What are the sources of error in the reduction of silica burning?
Precipitated silica has a high porosity and is very light, and its surface contains a large number of hydroxyl groups, which is easy to absorb water.
In the ignition weight reduction experiment, the error sources mainly include: 1) When weighing, silica will absorb water; 2) Because it is easy to be blown away by the wind, affecting the weighing accuracy; 3) After burning, water will be absorbed during cooling and weighing. The third is more influential. After burning, it should be placed in a dryer for cooling. When weighing, it should be done quickly to reduce the water absorption of white carbon black.
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