Molybdenum Products & Prices: 九月 2022

2022年9月28日星期三

Molybdenum Foil Can Be Used as a Current Collector in Aluminum-ion Battery

Molybdenum foil is a thin sheet made of transition metal molybdenum material, which has the characteristics of high purity, low resistance, good electrochemical performance and chemical stability.

It is lightweight and flexible, can be used as a substrate for the fabrication of CdS-CdTe solar cells. Interaction of selenium, arsenic hydrides, stibine and bismuthine with Mo foil was investigated by atomic absorption spectroscopy. The metal foil may be used to generate metal diffusion bonding in silicon carbide/silicon carbide (SiC/SiC) joints. In addition, when used as a current collector in aluminum-ion batteries. the current collector problem faced by the battery can be solved to a certain extent.

The aluminum-ion battery is a rechargeable battery composed of a negatively charged aluminum anode, a positively charged graphite cathode, a separator and an electrolyte, and has a similar function to that of a lithium-ion battery. Due to its abundant and easy availability of aluminum resources, the use of non-flammable and electrochemically stable electrolytes, and the high theoretical specific capacity of aluminum metal anodes, it has attracted great attention from energy storage researchers.

However, the development of aluminum-ion batteries also faces many problems, such as the current collectors, the corrosion of aluminum anodes, and the high cost of electrolytes. Among them, the current collectors with good effect are mostly metal molybdenum foils and tantalum foils with inert characteristics and stable performance within the corresponding voltage range in the electrolyte system, but such metals are rare metals and relatively expensive.

Compared with cheap metal nickel foil and titanium foil, Mo foil has better electrochemical performance and chemical stability when applied in aluminum ion battery, so it can ensure the stable operation of the battery. Studies have shown that nickel foil will have chemical corrosion in the aluminum-ion battery system, and adverse side reactions will occur at low potentials, and the withstand voltage range is narrow.

It is worth mentioning that in addition to molybdenum foil, tantalum foil, nickel foil and titanium foil that can be used as current collectors for batteries, tungsten foil can also be used. Studies have shown that tungsten foil has stable electrochemical performance in the voltage window range of 0-2.5v.

Chinatungsten Online are professional manufactures and can provide both molybdenum and tungsten foils. Do feel free to contact us if you have got any purchasing plan.

If you have any inquiry of molybdenum foil, please feel free to contact us:
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What Are Applications of Molybdenum Foil?

Like molybdenum plate, molybdenum rod and molybdenum wire, molybdenum foil is also a typical molybdenum product with 0.025mm to 0.09mm thickness and 30-100mm width. Its purity is more than 99.95% and surface is very bright.

In terms of physical and chemical properties, this metal foil is a silver-gray metal flake with metallic luster, with a melting point of about 2620℃, a boiling point of about 5560℃, a relative density of 10.2g/cm3, high hardness and low thermal expansion coefficient, high thermal conductivity, small resistivity, good chemical stability and electrochemical properties. Under normal temperature and pressure, it will not react with air or water, but under heating conditions, it will be slowly oxidized.

Regarding production method, the preparation steps are as follows: firstly, using medium particle molybdenum powder as raw material, obtaining molybdenum compact by cold isostatic pressing, and then go through compound sintering, low temperature large deformation blanking, low temperature cross hot rolling, Alkali washing, grinding and shearing, then warm rolling, hydrogen annealing, surface cleaning and shearing, cross cold rolling, surface degreasing, and finally vacuum stress relief annealing and cutting inspection to obtain the desired products.

About the applications, Mo foil is widely used in the production of interconnect lines and composite grids of electronic devices, reflective screens and cover plates in sapphire crystal growth furnaces, heating belts and connectors in vacuum furnaces, and sputtering for plasma coating, targets, high temperature boats and other products.

The national standard of molybdenum foil: GB/T 3877-2006 replaced GB/T 3877-1983. The main changes in GB/T 3877-2006 are as follows: pure molybdenum grade Mo2 and rare earth element-added molybdenum alloy grade MoLa are added, and chemical composition requirements are supplemented; The thickness range of the foil is expanded, and the thickness is consistent with the stipulations of ASTM B386-03; the width range of the foil is expanded, and the allowable dimensional deviation is appropriately supplemented and adjusted; the supply status of annealing (m) is added; ASTM B386-03 is quoted The relevant indexes of ASTM B386-03 supplement the mechanical performance requirements of Mol grade products; the relevant indexes of ASTM B386-03 are cited to supplement the process performance requirements; the softening temperature of the annealed state is recommended.

If you have any inquiry of molybdenum foil, please feel free to contact us:

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2022年9月23日星期五

Molybdenum Sheet Price on September 23, 2022

The latest price of φ100x0.5mm molybdenum sheet is 6.50 USD/PC, EXW XIAMEN, CHINA on September 23, 2022.

When your next application requires an element with a high melting point, high temperature strength, low coefficient of expansion and low vapor pressure at elevated temperatures, molybdenum is the material of choice. Molybdenum sheets can be used to manufacture electric light source parts, electric vacuum components and power semiconductors, as well as molybdenum boats, heat shields, and heating elements of high temperature furnaces.

Chinatungsten Online is the world's leading supplier of high-quality molybdenum sheet products, and can provide cold-rolled sheet products of various thicknesses and lengths according to customer requirements. Like all of our materials, our sheets start with metal powder, which is then pressed into ingots, sintered, and then rolled. This process allows us to customize products to meet specific material and performance requirements to ensure optimum performance in your application.

If you have any inquiry of molybdenum sheet, please feel free to contact us:

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Molybdenum Crucible Price on September 23, 2022

The latest price of Φ410xΦ380x220mm molybdenum crucible is USD6,300.00/PC, EXW XIAMEN, CHINA on September 23, 2022.

Corrosion resistance, creep resistance and high temperature performance make molybdenum made crucibles very suitable for high temperature crystal growth processes. When sapphire is easy to extract, higher sapphire yield and quality can be achieved. The molybdenum-based crucible has heat resistance and a smooth surface, making it durable and cost-effective.

The surface roughness of the molybdenum crucible needs to be higher than 1.6 µm. When the surface of the crucible is rough, the sapphire is not easy to take out and it is easy to damage the crystal. In addition, the crucible will be damaged in the process. Chinatungsten Online's ultra-smooth crucible eliminates these problems. Sapphire manufacturers can benefit from this product because it eliminates complex and expensive processes. In addition, the smooth surface is resistant to corrosion caused by aggressively molten sapphire. This function can extend the service life of reusable crucibles.

Moly crucibles for sapphire growth furnaces are available with a variety of dimensions including round, in numerous standard diameters and wall thicknesses. Custom configurations are available. In addition, many other components for these furnaces are also customized.

If you have any inquiry of molybdenum crucible, please feel free to contact us:

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2022年9月8日星期四

What Is the Function of Molybdenum Seed Holder in Sapphire Crystal Growth?

What Is Molybdenum Seed Holder?

Molybdenum seed holder, also named molybdenum chuck, is widely used in vacuum furnaces and sapphire crystal growth furnaces to connect the seed rod for crystal growth. The seed rod inserted into the moly chuck, and fixed by a molybdenum pin or taper.

The purity of this holder is above 3N5, the density can reach 10.0g/cm3, and the working temperature is controlled below 1700℃. Regularly, the diameter ranges from 10mm to 100mm and length ranges from 100mm to 1000mm. In addition, the holder can be reused as it is made of molybdenum metal that is very durable.

What Is the Function of Moly Seed Holder in the Sapphire Crystal Growth?

The sapphire crystal material is a 60,000-lattice crystal formed by high-purity alumina (Al2O3) with a purity greater than 99.999% in a crystal growth furnace by melting and crystallization at high temperature. It has high sound speed, high temperature resistance, corrosion resistance and high hardness, high light transmittance, high melting point (2050℃) and other properties, so it is often used as optical components, infrared devices, high-intensity radium radiation materials and mask materials.

Sapphire crystal is grown in the sapphire crystal growth furnace and moly seed holder is used to hold seed. To get high quality crystals, in the first place, the furnace body has good sealing performance so that the internal temperature gradient is consistent, thereby improving the quality and yield of the crystals produced, and also improving the production efficiency, and is suitable for mass production of crystals.

In the second place, in the process of sapphire crystal growth, high-quality single crystal ingots are extracted by controlling heating power, pulling speed and rotation speed. The seed chuck is a device that connects the seed and plays a very important role in the growth of single crystals.

If you have any inquiry of molybdenum seed holder, please feel free to contact us:

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Why Molybdenum Hammer Is Important in the Monocrystalline Silicon Growth?

What Is Molybdenum Hammer?

The hammer is usually made of tungsten and molybdenum materials as it is used in high temperature furnaces that require the materials to be heat resisting.

It is mainly used to connect molybdenum seed holder and tungsten wire rope, and is hung on the suspension clamp or jumper the bottom, increasing the clamp vertical load heavy objects. Although the product can be made from both tungsten and molybdenum metals, as tungsten price is higher than molybdenum, molybdenum is usually the raw material of seed holder with advantages of cheaper price but the same function. Its concentricity requires to be the same as seed holder and tolerance is very strict. The shape corners of threaded need be smooth, high finish.

Monocrystalline silicon is a crystal with a basically complete lattice structure. It is a good semiconductor material with a purity of more than 99.9999%. It can be used for the production and deep processing of diode-level, rectifier device-level, circuit-level and chip products.

Semiconductor grade single crystal furnace is an important crystal growth equipment in the single crystal silicon industry chain. At present, the Czochralski has the advantages of large single crystal quality, large diameter, low cost and high production efficiency, and has always been the main method for the preparation of semiconductor silicon substrates.

The Czochralski is to melt a cooled seed crystal in contact with a silicon melt. When the temperature of the interface is lower than the freezing point, the seed crystal starts to grow. In order to make the seed crystal grow continuously, it is necessary to gradually reduce the temperature of the melt and rotate the seed chuck device to improve the temperature distribution of the melt. When the crystal grows to a certain stage, the seed chuck device must be lifted slowly to expand the heat dissipation surface. Therefore, the reliability and stability of the seed chuck device are very important, and the molybdenum hammer is the key to ensure the reliability and stability.

If you have any inquiry of molybdenum hammer, please feel free to contact us:

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