DM-G-2 High temperature electrician grade magnesium oxide powder
1、Summarize
DM-G-2(BFC) is a yellow cubic crystalline particles of high temperature electrical grade magnesium oxide powder, adding a small amount of silicone oil, does not have moisture resistance, the use temperature ≥1000℃, mainly used in dry burning heat pipe and industrial heat pipe. It has good fluidity and thermal conductivity, high insulation and resistance to penetration.
The heating tube made of DM-G2 needs to go through the annealing furnace at 1050℃ or turn green, and needs to be sealed in time after annealing.
2、Chemical composition
| Name | MgO | CaO | Fe2O3 | SiO2 | Al2O3 | LOS | Magnetic substance |
| Index | ≥97 | ≤2.0 | ≤0.4 | ≤2.5 | ≤0.5 | ≤0.5 | ≤100 |
3、Physical index
1、Density, flow rate, velocity
T.D=2.30-2.36 g/cm³ F.R≤150 S/100g 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： 10 W/c㎡ 15min Leakage current≤0.5 mA
Hot insulation≥5.0 MΩ Hot pressure resistant≥1800 V
Note: (1) Pipe 1050℃ furnace high temperature zone for 30 minutes; (2) Hot voltage resistance is tested after the heat pipe is cooled to room temperature.
5、Store
1, DM-G-2 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 6 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.
