Table 1
Main experimental drugs
| Name of agent/reagent | Specification | Manufacturer |
|---|---|---|
| Nickel powders | W-5 | Shenzhen Changxinda Shielding Material Co., LTD |
| Polyurethane (Pu) | PU2540 | Guangzhou Yuheng Environmental Protection Materials Co., LTD |
| Defoaming agent | 5020 | Jiangsu Hengyu Chemical Industry Group Co., LTD |
| Thickener | 7011 | Guangzhou Dianmu Composites Business Department |
Table 2
Main experimental instruments
| The name of the instrument | Type | The manufacturer |
|---|---|---|
| Precision electronic balance | 2004A | Shunyu Hengping Instrument Co., LTD |
| Digital fabric thickness meter | YG141D Type | Laizhou Electronic Instrument Co., LTD |
| Digital viscometer | SNB-2 Type | Shanghai Hengping Instrument Instrument Factory |
| Single-phase series motor | U400/80 Type | Shanghai Weite Motor Co., LTD |
| Coating machine | LTE-S87609 Type | Werner Mathis, Switzerland |
| High-temperature blast drying oven | DGG-9148A Type | Shanghai Aozhen Instrument Manufacturing Co., LTD |
| Vector network analyzer | ZNB40 Type | Rohde & Schwarz, Germany |
| Dielectric spectrometer | BDS50 Type | Novocontorl Gmbh, Germany |
Table 3
Technological parameters of the content of nickel powder
| Content of nickel powder (%) | Coating viscosity (mPa·s) | Coating thickness (mm) | Drying temperature (°C) | Drying time (min) |
|---|---|---|---|---|
| 0 | 30379 | 1 | 80 | 10 |
| 10 | 30379 | 1 | 80 | 10 |
| 20 | 30379 | 1 | 80 | 10 |
| 30 | 30379 | 1 | 80 | 10 |
| 40 | 30379 | 1 | 80 | 10 |
Fig. 1
Influence of the content of nickel powder on the real part of the dielectric constant for coated composites
Fig. 2
Influence of the content of nickel powder on the imaginary part of the dielectric constant for coated composites
Fig. 3
Influence of the content of the nickel powder on the loss tangent value of the dielectric constant for coated composites
Fig. 4
Influence of the content of nickel powder on the reflection loss for coated composites
Fig. 5
Influence of the content of nickel powder on the shielding effectiveness for coated composites