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Machine Processed Molybdenum Boat

Non-welded machine processed overall molybdenum boat, using high-purity molybdenum billet (Mo1, purity ≥ 99.95%, or molybdenum-lanthanum alloy, TZM alloy) as raw material, through CNC numerical control milling to hollow out the entire piece, without welding, bending or riveting connection throughout the process. Different from the conventional folded-welded molybdenum boats and riveted molybdenum boats on the market, it is a specialized material carrier boat and evaporation boat for high-end vacuum and high-temperature working conditions.

Non-welded machine processed overall molybdenum boat product parameters

Products name	Non-welded machine processed overall molybdenum boat
Products model	Mo1
Products material	Pure molybdenum
Purity	≥99.95% (3N5), capable of being made into 4N high-purity Integrated billet, without introducing welding material impurities
Density	10.22 g/cm³ (at 20℃)
Melting point	2620℃,High melting point refractory metals, suitable for long-term use in vacuum / protective atmosphere at temperatures up to 1600℃
Boiling point	4639 degrees Celsius
Crystal structure	Body-centered cubic (BCC)
Thermal conductivity at 20℃	138~142 W/(m·K) .Good heat conductivity, uniform heating of the vessel body, suitable for resistance evaporation
Linear expansion coefficient	5.2×10⁻⁶ /K (at room temperature) Very low thermal expansion coefficient, small deformation under thermal cycling
Room temperature resistivity	0.053 Ω·mm²/m,0.053 Ω·mm²/m Excellent electrical conductivity, suitable for power supply evaporation source
Elastic modulus	310 GPa,High rigidity , High rigidity,Not easily deformed
High-temperature vapor pressure 1800℃	1×10⁻⁴ Pa; 2200℃： 5×10⁻² Pa The extremely low high-temperature vapor pressure makes the vacuum process less prone to volatilization and contamination of the workpiece, a key advantage in the coating industry.
Recrystallization temperature	Pure molybdenum: around 1100℃; Molybdenum-lanthanum: 1400 - 1500℃; TZM: 1700 - 1800℃,After recrystallization, molybdenum becomes brittle; Molybdenum-lanthanum and TZM have much better creep resistance and sag resistance than pure molybdenum.
Surface condition	CNC machining / polishing are optional Integrated processing, uniform wall thickness, controllable surface roughness, no weld seam grooves

Core product features

1. Truly without weld seams or connection interfaces The entire raw material is directly machined into shape without weld seams, solder, or welding stress, eliminating the weakest position that is prone to failure in traditional welded molybdenum boats, and preventing cracking and leakage of weld seams under high-temperature cycles from the root.

2. High dimensional accuracy, uniform wall thickness controllable Numerical control precise processing, stable control of length, width, depth, parallelism, straightness, bottom slot roundness, step tolerance; the inner wall can be mirror-polished, with high surface finish, no gaps or dead corners.

3. High temperature resistance, low vapor pressure, pure material The melting point of molybdenum is 2620℃, and it can be used stably at around 1600℃ under vacuum, hydrogen, and inert protection atmosphere; it has very little impurities when decomposing at high temperatures, and will not contaminate high-purity materials. The molybdenum-lanthanum and TZM alloy versions have stronger resistance to creep and high-temperature deformation.

4. Uniform heat and electrical conductivity The base material is continuous and consistent, without abnormal resistance or heat conduction in the welding area, and the heating and heating of the furnace chamber are uniform, with good temperature consistency of the entire boat.

5. High structural freedom, supports customization We can process flat-bottomed slots, with flanges, flow channels, blind holes, through holes, special rounded corners, step cavities, etc. structures according to the special drawings of customers, and will not be restricted by bending or welding processes. Complex structures can also be realized according to the requirements of the drawings.

Products Applications

1.The vacuum thermal evaporation coating industry is a major application field.

Optical lens coating, AR/AF coating, mobile phone lenses, display screens, decorative aluminum coating, reflective film, resistive evaporative sources for precious metals (gold, silver, chromium, aluminum). Due to the integrated structure without welds, impurities will not fall off, making it suitable for high-end optical coating and precision film production lines.

2. Powder metallurgy, hard alloys, rare magnetic materials

Hard alloy blanks, rare permanent magnet powders, ceramic powders, fluorescent powders, metal powders' vacuum degreasing, high-temperature sintering, annealing support. Avoid powder leakage from welds and cracking and material leakage at high temperatures.

3. Semiconductors, electronic components, new energy materials

4. Rare precious metals, refractory metals purification and smelting

The integrated sealed structure ensures that the molten materials will not leak through the gaps.

5. Universities, research institutes, scientific research laboratories

Tube-type vacuum furnaces, high-temperature experimental furnaces sample carriers, new material research, high-temperature thermal analysis, sintering tests, supporting the customization of complex irregular cavities.

6. Aerospace, military, special high-temperature heat treatment