bulk powder meaning in English

粉状炸药
散装炸药
整装粉剂

3 . the luminescence intensity of annealed nanoparticles was compared with that of the commercial bulk powders
3系统的比较了退火处理后zns纳米晶和商用荧光粉的光致发光强度。
The result shows that the emission of the former is far weaker than that of the latter . in addition , a emission band centered at 520nm was observed in all the annealed nanoparticles while it did not appear all the time in the commercial bulk powders
经过退火处理后，纳米晶样品发射光谱中出现了中心位于520nm的发射带，而这一发射带在经过相同退火处理得到的商用荧光粉样品中始终没有出现，我们探讨了其起源。