Luoyang Rare Metal Research Material Co.,Ltd

Molybdenum sheet is a thin sheet or plate made of metal molybdenum. Molybdenum is a metal element belonging to transition metal, with atomic number 42 and symbol Mo. The surface of molybdenum sheet is dark brown, and if washed with alkali, it will have a silver-gray metallic luster. It has high purity, excellent thermal conductivity and electrical conductivity, low thermal expansion coefficient and good high-temperature creep resistance. It is widely used in high temperature, electronics, aerospace and other fields. 1.Molybdenum Sheet Properties 1)Physical properties: - High melting point: 2623°C, second only to tungsten (3410°C) among metals, suitable for high temperature environment. - Density : 10.2 g/cm3, lighter than tungsten (19.3 g/cm3), easier to process. -Thermal conductivity and electrical conductivity : Good thermal conductivity, electrical conductivity is about 30% of copper. - Mechanical properties : High strength is maintained at high temperature, and creep resistance is excellent. 2)Chemical properties : - Corrosion resistance: Good corrosion resistance to acids, alkalis, molten glass, etc. at room temperature, but easy to oxidize at high temperature (inert gas or vacuum environment protection is required). - Stability: Does not react with gases such as hydrogen and nitrogen, suitable for use in vacuum or inert atmosphere. 2. Manufacturing Process of Molybdenum Sheet 1)Raw material preparation : - Molybdenum usually exists in the form of molybdenum powder, and is made into billets through powder metallurgy technology (pressing, sintering). 2) Rolling processing : - The billet is rolled at high temperature (1200-1500°C) into thin sheets, with a thickness ranging from a few microns to several millimeters. 3) Subsequent treatment : - Annealing : Eliminate stress and improve ductility. - Surface treatment : polishing, pickling or coating --- 3. The Main Application of Molybdenum Sheet 1) Electronics and semiconductor industry : - Sputtering target : used for thin film deposition, manufacturing integrated circuits, displays (such as OLED). - Semiconductor bracket : used for chip packaging due to its low thermal expansion coefficient. 2) High temperature field : - Furnace body parts : high temperature furnace insulation screen, reflective screen in sapphire crystal growth furnace, heating element support. - Aerospace : rocket nozzle, turbine blade coating substrate. 3) Medical equipment : - X-ray tube anode : using its high melting point and thermal conductivity, it withstands electron bombardment to produce X-rays. 4) New energy and nuclear industry : - Nuclear reactor material : used as nuclear fuel cladding or structural material, resistant to radiation and high temperature. - Solar cell : back electrode material of thin film solar cell. --- 4. Specifications and Parameters of Molybdenum Sheets - Thickness : Commonly 0.01mm to 5mm, ultra-thin sheets (micrometer level) are used for precision devices. - Purity : Industrial grade purity =99.95%, high purity molybdenum sheets can reach 99.999%. - Surface state : Polishing (mirror), frosting or coating treatment. - Size : Customized, commonly sheet or disc shape (such as sputtering target). --- 5. Advantages and Disadvantages of Molybdenum Sheets Advantages : - Excellent high temperature performance and high strength retention rate. - Balanced thermal conductivity and electrical conductivity, suitable for electronic devices. - Strong corrosion resistance (except high temperature oxidation). Disadvantages : - Difficult processing, high temperature equipment required. - High cost (especially high purity products). - High temperature requires anti-oxidation protection. --- 6. Comparison Between Molybdenum and Other Materials - vs tungsten : Molybdenum is lighter and easier to process, but has a lower melting point. - vs graphite : Molybdenum has higher mechanical strength, but is more expensive. - vs copper : Molybdenum has better high temperature resistance, but poorer conductivity.
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