{"id":1514,"date":"2024-01-03T02:42:09","date_gmt":"2024-01-03T02:42:09","guid":{"rendered":"https:\/\/am-printing.com\/?p=1514"},"modified":"2024-01-03T02:42:38","modified_gmt":"2024-01-03T02:42:38","slug":"molybdenum-disilicide-powder","status":"publish","type":"post","link":"https:\/\/am-printing.com\/ja\/molybdenum-disilicide-powder\/","title":{"rendered":"\u4e8c\u30b1\u30a4\u5316\u30e2\u30ea\u30d6\u30c7\u30f3\u7c89\u672b"},"content":{"rendered":"\n

molybdenum disilicide powder<\/a> is an intermetallic ceramic compound with high thermal conductivity, temperature resistance, and oxidation resistance. This guide provides an overview of MoSi2 powder properties, manufacturing methods, industry applications, and suppliers.<\/p>\n\n\n\n

Introduction to molybdenum disilicide powder<\/h2>\n\n\n\n

Molybdenum disilicide is an inorganic chemical compound composed of molybdenum (Mo) and silicon (Si). Key properties include:<\/p>\n\n\n\n

Table 1:<\/strong> MoSi2 powder overview<\/p>\n\n\n\n

Properties<\/th>Details<\/th><\/tr><\/thead>
Composition<\/td>Molybdenum – ~65% Silicon – ~35%<\/td><\/tr>
Density<\/td>6.24 g\/cm3<\/td><\/tr>
Melting point<\/td>2,630\u00b0C<\/td><\/tr>
Thermal conductivity<\/td>~100 W\/m-K<\/td><\/tr>
Electrical resistivity<\/td>18-22 \u03bc\u03a9-cm<\/td><\/tr>
Oxidation resistance<\/td>Up to ~1,650\u00b0C in air<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

These attributes make MoSi2 useful for heating elements, contacts, and composites able to withstand extremely high temps under load in oxidizing environments.<\/p>\n\n\n\n

\"molybdenum<\/figure>\n\n\n\n

Chemical Composition and Crystal Structure<\/h2>\n\n\n\n

The stoichiometric chemistry of molybdenum disilicide consists of:<\/p>\n\n\n\n

Table 2:<\/strong> MoSi2 standard composition<\/p>\n\n\n\n

Element<\/th>Weight %<\/th><\/tr><\/thead>
Molybdenum<\/td>~65%<\/td><\/tr>
Silicon<\/td>~35%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

However actual composition can range from MoSi1.75 to MoSi2.2 to tailor properties. The tetragonal unit cell has a body-centered structure with Mo atoms surrounded by Si atoms.<\/p>\n\n\n\n

Mechanical and Thermal Properties<\/h2>\n\n\n\n

Table 3:<\/strong> MoSi2 powder properties<\/p>\n\n\n\n

Property<\/th>Value<\/th><\/tr><\/thead>
Density<\/td>6.24 g\/cm3<\/td><\/tr>
Melting Point<\/td>2,630\u00b0C<\/td><\/tr>
Thermal Conductivity<\/td>~100 W\/m-K<\/td><\/tr>
CTE<\/td>~6.5 x 10-6\/K<\/td><\/tr>
Flexural Strength<\/td>~340 MPa<\/td><\/tr>
Compressive Strength<\/td>~1,000 MPa<\/td><\/tr>
Vickers Hardness<\/td>~800 kgf\/mm2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The refractory nature, oxidation resistance, thermal shock parameter, and thermal expansion coefficient make MoSi2 suitable for extreme heating element environments.<\/p>\n\n\n\n

Production Processes for MoSi2 Powder<\/h2>\n\n\n\n

Common methods for producing MoSi2 powder include:<\/p>\n\n\n\n

Table 4:<\/strong> MoSi2 powder production processes<\/p>\n\n\n\n

Method<\/th>Description<\/th>Particle Characteristics<\/th><\/tr><\/thead>
Self-propagating high-temperature synthesis (SHS))<\/td>Combustion synthesis by highly exothermic redox reactions<\/td>Irregular morphology, wide distribution<\/td><\/tr>
Arc-melting<\/td>Electrodes melted in water-cooled copper crucible<\/td>Spherical uniform powder<\/td><\/tr>
Plasma spheroidization<\/td>Arc-melting variant with inert gas plasma<\/td>Highly spherical powder<\/td><\/tr>
Silicothermic reduction<\/td>Reducing molybdenum trioxide with silicon<\/td>Agglomerated powder<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Advanced methods enable tailoring powder shape, size distribution, purity, density, and microstructure suitable for technical ceramics.<\/p>\n\n\n