DC resistance and insulation resistanceThe purpose of measuring DC resistance is to check the quality of the windings or coils of electrical equipment and the integrity of the circuit to find the wire breakage, joint welding, poor contact,…

1.Variable inductance coil is used to adjust the inductance, to change the resonance frequency or the tightness of the circuit coupling. Typically, the four methods are used for winding: 1 ) Inserting the core and the copper core in the on…

Sulfide, sulfur oxides and yttrium oxide systems The base cations of sulphide red phosphors are mainly alkalic metals, which have been applied to a certain extent on white LED. The activator ion of this kind of phosphor is EU, because the …

spray pyrolysisIn recent years, various inorganic functional materials were prepared by spray pyrolysisThe favor of the researchers. The basic principle of spray pyrolysis is that the raw materials are first mixed with solvents (such as wa…

Combustion method The combustion method is to add appropriate amount of water and combusting agents, such as urea, to the raw materials of phosphors. gas pressure sensor When the mixture of stoichiometric components is completely dissolved…

precipitation method Preparation of phosphors by precipitation is a method of precipitating solutes from homogeneous solutions to synthesize phosphors. Coprecipitation is a method for preparing phosphor powder by precipitating a variety of…