The Difference between Molybdenum Sheet and Molybdenum Plate

Molybdenum sheet and molybdenum plate are both forms of molybdenum, a metallic element with a high melting point and excellent thermal and electrical conductivity. The main difference between the two lies in their thickness and dimensions.

Molybdenum Sheet:
A molybdenum sheet refers to a thin, flat piece of molybdenum with a thickness typically ranging from 0.1mm to 1.0mm. It is usually supplied in rectangular or square shapes. Molybdenum sheets are often used in applications where a thin, flexible material with good thermal conductivity is required. They can be easily cut, shaped, or bent to meet specific needs. Molybdenum sheets are commonly utilized in the electronics industry, as heating elements, as a base material for vacuum evaporation, and in various research and development applications.

Molybdenum Plate:
On the other hand, molybdenum plate refers to a thicker and more rigid form of molybdenum. It has a thickness greater than 1.0mm and is available in various dimensions. Molybdenum plates are typically used in applications where strength and stability are crucial. They are commonly employed as structural components in high-temperature furnaces, molds for glass production, sputtering targets, heat shields, and in the aerospace industry. The thicker dimensions of molybdenum plates make them suitable for applications that require load-bearing capacity and resistance to deformation.

In summary, the key distinction between molybdenum sheet and molybdenum plate lies in their thickness and structural properties. Molybdenum sheets are thinner and more flexible, while molybdenum plates are thicker and offer greater strength and rigidity.

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Types of Molybdenum Rod

Molybdenum rods are commonly used in various industrial applications due to their high melting point, excellent strength, and good thermal and electrical conductivity. While there are different types of molybdenum rods available, they are primarily categorized based on their composition and specific properties. Here are some common types of molybdenum rods:

1. Pure Molybdenum Rods: These rods are made from pure molybdenum, which typically has a high purity level of 99.95% or higher. Pure molybdenum rods are known for their excellent thermal conductivity, high tensile strength, and resistance to corrosion. They are often used in high-temperature environments, such as in furnaces, aerospace applications, and electrical contacts.

2. TZM Molybdenum Rods: TZM (Titanium-Zirconium-Molybdenum) rods are alloyed with small amounts of titanium and zirconium, along with pure molybdenum. The addition of these alloying elements enhances the high-temperature strength, creep resistance, and recrystallization resistance of the rods. TZM molybdenum rods find applications in aerospace industries, defense, and high-temperature furnace components.

3. Lanthanated Molybdenum Rods: Lanthanated molybdenum rods, also known as lanthanum-doped molybdenum rods, contain a small amount of lanthanum oxide (La2O3). This doping improves the high-temperature strength, recrystallization resistance, and ductility of the molybdenum rods. Lanthanated molybdenum rods are commonly used in glass melting electrodes, furnace components, and electrical applications.

4. Molybdenum-Lanthanum (MoLa) Rods: These rods are a composite material consisting of a molybdenum matrix with dispersed lanthanum oxide particles. MoLa rods exhibit enhanced creep resistance, high-temperature strength, and improved resistance to oxidation compared to pure molybdenum rods. They are utilized in applications like glass industry electrodes, sintering boats, and vacuum furnaces.

5. Molybdenum-Copper (MoCu) Rods: MoCu rods are composed of a molybdenum matrix with a copper content. The copper acts as a strengthening agent, increasing the thermal conductivity and electrical conductivity of the rods. MoCu rods are widely used in heat sinks, electronic packaging, and high-power devices where efficient heat dissipation is crucial.

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Molybdenum Powder Characteristics

Molybdenum powder is a fine, grayish-black powder composed of molybdenum particles. It possesses several characteristics that make it valuable in various industrial applications. Here are some key characteristics of molybdenum powder:

1. High Melting Point: Molybdenum has an exceptionally high melting point of approximately 2,623 degrees Celsius (4,753 degrees Fahrenheit). This property makes molybdenum powder suitable for applications that require materials to withstand high temperatures.

2. High Density: Molybdenum is a dense material, with a density of about 10.2 grams per cubic centimeter. This high density makes molybdenum powder useful in applications where weight and space constraints are important considerations.

3. Excellent Strength and Hardness: Molybdenum powder exhibits high strength and hardness, which contribute to its ability to withstand mechanical stress, deformation, and wear. It is often used in alloys to enhance the strength and hardness of other materials.

4. Good Thermal Conductivity: Molybdenum is a good conductor of heat, with a thermal conductivity of approximately 138 watts per meter-kelvin. This characteristic makes molybdenum powder suitable for applications where efficient heat transfer is required.

5. Corrosion Resistance: Molybdenum has good resistance to corrosion and oxidation at elevated temperatures. It can withstand attack from acids, alkalis, and various chemicals. This corrosion resistance makes molybdenum powder suitable for applications in harsh environments.

6. Low Thermal Expansion: Molybdenum exhibits low thermal expansion, meaning it expands minimally when heated. This property allows molybdenum powder to maintain its structural integrity and dimensional stability under high-temperature conditions.

7. Good Electrical Conductivity: Molybdenum is a moderately good electrical conductor. It has an electrical conductivity of approximately 30% that of copper. This characteristic makes molybdenum powder suitable for electrical and electronic applications.

8. Refractory Properties: Molybdenum powder is classified as a refractory material, meaning it has a high resistance to heat and can withstand extreme temperatures without significant deformation or softening.

These characteristics make molybdenum powder valuable in various industries, including aerospace, electronics, energy, chemical processing, and automotive, where its unique properties are utilized in applications such as furnace components, catalysts, electrical contacts, heating elements, and high-temperature lubricants.

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Molybdenum Plates of Different Thicknesses

Molybdenum plates are commonly used in various industries due to their excellent mechanical, thermal, and electrical properties. They are often utilized in applications such as furnace components, semiconductor manufacturing, aerospace, and defense. Molybdenum plates are available in different thicknesses to suit specific requirements.

1. Thin Molybdenum Plates: These are generally available in thicknesses ranging from 0.1 millimeters (mm) to 1.0 mm. Thin molybdenum plates are commonly used in electronics, such as as back contact layers in thin-film solar cells or as heat sinks in integrated circuits.

2. Medium Molybdenum Plates: These plates usually have thicknesses ranging from 1.0 mm to 10.0 mm. They find applications in various industries, including furnace construction, glass manufacturing, and as structural components in high-temperature environments.

3. Thick Molybdenum Plates: Thick molybdenum plates typically have thicknesses ranging from 10.0 mm to 50.0 mm or even higher. These plates are used for demanding applications such as missile and aircraft parts, armor plating, and high-temperature crucibles.

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Molybdenum Electrode Plate for Industry

Molybdenum electrode plates are commonly used in various industrial applications due to the unique properties of molybdenum. Molybdenum is a refractory metal known for its high melting point, excellent electrical conductivity, and good corrosion resistance. These characteristics make it well-suited for demanding environments, such as high-temperature and high-stress applications. Here are some key points about molybdenum electrode plates in the industry:

1. High-temperature applications: Molybdenum electrode plates can withstand extremely high temperatures without significant deformation or damage. They are often used in industries such as glass manufacturing, furnace heating elements, and high-temperature furnaces.

2. Electrical discharge machining (EDM): Molybdenum electrode plates are frequently employed as electrodes in EDM processes. EDM is a machining method that uses electrical discharges to shape and cut conductive materials accurately. Molybdenum’s high melting point and electrical conductivity make it an ideal choice for EDM electrodes.

3. Corrosion resistance: Molybdenum exhibits good resistance to corrosion, making it suitable for applications involving corrosive environments. It is commonly used in the chemical industry, where it can withstand the effects of harsh chemicals and acids.

4. Thin-film deposition: Molybdenum electrode plates are utilized in thin-film deposition processes, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD). These techniques are used to create thin layers of materials on various substrates for applications such as semiconductor manufacturing, solar cells, and optical coatings.

5. Heat sinks and thermal management: Molybdenum electrode plates can be employed as heat sinks due to their high thermal conductivity. Heat sinks help dissipate excess heat from electronic components, ensuring optimal performance and preventing overheating.

6. Glass industry: Molybdenum electrode plates are extensively used in the production of glass, particularly in the manufacture of glass melting electrodes. Molybdenum’s resistance to thermal stress and its ability to maintain dimensional stability at high temperatures make it a preferred choice in glassmaking.

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The Principle of Molybdenum Disulfide Powder as A Dry Lubricant

Molybdenum disulfide (MoS2) powder is widely used as a dry lubricant due to its unique properties and structure. The principle behind its effectiveness lies in its layered crystal structure and low coefficient of friction.

Here’s how it works:

1. Crystal Structure: Molybdenum disulfide consists of stacked layers of molybdenum atoms sandwiched between layers of sulfur atoms. These layers are weakly bonded together by van der Waals forces. The individual layers have a hexagonal lattice structure.

2. Low Shear Strength: The weak interlayer bonding results in a low shear strength between the layers. When pressure or shear forces are applied, the layers can easily slide past each other, reducing friction and wear.

3. Lubrication Mechanism: When molybdenum disulfide powder is applied as a dry lubricant, the individual particles adhere to the contacting surfaces. The layered structure of MoS2 allows the particles to align parallel to the surface, creating a lubricating film.

4. Reduction of Friction: The thin lubricating film formed by MoS2 particles acts as a barrier between the sliding surfaces, reducing direct metal-to-metal contact. This separation minimizes friction and wear, resulting in improved efficiency and extended component life.

5. High Load-Carrying Capacity: Molybdenum disulfide has excellent load-carrying capacity due to its ability to withstand high pressures. The layered structure allows the load to be distributed across multiple layers, preventing localized stress and reducing the risk of surface damage.

6. Temperature Stability: MoS2 exhibits good thermal stability, making it suitable for a wide range of operating temperatures. It can withstand high temperatures without significant degradation, maintaining its lubricating properties.

Overall, the principle behind molybdenum disulfide powder as a dry lubricant lies in its layered structure, low shear strength, and the formation of a lubricating film that reduces friction and wear. These properties make it an excellent choice for applications where conventional lubricants cannot be used, such as in high-temperature environments or in situations where oil or grease would attract dirt or contaminants.

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