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[Chemical Knowledge]：Precautions for hydrothermal synthesis

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Hydrothermal synthesis is an important chemical synthesis method, which is widely used in inorganic functional materials, nanomaterials, pharmaceuticals and chemical industry. In the process of hydrothermal synthesis experiment, the following matters need to be paid attention.

1. reaction conditions control
1. temperature control: temperature is a very important parameter in hydrothermal synthesis, and different products usually require different temperature conditions. Therefore, it is very critical to maintain the constant temperature of the reaction system, and it is usually necessary to use professional constant temperature equipment.
2. Pressure control: The reaction system of the hydrothermal synthesis method is usually sealed, so it is necessary to control the internal pressure of the reactor to avoid accidents.

2. Crystallization Control
1. Seed Selection: Selecting the right seed has an important effect on the crystallization of the product, and laboratory tests are usually required to determine the best seed selection.
2. Stirring method: Appropriate stirring during the synthesis process will be beneficial to the crystallization of the product, but too strong stirring may affect the quality of the crystal.

3. experiment operation
1. use of chemicals: usually need to use chemicals under high temperature and high pressure in the hydrothermal synthesis experiment, the operation process needs to be extremely cautious to avoid accidents.
2. Equipment cleaning: Before the experiment, it is necessary to ensure the cleanliness of the experimental equipment to avoid the influence of impurities on the experimental results.

In the hydrothermal synthesis experiment, the above points need special attention. Only by strictly controlling the reaction conditions, crystallization control and experimental operation can the success of the experiment and the quality of the product be guaranteed. It is hoped that the experimenters can take these precautions seriously to ensure the smooth progress of the experiment.

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