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Diffusil®-T is manufactured from a mix of synthetically produced raw materials and raw materials of natural origin using a special Sol-Gel process.
Due to the special mix of raw materials, it can be used especially in higher temperature ranges, as the softening point is higher. Diffusil®-T also contains evenly distributed gas bubbles of about 4 µm diameter. However, the quantity and size of the gas bubbles are fixed and cannot be specially adjusted.
Diffusil®-T is mainly used in high temperature applications.
Thermal Properties
| Thermal conductivity | |||||||
|---|---|---|---|---|---|---|---|
| Temperature in °C | 20 | 100 | 200 | 400 | 600 | 800 | 1,000 |
| Thermal conductivity W / m*K | 1,25 | 1,32 | 1,48 | 1,70 | 1,78 | 1,84 | 1,91 |
| Thermal conductivity | |||||||
|---|---|---|---|---|---|---|---|
| Temperature in °C | Thermal conductivity W / m*K | ||||||
| 20 | 1,25 | ||||||
| 100 | 1,32 | ||||||
| 200 | 1,48 | ||||||
| 400 | 1,70 | ||||||
| 600 | 1,78 | ||||||
| 800 | 1,84 | ||||||
| 1,000 | 1,91 | ||||||
| Thermal expansion coefficient: | 5.5 x 10-7 • K-1 (20 °C – 500 °C) |
| Softening point: | 1,650 °C |
| Max. working temperature - short term: | 1,250 °C |
| Max. working temperature - long term: | 1,050 °C |
| Thermal expansion coefficient: |
| 5.5 x 10-7 • K-1 (20 °C – 500 °C) |
| Softening point: |
| 1,650 °C |
| Max. working temperature - short term: |
| 1,250 °C |
| Max working temperature - long term: |
| 1,050 °C |
Chemical Properties
The raw materials used in the manufacturing process of Diffusil®-T are mainly synthetically produced – but also include materials of natural origin. The typical trace impurities of this material quality are shown below:
| Trace impurities [ppm / weight] | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Al | Ca | Cu | Fe | K | Li | Mg | Na | Ti | Zr |
| < 2,00 | < 2,00 | < 0,02 | < 0,50 | < 2,00 | < 0,05 | < 0,20 | < 0,75 | < 0,50 | < 0,10 |
| Trace impurities [ppm / weight] | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Al | < 2,00 | ||||||||
| Ca | < 2,00 | ||||||||
| Cu | < 0,02 | ||||||||
| Fe | < 0,50 | ||||||||
| K | < 2,00 | ||||||||
| Li | < 0,05 | ||||||||
| Mg | < 0,20 | ||||||||
| Na | < 0,75 | ||||||||
| Ti | < 0,50 | ||||||||
| Zr | < 0,10 | ||||||||
| OH-Content: | appr. 300 ppm / weight |
| Acid resistancy: | acc. Class 1; DIN 12 116 |
| Alkali resistancy: | acc. Class 1; DIN 52 332 |
| OH-Content: |
| appr. 300 ppm / weight |
| Acid resistancy: |
| acc. Class 1; Din 12 116 |
| Alkali resistancy: |
| acc. Class 1; DIN 52 322 |
Physical Properties
| Density: | 2,17 g / cm³ |
| Porosity: | < 5 %, non-open Porosity |
| Modulus of elasticity: | 50 - 54 kN / mm² |
| Bending strength (3-point): | 80 - 84 N / mm² |
| Density: |
| 2,17 g / cm³ |
| Porosity: |
| < 5 %, non-open Porosity |
| Modulus of elasticity: |
| 50 - 54 kN / mm² |
| Bending strength (3-point): |
| 80 - 84 N / mm² |
Optical Properties
Evenly distributed gas bubbles in the material lead to a uniformly high opacity of Diffusil®-T.
The majority of the bubbles in the material have a diameter of approx. 4 µm. Occasionally, however, there may also be bubbles with larger diameters.
Electrical Properties
| Dielectric constant: | Electrical resistivity: |
|---|---|
| 3,70 (20 °C 1·106 Hz) | 1,0 x 1018 Ω · cm (20 °C) |
| 3,77 (23 °C 9·108 Hz) | 1,0 x 1010 Ω · cm (400 °C) |
| 3,81 (23 °C 3 ·1010 Hz) | 6,3 x 106 Ω · cm (800 °C) |
| Dielectric constant: | Electrical resistivity: |
|---|---|
| 3,70 (20 °C 1·106 Hz) | 1,0 x 1018 Ω · cm (20 °C) |
| 3,77 (23 °C 1·108 Hz) | 1,0 x 1010 Ω · cm (400 °C) |
| 3,81 (23 °C 1·1010 Hz) | 6,3 x 106 Ω · cm (800 °C) |
We answer your questions
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