| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 822782 | Composites Science and Technology | 2007 | 5 Pages |
In this study, chemical plating method was used to prepare silver coated carbon nanotubes (SCCNT). Fundamental materials characterizations including X-ray diffraction and transmission electro microscopy (TEM) were conducted on these nanotubes. Two kinds of isotropical conductive adhesives (ICA) were developed by using multi-walled carbon nanotubes (CNT), SCCNT as conductive fillers, respectively. The electrical, mechanical and aging properties of above ICAs were investigated and compared with that of conventional ICA filled with 1 μm average-sized Ag particles. The results indicated that the percolation threshold of bulk resistivity reaches 2.4 × 10−3 Ω cm for ICA filled with 31% CNT and the shear strength reaches the maximum value for ICA filled with 23% CNT. At the same filler volume content of 28%, the ICAs filled with SCCNT shows the lowest conductive resistivity of 2.2 × 10−4 Ω cm and the ICAs filled with both CNT and SCCNT exhibit higher shear strength (19.6 MPa). The testing results of aging properties under conditions of 85 °C, RH85% for 1000 h showed that the shifts of both bulk resistivity and shear strength did not exceed 15% for the ICAs filled with both CNT and SCCNT, while the shifts of conductive resistivity and shear strength were 200% and 35%, respectively, for ICA filled with micro-sized Ag particles.
