In actual production, it is usually necessary to focus on testing several characteristics that directly affect product performance。For nitride ceramics, the large specific surface area of the raw material powder used during the sintering process is beneficial for the self-diffusion of the α-phase powder, promoting the rearrangement and dissolution of α-phase particles. This is conducive to the transformation of the nitride powder from the low-temperature stable α-phase to the high-temperature stable β-phase, thereby generating a dense and uniform microstructure of electronic grade ceramics。Obviously, the importance of the specific surface area index of nitride ceramic raw powders to the quality of the final product is self-evident.