Why Tungsten Crucibles and Molybdenum Crucibles Are Used for Sapphire Crystal Growth?

Crystal growth is the foundation of many cutting-edge technologies such as sapphire touchscreens, LED lighting components, solar cells and high-power lasers. Corrosion resistance, creep resistance and high temperature properties enable tungsten and molybdenum crucibles to be used for high temperature sapphire crystal growth processes.

Crucibles made of tungsten and molybdenum materials perform well in the heat exchanger method (HEM) process for melting and solidification of single crystals. Better sapphire yield and quality can be achieved when the sapphire is easy to extract. Chinatungsten Online's tungsten and molybdenum-based crucibles feature heat resistance and smooth surfaces, making them durable and cost-effective. They are also corrosion resistant and have a high material density.

The crucible is made of tungsten or molybdenum material with high surface roughness. When the surface of the crucible is rough, the sapphire is not easy to be taken out, and the crystal is easily damaged. In addition, the crucible is also damaged in the process. Therefore, the surface smoothness of the crucible needs to be guaranteed during the production process, and sapphire manufacturers can also benefit from this product because it eliminates complex and costly processes. In addition, the smooth surface resists corrosion caused by aggressive fused sapphire, which can extend the life of reusable crucibles.

In addition, during the production process, the purity of the finished product needs to be guaranteed. The high-purity crucible will not contaminate the single crystal and ensure the quality of the finished single crystal.

Chinatungsten Online/CTIA GROUP LED has extensive expertise in powder metallurgy and has developed high-purity and high-density crucibles with uniform wall and bottom thicknesses, which are key prerequisites for excellent creep resistance. Molybdenum and tungsten crucibles are developing in multiple dimensions. Many customers and major manufacturers around the world have successfully used these crucibles.

If you have any inquiry of molybdenum crucible, please feel free to contact us:
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Molybdenum Foil for Applications of Electronic and Semiconductor Components

Molybdenum foil means thickness ranging from 0.002mm to 0.1mm, which is manufactured by cold rolling molybdenum sheet to a lower thickness. The typical thickness is 0.03mm to 0.1mm which is cold rolled by 20 rolls reversible mill. Normally, 0.01mm thickness is rarely found in the market and the MOQ for customized size is 3kgs. 

Molybdenum has a melting point of 2,623 °C, and has high modulus of elasticity. It is very popular because of its extremely high melting point and relative flexibility. When combined with steel and other metals, this combination makes the material highly resistant to extreme temperatures and chemical corrosion. This property is useful when dealing with energy applications, reactive chemicals, high-strength motors, filaments, industrial molds, and so on. 

Thanks to the characteristics of molybdenum metal, molybdenum foil has excellent tensile strength and elasticity at different temperatures, and has high heat resistance in a high temperature environment. Therefore, the product is ideal for high temperature vacuum furnace, coating, electronic and semiconductor component applications. In addition, the foil has an extremely low vapor pressure and high melting point, making it ideal for coating applications as evaporation boats.

All molybdenum foils provided by Chinatungsten Online/CTIA GROUP LED undergo various tests to meet customers’ requirements. We guarantee that the quality received by the customer has the required flatness, surface roughness, machinability. Our levelling and vacuum heat treatments ensure that our molybdenum products have high density and defect-free surfaces.

We are able to provide electropolishing, alkaline cleaning, polishing and molybdenum etching of surface treatment. Our knowledgeable engineers can ensure that our products meet every technical parameter required by our customers in various surface conditions. Strip, square and round foil with various sizes and surface conditions are welcomed to be customized. 

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

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Advantages of Molybdenum Disulfide Coating Based on MoS2

Molybdenum is a lustrous silver metal found in the earth's crust at 1.5 ppm. In many cases, it is very similar to tungsten, which is often paired with tungsten in the transition series of the periodic table, but their chemistry often exhibits more pronounced differences than expected.

The metal can withstand extremely high temperatures without significantly changing, expanding or softening. This ability makes its engagement in high temperature situations very useful. Typical applications of molybdenum are various, such as crucibles, evaporation boats, propulsion components, glass melting electrodes, high temperature furnaces, sputtering targets, heat sinks. 

Molybdenum disulfide (MoS2), one of the compounds of molybdenum, is used as a high temperature lubricant. The molybdenum disulfide coating is a solid lubricant based on MoS2 and containing an organic binder. The thickness of the coating is very thin, which does not affect the size and mechanical strength of the parts. Under the action of pressure, the coating is not easy to be squeezed out of the friction contact surface, so the bearing capacity is high. Under various special working conditions such as high temperature, low temperature, high altitude and heavy load, etc., the performance of general grease cannot be adapted, and molybdenum disulfide lubricant can be used for lubrication.

Advantages of molybdenum disulfide coating:

1. Improve the relationship between torque and pressure

It can effectively improve the relationship between torque and pressure of high-end fasteners, so that the fasteners can withstand greater loads and are less likely to loosen.

2. Solve the problem of fastener jamming and occlusion

The surface of the high-end fasteners coated with MoS2 coating is not easy to rust, stick and bite after use.

3. Solve the problem of ultra-high temperature and ultra-low temperature lubrication

At temperatures between -255°C and 300°C, the coating applied to high-end fasteners does not become embrittled and still has lubricating properties.

4. Solve the problem of wear resistance and self-lubrication

Based on the excellent wear resistance and self-lubricating properties of the coating, high-end fasteners can be repeatedly loosened and locked repeatedly without damage to the wire teeth.

5. Solve the problem of anti-rust and anti-corrosion

The MoS2 coating will form a dense and firm lubricating film on the surface of high-end fasteners, which will cut off the contact between the metal substrate and the air, making it less prone to corrosion.

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

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The Latest Price of Molybdenum Sheet

The latest price of φ100x0.5mm molybdenum sheet is 6.50 USD/PC on April 25, 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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The Latest Price of Glass Melting Molybdenum Electrode (GME)

The latest price of Ø68x700mm glass melting molybdenum electrode (GME) is 1,790.00 USD/PC on April 25, 2022.

The electrode made of molybdenum has good advantages of high melting point, high strength and hardness at high temperature, as well as good electrical and thermal conductivity and good corrosion resistance. The use of moly electrodes to replace the original heavy oil and gas energy can effectively reduce environmental pollution and improve the quality of glass. Molybdenum electrode rod is a kind of molybdenum electrode product, its surface is bright gray metallic luster with density more than 10.15g/cm3. They are mainly used for electric glass furnaces, electric light sources and electric vacuum parts.

If you have any inquiry of molybdenum electrodes, please feel free to contact us:
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What Are Functions of Molybdenum Disulfide in Fluoroplastics Industry?

What are applications of plastic in daily life? 

1,General purpose plastics: large output, wide application, good formability and low price. Widely used in daily necessities, packaging materials and small mechanical parts. Its output accounts for about 90% of the world's total plastics, also known as bulk plastics, most of which are thermoplastics.

2,Special plastics: plastics with special properties in a certain aspect used in special environments, also known as functional plastics, such as medical plastics, magnetically conductive plastics, thermally conductive plastics, superconducting plastics, radiation-resistant plastics, high-temperature plastics, etc. These plastics have small output, high price and excellent performance.

3,Engineering plastics: plastics that can be used as engineering structural materials with excellent mechanical properties, can withstand mechanical stress in a wide temperature range and are used in harsh chemical and physical environments. Small output, high price, excellent chemical properties, wear resistance, heat resistance, corrosion resistance, self-lubrication and dimensional stability, this kind of plastic also has some metal properties, which can replace some metal materials for the manufacture of structural parts and transmission parts. They are widely used in machinery manufacturing, light industry, electronics, aerospace, missiles, atomic energy and other industrial fields.

What are functions of molybdenum disulfide in the plastic industry? 

Molybdenum disulfide (MoS2) is a wear-resistant additive mainly used in nylon plastics. It acts as a crystallizing agent to improve the crystallinity of nylon and make the nylon material form a hard and wear-resistant surface. This kind of powder has high affinity with metals. After being adsorbed on the metal surface, the molecules of moly disulfide will block the microscopic pores on the metal surface that can only be seen by a microscope, making the metal surface smoother. In this regard, MoS2 is an ideal wear-resistant additive for nylon-metal friction.

The global plastics industry is large and growing. Driven by new products such as gas storage tanks, shipping tanks and clear plastic containers, the growing demand for larger parts with more complex designs and better performance will continue to require more injection molding equipment and tooling. Moly disulfide will continue to function as it always has, providing the fluoroplastics industry with greater strength, stability, durability and high surface quality.

Chinatungsten Online/CTIA GROUP LTD is a professional manufacturer of tungsten and molybdenum. If you have got the purchasing plans for them, please feel free to contact us. 

If you have any inquiry of molybdenum disulfide, please feel free to contact us:
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Molybdenum Copper Heat Sinks for Gallium Arsenide in Defense Industries

Controlling heat dissipation in sealed equipment housing electronic components is a major challenge in the electronics industry. Molybdenum copper and tungsten copper composite materials are engineered through wrought powder technology to provide higher thermal conductivity and highly controllable thermal expansion, so as to meet the requirements of the applications. 

Key applications for molybdenum copper materials include heat sink materials, bases, substrates, heat sinks, machined components and material blanks. Among them, molybdenum copper heat sinks are widely used in microwave carriers, ceramic substrate carriers, laser diode brackets, optical packaging, power packaging, butterfly packaging and crystal carriers for solid-state lasers.

Due to its excellent thermal conductivity and controlled thermal expansion, molybdenum-copper/tungsten-copper composites are the preferred materials for gallium arsenide (GaAs) and gallium nitride (GaN) semiconductors in defense industries such as advanced active radar, electronic countermeasures and interfering devices. Additionally, molybdenum copper thermal management materials can be shaped and easily plated with nickel or gold, and have excellent through-thickness thermal conductivity compared to other products.

Heat sink materials can provide different thermal expansion rates. Chinatungsten Online can design for specific I/C materials. While our molybdenum-copper and tungsten-copper materials are available in standard chemistry steps of 5%, we have the expertise to manufacture custom engineered products in small batches to allow for very specific expansion rates and CTE matched custom compositions.

Since the surface laminate CPC is pure copper, it has an excellent initial heat dissipation effect on the surface. We provide a variety of molybdenum copper grades according to customer needs, including CM-15, PCM30, PCM35, PCM40, RCM60, CPC141, CPC232, CPC111, CPC212, CPC-300, Mo90Cu10, Mo80Cu20, Mo75Cu25, Mo70Cu30, Mo60Cu40, Mo50Cu50. Other different grades can also be customized. Kindly contact us directly by email or WeChat for more details.

If you have any inquiry of molybdenum copper heat sinks, please feel free to contact us:
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