In the glass melt tank, the refractory bricks are exposed unprotected to the aggressive glass melt. This results in corrosion, abrasion, and erosion, which significantly reduces the service life of the glass melt tank. In addition, this wear can also have a negative impact on the glass result as well as the glass quality.
Platinum and molybdenum are the only metals that are able to withstand the high temperatures and chemical corrosion caused by the glass melt. Platinum is very expensive, whereas molybdenum is the economical, high-performance alternative.
Highest purity for bubble-free application (min.
99.97%)
Excellent
corrosion resistance
High creep
resistance
Optimum protection against oxidation via a Sibor® coating
Customer-specific
solutions
In-house construction and manufacturing
We can customize the design of our glass tank reinforcements to the individual requirements of your glass tank. We work with very strict tolerances so that everything will fit perfectly. You can rely on our experienced furnace designers.
Please see the product specifications for details about our products:
Molybdenum exhibits excellent corrosion resistance with regards to most glass melts. Low material removal rates are the deciding factor for a long service life of glass melt components and also have a major influence on the final quality of the glass.
Plansee |
Standard |
|
| Major and minor components |
Minimum content [%] |
ASTM B387 (361) |
| Mo | 99.97% a | Remainder |
| Impurities | Maximum values [µg/g] | Minimum values [µg/g] |
| Guaranteed | ||
| Al | 10 | - |
| Cr | 20 | - |
| Cu | 20 | - |
| Fe | 20 | 100 |
| K | 20 | - |
| Ni | 10 | 50 |
| Si | 20 | 100 |
| W | 300 | - |
| C | 30 | 100 |
| H | 10 | - |
| N | 10 | 20 |
| O | 40 | 70 |
| Cd | 5 | - |
| Hg | 1 | - |
| Pb | 5 | - |
a) Metallische Reinheit ohne W
Molybdenum begins to oxidize at over 400 °C. We developed Sibor® – our oxidation protection for molybdenum – to protect tank reinforcement components from oxidation during the heating process. Sibor® protects molybdenum from oxidation up to 1700 °C (3092 °F). The very hard, dense coating creates a diffusion barrier along the base material and forms an SiO2 seal against the air. This protects the material against oxidation for up to 5000 h depending on the operating temperature.
Alongside varied reinforcement components for glass melt tanks, Plansee offers a wide product range for glass production. Our high-quality products made from molybdenum and tungsten are designed to maximize the efficiency and durability of glass production systems and to optimize production processes.
Learn more about our products for glass production in this video:
