Combustion method
Combustion method
The combustion method is to add appropriate amount of water and combusting agents, such as urea, to the raw materials of phosphors.
When the mixture of stoichiometric components is completely dissolved, it is heated in an electric furnace, and the mixture begins to burn when the burning point of the burning agent is reached in a day. Burning over. Reaction over. The combustion process of phosphor synthesized by combustion method can be divided into two forms: self propagating and flaming. Self-Propagation is when the reactant starts at one end and gradually travels automatically to the other until the reaction terminates. An explosion is the immediate occurrence of the entire reaction, releasing a large amount of heat, and the reaction is as intense as an explosion. The synthesis of phosphors by combustion method can reduce the heating temperature of the electric furnace and reduce the energy consumption. On the other hand, the gases produced by the combustion process can protect the easily oxidized ions. Therefore, it is not necessary to use the other reductive protective atmosphere during the reaction, thus reducing the cost. The shortcoming of combustion method is that there may be heterogenous phase in the process of preparing phosphors, so the final product purity is not high, which leads to the degradation of phosphor luminescence performance.
This article is from allicdata
