随着热处理温度增加，粉末中U₂N₃相衍射峰的强度逐渐下降，UN相衍射峰的强度逐渐增强。经1300℃热处理1h后，粉末中的U₂N₃相完全消失，说明为了获得UN粉体，U₂N₃粉体热处理的最佳温度为1300℃，热处理时间为1h。

With the increase of heat treatment, the intensity of U₂N₃ phase diffraction peak decreases, and the intensity of UN phase diffraction peak increases. When the U₂N₃ powder after heat treatment at 1300℃ for 1 h, the U₂N₃ phase in the powder disappeared completely. To obtain the UN powder, these results indicated that the optimal heat treatment was 1300℃, and the optimal heat treatment time was 1h.