DM-9 Medium temperature electrical grade magnesium oxide powder
1、Summarize
DM-9 is a yellow cubic crystalline particles of medium temperature electrical grade magnesium oxide powder, adding an appropriate amount of silicone oil, with moisture-proof performance, the use temperature is less than 700℃, mainly used for less than 700℃ dry heating heat pipe and high power water heating heat pipe. It has good fluidity and thermal conductivity, high insulation and resistance to penetration.
The heating tube made by DM-9(FC) can be dried at less than 300 ° C for 1 hour, and can be directly sealed by simple sealing.
2、Chemical composition
| Name | MgO | CaO | Fe2O3 | SiO2 | Al2O3 | LOS | Magnetic substance |
| Index | ≥96 | ≤2.0 | ≤0.5 | ≤2.5 | ≤0.5 | ≤0.5 | ≤100 |
3、Physical index
1、Density, flow rate, velocity
T.D=2.28-2.36 g/cm³ 3# F.R≤150 S/100g 4# F.T≤37 S /100g
2、Particle size distribution：
| Name | +40 | +60 | +80 | +140 | +200 | +325 | -325 |
| Specification | 0.425 | 0.25 | 0.18 | 0.106 | 0.075 | 0.045 | -0.045 |
| % | ≤3 | 30±5 | 25±5 | 25±5 | 10±5 | 10±5 | 5±2 |
4、Electrical property
Sample tube： Φ6.6mm L hot=780mm 220V 1616W Materials：304B
1、Normality：≥1000 MΩ ≥2500 V
2、Hot state： 7 W/c㎡ 15min Leakage current≤0.5 mA
Hot insulation≥20.0 MΩ Hot pressure resistant≥1800 V
Note: (1) The pipe is above 500℃ and the tide is drained for 60 minutes; (2) Hot voltage resistance is tested after the heat pipe is cooled to room temperature.
5、Store
1, DM-9 should be stored in a ventilated, dry, cool place, avoid direct sunlight, rain. A location far from water sources; Temperature ≤45℃, humidity ≤75%RH conditions;
2, the surrounding environment is prohibited from volatile, corrosive substances such as acid, alkali, salt, to prevent pollution of goods.
3, magnesium oxide powder storage process, distance from the ground more than 100mm, to avoid the ground water vapor or other liquid pollution of magnesium oxide.
4, it is recommended to use up within 12 months after delivery, and it is recommended to bake before use. Unpack unused goods, open the recommended 3 days to use up; It is recommended to use the seal within 10 days.
5. During the use of magnesium oxide, if there is any surplus, the packaging mouth should be sealed and placed in a dry position to prevent air from entering; Bake before using again.
6, recommended use process to avoid magnesium powder contamination, need to wear rubber gloves operation.
