無線射頻辨識(RFID)技術近來受到許多產業的重視，其中成本因素是影響普及化的關鍵。本實驗利用低成本的鎳粉、銀包鎳粉及廣泛使用但價格較高的銀粉作為填充物，並以水性乳膠為黏結劑，製作出不同填充比的導電油墨。將上述導電油墨與銅導體比較電阻、天線阻抗、天線效率等特性。結果顯示銀基及銀包鎳基油墨的性能接近銅導體。而不同填充比的鎳基油墨之間有明顯差異。超越鎳基油墨的臨體積分率後，持續地增加鎳粉填充比，其導電性能並無大幅改善，但可利於天線效率提升，且作為RFID天線材料時，有助於讀取性能提升。然而鎳基油墨天線效率仍未達到銀基油墨的水平，需要尋求其它方法以更接近銀基油墨的性能。銀包鎳基油墨在各項測試中與銀基油保持同等級表現，是一項降低油墨成本的有潛力材料。

The potential of RFID technology is gaining widespread attentions. The cost of RFID tag becomes a key factor in practical applications. The low cost nickel powder, silver-coated nickel powder and the commonly used but expensive silver powder were mixed with an environmentally friendly water-born emulsion for the preparation of various inks. The electrical conductivity, antenna impedance, and radiation efficiency of the fabricated inks were compared with copper foil. The results indicated that the electrical conductivities of silver and silver-coated nickel-based inks were relatively close to that of copper foil, and the differences in antenna performances were only marginal. The efficiency of antenna made using the nickel-based inks was enhanced by increasing the volume fraction of nickel powder in the nickel-based inks. Above the critical volume fraction, the electrical conductivity of the nickel-based inks could not while the antenna performances could be improved by the increase in the volume fraction of the nickel powder. However, the antennas made using the nickel-based inks were still inferior to those made using the silver-based inks, and, to new antenna design is required for the nickel-based inks should the antenna performances be improved. Generally speaking, the silver-coated nickel-based inks performed as good as the silver-based inks in each testing, which makes it an attractive low cost alternative material to silver-based inks for RFID tag antenna.

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