Small vacuum evaporation instrument is a commonly used experimental instrument, which can evaporate samples under vacuum conditions, and is widely used in research and production in materials science, physics, chemistry and other fields. This article will introduce the working principle, structure, usage method and precautions of small vacuum evaporation instrument to help readers better understand and use this instrument.
First, the working principle.
The main working principle of a small vacuum evaporator is to heat and evaporate the coating material so that its atoms or molecules are released from the surface and deposited on the surface of the sample to form a thin film. The instrument is mainly composed of a vacuum chamber, a heating evaporation source, a sample holder and a control system.
Second, the structure. 1.Vacuum chamber: The vacuum chamber is the core part of the whole instrument, it is a closed container used to maintain the vacuum state inside.
2.Heating evaporation source: A heating evaporation source is a component used to heat a coating material to evaporate. It usually consists of a heating wire or a heating block, which can be selected and adjusted according to different needs.
3.Sample holder: The sample holder is a part used to place the sample, it is usually made of a metal material that is resistant to high temperatures, and can carry a certain weight of the sample.
4.Control system: A control system is a component used to control the workflow and parameters of the entire instrument. It usually consists of a circuit board, a control panel, and sensors, among other things.
3. How to use.
1.Preparation: Before using a small vacuum evaporator, you need to prepare the coating material, sample, and experimental environment. The coating material should be of high purity and good stability, the sample should be representative, and the experimental environment should be kept clean and tidy.
2.Boot operation: connect the instrument and the power supply according to the requirements of the manual, turn on the instrument switch, and enter the control system interface. Select the heating evaporation source and sample holder as needed, and set various parameters, such as temperature, vacuum, etc.
3.Experimental operation: Place the sample on the sample holder, put the sample holder into the vacuum chamber, and close the vacuum chamber door. The instrument was started for heating and evaporation treatment, and the experimental process was observed and controlled. During the experiment, it is necessary to observe the appearance changes of the sample and the working status of the instrument, adjust the parameters and deal with abnormal situations in time.
4.Post-experimental processing: At the end of the experiment, the sample is removed for follow-up observation and analysis. At the same time, the instrument needs to be cleaned and maintained to ensure its good working condition and service life.
4. Precautions.
1.When using a small vacuum evaporation instrument, it is necessary to pay attention to safety issues, such as not touching high-temperature parts and electrical parts, and not opening the vacuum chamber door at will when the instrument is working.
2.It is necessary to select the appropriate coating material and heating evaporation source according to different samples and experimental needs, and set various parameters.
3.During the experiment, it is necessary to keep the sample clean and dry to avoid contamination and oxidation.
4.When using the instrument, it is necessary to comply with the relevant laboratory regulations and operating procedures to ensure the accuracy and safety of the experiment.
5.After the experiment, the instrument needs to be cleaned and maintained to ensure its good working condition and service life.
In a word, the small vacuum evaporation instrument is a commonly used experimental instrument, which can evaporate samples under vacuum conditions, and is widely used in research and production in various fields. When using this instrument, it is necessary to pay attention to safety issues, select the appropriate coating material and heat the evaporation source, keep the sample clean and dry, and comply with the relevant laboratory regulations and operating procedures. Only in this way can we better play the role and application value of small vacuum evaporation instrument.