Production of nitride and carbonitride powders from inorganic azides by self-propagating high-temperature synthesis

Combustion synthesis of boron nitride via magnesium reduction using additives

“…As the NH 4 X content further increases (40.1), the decrease of temperature becomes the dominant factor, thus causing a decrease in the product yield. This phenomenon was named as catalytic effect in many previous studies [28,31,34] and similar to many other studies [23,28,[38][39][40], NH 4 Cl was found to be more effective as a catalytic agent than NH 4 Br (for nitridation of many metals).…”

“…(Note that the product yield is 10% when no additive is added.) In many studies on the combustion synthesis of nitrides [31][32][33][34], NaN 3 or C 3 H 6 N 6 was often added as a solid-state nitrogen source to increase the product yield. In these studies, the reactant powders were usually pressed into compacts (will be referred to as pressing conditions).…”

Combustion synthesis of Si3N4 powder

“…As reported by Amosov et al, 15 the addition of halide salts to the reactants could increase the degree of product conversion. As reported by Amosov et al, 15 the addition of halide salts to the reactants could increase the degree of product conversion.…”

“…Amosov et al 15 studied the combustion synthesis of nitride powders by using azides as reagents and found that the addition of halide salts could increase the degree of conversion. They suggested that the halogenides (formed during the combustion reaction) catalyzed the nitridation of metal elements, thus creating the effect.…”

“…9 It has many potential advantages such as low processing cost, energy-efficiency, and high production rate. [11][12][13] Recently, several other investigators 14,15 demonstrated that use of a solid-state nitrogen source (i.e., metal azides) can significantly decrease the N 2 pressure required for the synthesis of many nitride ceramic powders. A high pressure of N 2 gas is thus favorable to achieve high conversions when using N 2 gas as the nitrogen source.…”