When selecting an electric furnace for vacuum coating, multiple factors need to be considered comprehensively, including heating temperature, vacuum degree, heating elements, cooling method, control system, etc., to ensure that the electric furnace can meet specific coating process requirements. The following are specific suggestions for selecting a vacuum coating electric furnace:

Commonly used PECVD coating vacuum tube furnace (click on the image to view product details)

1. Heating temperature
The vacuum coating process has specific requirements for heating temperature, usually between 100 ℃ and 600 ℃, depending on the coating material and process. Therefore, electric stoves should have the ability to precisely control heating within this temperature range.

2. Vacuum degree
Vacuum coating needs to be carried out in a high vacuum environment to avoid the influence of gas molecules on the coating quality. Therefore, electric furnaces should have high vacuum requirements that match the vacuum coating system. Common vacuum components include rotary vane pumps, Roots pumps, molecular pumps, etc.

3. Heating element
The heating element is the core component of an electric furnace, which directly affects heating efficiency and temperature uniformity. For vacuum coating applications, common heating elements include:
Nickel chromium wire resistance heater:
Features: Simple structure, low cost, easy to bend into the desired shape, uniform heat transfer, high heating efficiency.
Applicable scenarios: Suitable for heating small and medium-sized substrates, such as cold substrate heating commonly used during metal film evaporation.
Metal heating plate:
Features: Large surface area, uniform heating, suitable for heating large-area substrates.
Applicable scenarios: In vacuum coating, for situations that require uniform heating over a large area, such as coating large-area optical or functional films.

4. Cooling method
The cooling methods of vacuum coating electric furnaces mainly include water cooling and air cooling. The water cooling method has good cooling effect and is suitable for high-power and long-term working environments; The air-cooled method has a simple structure and easy maintenance, but the cooling effect is relatively poor. The selection should be based on the power, working time, and specific requirements of the coating process of the electric furnace.

5. Control system
The control system is a key part of the electric furnace and should have functions such as monitoring, fault display, and recording to ensure the stability and safety of the process. For vacuum coating applications, the control system should also have the ability to accurately control the heating temperature, vacuum degree, and heating time to meet the needs of different coating processes.

6. Other factors
When choosing a vacuum coating electric furnace, factors such as the structure, size, installation method of the furnace body, as well as the manufacturer's reputation and after-sales service should also be considered. The structure of the furnace body should be compact and reasonable, easy to install and maintain; The size should be determined according to the specific requirements of the coating equipment; The installation method should meet the actual conditions of the production site; At the same time, choosing manufacturers with good reputation and after-sales service is also an important guarantee for ensuring the long-term stable operation of electric furnaces.

Recommendation
For vacuum coating applications, it is recommended to choose an electric furnace equipped with nickel chromium wire resistance heating. This type of electric furnace has the advantages of high heating efficiency, good temperature uniformity, simple structure, and easy maintenance, which can meet the needs of most vacuum coating processes.

CVD vacuum coating electric furnace (click on the image to view product details)

When choosing, it is recommended to cooperate with professional vacuum coating equipment manufacturers or suppliers, and conduct detailed consultation and comparison based on actual coating process requirements and budgets to ensure the selection of more suitable electric furnace equipment.Click to learn more PECVD devices! Or click on online customer service to learn more about product information!