(西安理工大學 材料科學與工程學院，西安 710048)
摘 要: 利用掃描電鏡對凹印用銅金粉的物理性能進行了研究，考察了銅金粉的微觀形貌、粒度分布、厚度及在黏結(jié)料中的排列行為。結(jié)果表明，進口銅金粉的粒度分布均勻，表面干凈；國產(chǎn)銅金粉粒度極差大，細小顆粒所占比例過多，從而影響了國產(chǎn)銅金粉的印金光澤度。進口銅金粉的厚度在0.1μm左右，徑厚比約為50；國產(chǎn)銅金粉的厚度在0.1～0.3μm之間，徑厚比約為40。銅金粉的片越薄，水面遮蓋率越大。銅金粉在黏結(jié)料中形成與紙面平行的方向定向排列，銅金粉的這種排列行為與其光學性能密切相關(guān)。
關(guān)鍵字: 銅金粉；粒度分布；厚度；定向排列
intaglio printing
（College of Materials Science and Engineering，
Xi′an University of Technology， Xi′an 710048，China）
Abstract:SEM was used to study physical properties of bronze powder in intaglio printing. Its microphotograph，size distribution，thickness and behavior in oil ink were mainly investigated. The results indicate that the imported bronze powder whose surface is clean has the narrow distributions of particle size. The domestic particles with wide size distribution contain a large proportion of too small powders， which reduce its metallic gloss. The thickness of imported products is about 0.1μm and the radio of diameter to thickness is 50，but the thickness of national ones ranges from 0.1 to 0.3μm and the radio of national ones is 40. The thinner the flakes are，the more excellent water surface covering power is. Dire ctional arrangement of bronze powder in printing ink was observed，which has a impaction on optical property.
Key words: bronze powder；size distribution；thickness；directional arrangement
