Silica sol precision casting formula

The formula of silica sol for precision casting can be adjusted according to specific needs and process requirements. The following is a common silica sol formula:

1. Silica sol: 1000g

2. Pure water: 1000g

3. Ammonia: 10-20g

4. Ethanol: 50-100g

5. Ammonium nitrate: 10-20g

The specific preparation method is as follows:

1. Add silica sol to pure water and stir evenly.

2. Add appropriate amount of ammonia and adjust the pH value to 8-9.

3. Add ethanol and stir evenly.

4. Add ammonium nitrate and stir evenly.

5. Filter the solution to remove impurities.

6. Pour the solution into the container and seal it for storage.

It should be noted that the formula and preparation method of silica sol may vary due to different process requirements. It is recommended to conduct experimental verification before use. At the same time, when preparing and using silica sol, attention should be paid to safety protection measures to avoid harm to the human body and the environment.