier: Chinatungsten Online tungsten-carbide.com.cn | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News&Tungsten Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
2016.11.22-Tungsten Copper Rod Price
- Details
- Category: Tungsten Copper Price
- Published on Tuesday, 22 November 2016 10:22
- Hits: 1234
As reported by Chinatungsten Online, the current price of 80%W20%Cu tungsten copper rod of Ø16mmx200mm is $33.20 per piece EXW Xiamen, China on NOV.22, 2016.
| Tungsten Copper Supplier: Chinatungsten Online tungsten-copper.com | Tel.: 86 592 5129696; Fax: 86 592 5129797;Email:sales@chinatungsten.com |
| Tungsten News & Prices, 3G Version: http://3g.chinatungsten.com | Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn |
sales@chinatungsten.com
闽公网安备 35020602000140号