Molybdenum Disulfide Enables Good Lubrication for Carbon Motor Brushes

The brush is a kind of conductive component that plays an important role in sending electrical current between motionless and rotating parts by sliding contact. Due to its good electrical, thermal and lubricating properties as well as a certain mechanical strength and the instinct to inhibit commutation sparks, all most all DC motors and commutation motors use brushes. Typical applications include electric motors, alternators and electric generators.

Since the performance of the brush has significant impact of the performance of rotating machine, the choice of brush is a critical factor. Usually, carbon motor brushes have special requirements for resistivity and contact resistance, and requires good sliding contact characteristics such as friction coefficient, wear resistance. 

Molybdenum disulfide (MoS2) is the most famous of the single layer transition metal dichalcogenide (TMD) family. It has been used in bulk for many years as a solid state lubricant, this is due to its low coefficient of friction in addition to its high chemical and thermal stability. MoS2 can maintain a very good lubrication effect in mechanical parts that operate in vacuum. 

When the brush contains a certain amount of molybdenum disulfide. Although it is difficult to form a cuprous oxide film at high altitude, it can form a sulfide film with good lubricating effect. This film is tightly adsorbed on the surface of the slip ring, so that the brush still has good lubricating performance at high altitude. In addition, molybdenum disulfide has good water resistance and pressure resistance.

Molybdenum disulfide is also an ideal solid lubricating material in the aerospace field. It has a very low friction coefficient and a high yield strength. Therefore, combining the characteristics of the two, the development of a silver-based brush composite material with high conductivity, low friction factor and good mechanical properties is an urgent need for electrical contact components in the aerospace industry.

Chinatungsten online produces professional molybdenum disulfide that is suitable for the electric brush industry, strictly controlling the particle size, water, acid value and other indicators. Our MoS2 can be for a variety of customer needs and purposes. 

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

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Molybdenum Alloy Plugs to Pierce Stainless Steel Pipes

There are two kinds of steel pipes – stainless steel pipes and welded steel pipes, according to their production methods. Compared with welded steel pipes and other steels, stainless steel pipes are pierced with tools such as plugs and mandrels.

These piercing tools not only participate deformation, but also are the most important factors that determine whether the main processers of steel pipe production, such as piercing and pipe rolling can operate normally. As a matter of fact, the production process of seamless steel pipe also reflects the technical level of these tools. In other words, the research on internal deformation tools is an important subject of seamless steel pipe technology research.

Molybdenum alloy plugs are used to pierce seamless tubes of different materials, such as stainless steel, brazing steel, high-temperature alloy steel and other special parts. As they work in high temperature and harsh environments, the material of plug requires the characteristics of high temperature strength, high temperature oxidation resistance, long service life, corrosion resistance and not easy to stain glass.

Therefore, the material of the plug usually adopts molybdenum alloy with a composition of Ti, Zr, C and Mo. Molybdenum alloy plug is produced in a powder metallurgy process, has a higher recrystallisation temperature and higher strength compared to pure molybdenum, and is readily deformable even at room temperature. These effects are due to mixed crystal formation between Mo and Ti as well as the precipitation of ZrC as a dispersoid.

Actually, the materials to be used depends on what kinds of steel pipes to be pierced. Different materials of pipes have different characteristics and thus require plugs to meet different working conditions. As a professional manufacturer of molybdenum and tungsten, Chinatungsten Online can offer you various kinds of piercing plug. Certainly, customized designs are welcomed. Send us drawings and inform us its detailed application, we will offer you the best solution. 

If you have any inquiry of TZM plugs, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Amazing! 500 Bottle Caps Produced in One Minute with Hot Runner System

 500 plastic cups or 500 bottle caps are produced in one minute. Oh my god, it’s so amazing! Indeed, it is probably a fantasy to achieve such high efficiency with traditional production lines. But hot runner system has achieved and is constantly improved at present. 

Almost every industry, including construction, electronics, aviation, automotive, medical, food and beverage, more realizes the potential for gaining a competitive advantage. Injection molding is not only an efficient method of manufacturing precise plastic parts and components, but also reduces production time, has high precision and reduces material waste. It can produce plastic parts that are as strong as steel, or can be very soft and flexible.

When using the plastic injection molding process, the manufacture of any part starts with the mold. The molding system is divided into two categories: hot runner molds and cold runner molds. The hot runner uses a screw nozzle, which is fed by a pump through the barrel, while the cold runner uses a closed thermosetting mold. The main task of any runner system is to guide the plastic melt from the runner to the mold cavity. 

The system requires additional pressure to push the material through the flow channel. The frictional heat generated by the material in the runner mold flows through the runner and increases the temperature, thereby facilitating the flow. One of the best rewards of any project is to reasonably determine the size of the runner for a given component and mold design.

The nozzle is the key component of the hot runner mold. In the hot runner system, in order to maintain the molten state of the plastic in the nozzle, heat insulation must be as perfect as possible, and some nozzles need to be heated internally or externally, while the cavity needs to be cooled. The temperature difference between the two is usually 100~200℃. Therefore, the material and design of nuzzle should meet the thermal balance requirements in priority, which are necessary to avoid too much cold material in the nozzle to solidify and block, but also to avoid overheating of the plastic, casting or drawing, or even decomposition.

The best material for machining nuzzles is titanium-zirconium-molybdenum alloy (TZM alloy). TZM nuzzle can maximize the utilization of materials and meet the requirements of plastic melt insulation and heating. In addition, molybdenum alloy nuzzle also has a very long service life, which can greatly reduce production costs. 

Chinatungsten Online is a very professional manufacturer of tungsten and molybdenum, with rich experience in the production of titanium-zirconium-molybdenum alloy rods. If you have any purchasing plan, please feel free to contact us.

If you have any inquiry of TZM rod, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Molybdenum Disulfide Is One of the Ideal Materials for Transistors and Chips

Molybdenum disulfide (MoS2) is considered to be the most promising alternative to silicon due to its unique single-layer atomic structure and excellent photoelectric properties, and becomes one of the ideal materials for future applications in high-precision technology fields such as semiconductors, transistors, and chips. Therefore, in recent years, scientists have maintained a strong interest in the exploration and research of molybdenum disulfide.

Recently, the EPFL research team used molybdenum disulfide to develop a new type of "brain-like neuron transmission" computer chip, which has the ability to process and store information in the same circuit, and realize small size for computer equipment. It provides new ideas for optimization, high efficiency and energy saving.

Molybdenum disulfide is a transition metal chalcogenide two-dimensional material (TMDC). It has a graphene-like layered structure and has the characteristics of a direct band gap semiconductor that graphene does not have. Molybdenum disulfide is composed of three atomic plane layers (S-Mo-S) stacked. It has a large specific surface area, high electron migration rate, anti-magnetic resistance to radiation, low energy consumption, environmental protection, energy saving and efficiency, and high stability. And can achieve large-scale production, is an ideal material for optical and electronic equipment.

For the first time, EPFL researchers have successfully applied the two-dimensional material molybdenum disulfide to a chip that integrates data storage and logic operations. This will subvert the traditional computer model of processing data by the central processing unit (CPU) and then transmitting it to the hard disk for storage. 

According to reports, the new chips are based on floating gate field effect transistors (FGFETs) and are usually used in flash memory systems for cameras, mobile phones or computer equipment. These transistors can hold charge for a long time, and molybdenum disulfide with a thickness of only three atomic layers can not only further reduce the volume of electronic devices, but also has a strong sensitivity to the charge stored in the transistor, so logic operations can be implemented as well as data storage function.

Chinatungsten Online's molybdenum disulfide not only has great application potential in optical and electronic fields such as semiconductors and nano-transistors, but also can be used as lubricants, antioxidants, catalysts, etc., and is widely used in aviation, automobiles, mining, shipbuilding, bearings and other industrial fields. 

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

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Nuzzle Tip, Machined from TZM Rod, Is Essential for Hot Runner System

HRSflow is completing the expansion of its 3,000-square-meter factory in San Polo di Piave, Italy. The expansion was designed according to lean production standards to make the hot runner assembly process more efficient. The goal is to ensure increased production capacity and provide customers with greater flexibility.

Since its introduction into the industry, hot runners have played a key role in improving the injection molding process. Although the capital cost is greater than that of cold runners, its ultra-high production efficiency makes it a long-term and economical choice. The improvement of system performance can produce parts with excellent appearance and increase part functions. In addition, the hot runner improves energy efficiency and saves plastic raw materials, thereby shortening cycle time and reducing part costs.

Companies in the world are implementing hot runners and seeking various solutions for further optimization considering its advantages. Of course, the focus of this article is not on this, but on one of the important parts- hot runner nuzzle tip. 

A hot runner system is an assembly of heated components used in plastic injection molds that inject molten plastic into the cavities of the mold. The used nozzle material is important as it affects production efficiency of the whole system, production cost and quality of finished plastic products. 

Pure molybdenum has a very high melting point, good strength, low thermal expansion coefficient and excellent thermal conductivity, and is a good comprehensive candidate material for most high-temperature applications. TZM is an acronym for "Titanium-Zirconium-Molybdenum", which is a molybdenum alloy. Its production method is powder metallurgy.

Although TZM is 25% more expensive than pure molybdenum, in some applications, the additional cost is offset by its increased strength at high temperatures. The recrystallization temperature of TZM is higher than that of pure molybdenum, which reduces the possibility of embrittlement at high temperatures. In high temperature applications, TZM has higher strength, hardness, creep resistance and ductility, which can ensure that it will not weaken or become soft.

Therefore, titanium-zirconium-molybdenum alloy is the most suitable material for nozzles at present. Chinatungsten Online is known for its high-quality products, outstanding service and attention to detail. The provided TZM rod has strict tolerance control and high processing yield. 

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

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

How MoS2 Improves Energy Storage Capacity in Lithium-ion Battery

In the development of sustainable technologies such as renewable energy and electric vehicles, the storage of electrical energy is as important as power generation. How to improve battery performance is a research field of great scientific significance. A large number of studies have shown that molybdenum disulfide (MoS2) composite materials play a key role in improving battery power, energy storage capacity, charging speed and stability.

As we all know, lithium-ion batteries are everywhere, from mobile phones to electric vehicle, thanks to its advantages of environmental protection, small size, light weight and no memory effect, but this does not mean the battery does not have any shortcomings. Actually, lithium-ion batteries have not been widely used in aviation, navigation and national defense due to their low energy density and high safety risks.

As a representative material for the negative electrode of commercial lithium-ion battery, graphite has good stability and conductivity, but it cannot store too much lithium ions between layers, thus significantly reducing the capacity of the battery. Normally, the more active lithium ions stored in the electrode, the greater the capacity of the battery. In addition, the battery can get higher efficiency if lithium ion diffusion rate can be faster. 

But researchers have found that MoS2 can be used to replace graphite anodes to improve the energy storage capacity.

MoS2 is a two-dimensional layered material with a naturally adjustable band gap. Its unique properties have attracted the attention of scientific researchers and have important application prospects in the fields of microelectronics, optoelectronics and batteries. Its wider interlayer spacing makes its storage capacity nearly twice that of graphite.

New research shows that MoS2 can also play a role in the development of next-generation battery technologies including Li-O2 (air) and sodium ion batteries. Although these technologies have not yet been commercialized, electrodes using MoS2 or MoS2/graphene composites have shown excellent performance in laboratory tests. In sodium ion batteries, the wider interlayer spacing of MoS2 than graphite is essential to accommodate larger Na+ ions. Besides that, the storage capacity of sodium-ion batteries with composite electrodes is higher than the combined battery capacity of MoS2 and graphene electrodes alone.

The challenge of battery technology is the need to store more electrical energy, provide more electrical energy, and be able to charge faster. The results from laboratory show that MoS2 can play a role in the future battery economy. With the development of large-scale manufacturing processes, MoS2 composite electrodes are expected to play an important role in meeting the challenges of energy storage.

If you have any inquiry of MoS2, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Advantages and Applications of Molybdenum Electrode for Glass Manufacture‎

Molybdenum electrode is made of pure molybdenum material by powder metallurgy, which has very high purity of 99.95% minimum and a density of 10g/cm3 minimum to ensure the quality of finished glasses and the service life of electrode. 

In Chinatungsten Online, regular diameters of moly electrode range from 20mm to 155mm and the length can reach 1000mm or more, depending on the usage of clients. Usually, the electrode is machined with thread – outer thread or both outer and inner threads. Actually, the current moly electrode replaces original heavy oil and gas energy, effectively reducing environmental pollution and improving the quality of glass.

Advantages 

The material of molybdenum is softer than tungsten material and has an incomparable modulus of elasticity with tungsten. Moreover, moly electrode has high melting point, good machining, corrosion resistance, low expansion, ultra-high strength and rigidity, excellent thermal conductivity, good ductility, easy manufacturing, low emissivity, low resistivity, low vapor pressure, etc.

Applications 

Thanks to its superior characteristics, moly electrode can be applied in different fields. For example, it can be used for welding non-ferrous metals (copper, aluminum, nickel), such as copper braid for switches welding with metal sheet. And considering its high temperature strength, high temperature oxidation resistance, long service life, corrosion resistance and not easy to color glass, moly electrode is widely used in daily-use glass, optical glass, insulation materials, glass fiber, rare earth industry and other fields.

The impurity and grain size of molybdenum powder directly affect the performance of the electrode, and the addition of trace rare earth alloy elements to the electrode can improve the particle size and performance of the molybdenum electrode. At the same time, the selection of raw materials and process control in the process of preparing molybdenum electrodes also affect the performance of the product to varying degrees.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum with more than 20 years’ producing experience. The Glass Melting Electrodes (GMEs) we provided has very high purity and long service life. 

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

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.