Abstract
Investigations were conducted to test the use of amorphous silicon nitride as a basic catalyst. Silicon nitride powders characterized by a high specific surface area were prepared by gas-phase ammonolysis of tetrachlorosilane. The Knoevenagel condensation of benzaldehyde and malonitrile served as a test reaction to characterize the catalytic properties of the materials. It was found that favorable synthesis conditions result in powders showing a stronger catalytic activity than high surface magnesium oxide. However, a disadvantage is the sensitivity of the amorphous silicon nitride against water.
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