Molybdenum crucibles are suitable for industrial furnace equipment, especially in high temperature, vacuum or inert gas protection environments. The following is a specific analysis:
- The core advantages of molybdenum crucible in industrial furnace
High temperature resistance
Melting point up to 2610℃: Molybdenum crucible can work stably in high temperature environment above 2000℃, meeting the high temperature requirements of industrial furnaces (such as vacuum induction melting furnace and electron beam melting furnace).
Thermal shock resistance: Low thermal expansion coefficient (5.5×10 ⁻⁶ / ℃) reduces cracking or deformation caused by thermal stress and extends service life.
Chemical stability
In an inert gas or vacuum environment: Molybdenum crucibles are not easy to react chemically with molten metals (such as titanium, tungsten, and molybdenum), thus avoiding the introduction of impurities and ensuring the purity of the material.
Corrosion resistance: It has good corrosion resistance to most molten metals (such as nickel-based alloys and cobalt-based alloys).
High thermal conductivity
Fast and uniform heat transfer: Molybdenum crucible has excellent thermal conductivity, which can reduce temperature gradient, improve melting uniformity and yield rate.
- Applicable industrial furnace types and scenarios
| Industrial furnace type | Applicable scenarios | Advantages |
| Vacuum Induction Melting Furnace | High temperature alloy melting, single crystal silicon growth | High temperature stability, chemical inertness, low contamination risk |
| Electron beam melting furnace | High purity metal smelting, powder metallurgy | High temperature homogenization and rapid melting capability |
| Plasma Melting Furnace | Powder spheroidization, metal surface treatment | Stability under high-energy particle bombardment |
III. Potential Challenges and Solutions
Oxidation Problem
Challenge: In an oxygen-containing environment, molybdenum is easily oxidized to form volatile MoO₃, resulting in material loss.
Solution: Use under vacuum or inert gas (such as Ar, N₂) protection, or use surface coating technology (such as Mo₂C, ZrO₂) to delay oxidation.
Mechanical performance limitations
Challenge: The strength of molybdenum decreases with increasing temperature (e.g., the tensile strength is about 200 MPa at 1200°C).
Solution: Enhance the corrosion resistance by optimizing the molybdenum plate preparation process (such as controlling the crystal growth direction, reducing the impurity content), or using composite materials (such as molybdenum -based composite coatings).
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