How to Adjust the Temperature of Vapor Deposition Furnace
Mar 20,2023
Regarding the temperature adjustment point of the vapor deposition furnace, many people are paying attention to the actual peak temperature. Within the temperature range of the sintering furnace, too high will be regarded as over-burning, and too low will be regarded as insufficient burning. Both situations are not Good sintering effect, firmly grasping the temperature control is the key to find the sintering temperature range. So, let's learn how to adjust the temperature of the next vapor deposition furnace!
In the case of insufficient sintering in the vapor deposition furnace, if a silver paste penetrating through silicon nitride remains, the amount of silver paste entering the n-type layer also decreases, the ohmic contact effect is poor, and the resistance of the series connection increases. In the case of excessive firing, the amount of consumption of silver is larger than usual, and a mixed layer is formed of silver and silicon, and this mixed layer is hindered, so that the resistance of the series connection becomes too large. Therefore, it is impossible to speculate whether it is an undershoot or an overshoot based on the resistance alone.
If the sintering state cannot be judged, adjust the temperature of the area 8, find the approximate adjustment point, and slowly make fine adjustments. When fine-tuning, it can be judged according to the state of the background. If the backcourt expands slightly, it needs to be fine-tuned to cool down due to overheating. Before starting sintering, please confirm that each heating lamp is working properly. Check whether the lamp power of each temperature zone is higher than the average value of other temperature zone lamps to ensure the average sintering. Vacuum sintering furnace is a device that shrinks the shape of an object or substance by heating at high temperature. By reducing the voids in the object, gradually gathering the grain boundaries, and gradually connecting the solid particles, the polycrystalline sintered body equipment that improves the density and reduces the object is realized.
So how should the vapor deposition furnace be maintained at ordinary times?
1, equipment import and export warehouse, transmission warehouse to ensure clean and no garbage.
2. Clean the organic matter above with alcohol.
3. The inside of the cavity mainly checks whether the ventilation holes are blocked.
4. If the lamp has organic matter, it can be wiped and cleaned with non-woven fabric or alcohol cotton.
5. If it is a beveled mesh belt, you can transfer it to the 120 while baking it soft and then dial it out.
6. When the needle net is used, it can be polished slowly with sandpaper to prevent damage to the battery.
Vapor deposition furnace special attention:
1. The mold is generally prepared by the user, and the mold material is basically high-purity graphite, and its pressure limit is 40MPa. It is recommended that the user use it below 30MPa. Calculate the area of the upper and lower punches of the die before pressurizing and convert it into pressure. The specific formula is as follows:
Allowable pressurization of vapor deposition furnace system (ton) = upper or lower punch area 30MPa
If you do not calculate in advance the blind pressure caused by the mold, briquette, heating parts, insulation screen and other graphite products damaged, the company is not responsible.
2. The thermocouple is of tungsten rhenium type, which becomes brittle after use and cannot be contacted. Please replace it immediately when it is damaged. Its model is W2 type.
3. Pay attention to the heat preservation of circulating water in winter. Otherwise prone to water pipe rupture.
4. After use, the vapor deposition furnace body should be kept in vacuum, the insulation layer in the furnace is easy to get damp, and the next vacuum will be faster.
5, the equipment is complex, it is recommended to use, special person is responsible for, strict pre-use training for beginners, there are after-use inspection, operation and use records and other equipment use regulations.
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