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| Content Provider | IET Digital Library |
|---|---|
| Author | Peddamallu, Nagachandrika Nagaraju, Guvvala Sridharan, Krishnamurth Velmurugan, Ramachandran Vasa, Nilesh Jayantilal Nakayama, Tadachika Sarathi, Ramanujam |
| Abstract | Epoxy MgO nanocomposites exhibit high surface discharge inception voltage (SDIV) in SF6 gas ambience. Increase in SDIV is observed with 3wt% of MgO-added epoxy nanocomposites, especially when the SF6 ambient gas pressure is high. Impact of thermal ageing of epoxy nanocomposites on SDIV is minimum. Dielectric response studies were carried out experimentally and compared with modelling studies. The surface potential decay and charge trap characteristics of epoxy nanocomposites vary with percentage of nano filler. Thermal aging of epoxy nanocomposites has less influence on surface potential decay characteristics for 1 and 3 wt% MgO-added epoxy nanocomposites, indicating anti-thermal aging characteristics. Surface discharge activity generates UHF with its dominant frequency at around 1 GHz. The UHF signal magnitude formed due to SD activity is minimum with 3 wt% MgO-added epoxy nanocomposites. Laser-induced breakdown spectroscopy (LIBS) studies indicate that plasma temperature and threshold fluence increases with increase in wt% of MgO in epoxy resin. Tensile and flexural properties are greatly improved for nanocomposite compared to epoxy. The dynamic mechanical analysis (DMA) indicates increased storage modulus and reduction of tan δ with epoxy nanocomposites. The glass transition temperature (Tg) and activation energy increases with wt % of nano filler. |
| Starting Page | 632 |
| Ending Page | 639 |
| Page Count | 8 |
| ISSN | 17518822 |
| Volume Number | 13 |
| e-ISSN | 17518830 |
| Issue Number | Issue 5, Jul (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-smt/13/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5514 |
| Journal | IET Science, Measurement & Technology |
| Publisher Date | 2019-02-11 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Ageing Anti-thermal Aging Characteristic Charge Trap Characteristic Elastic Constants Elastic Moduli Elasticity Elasticity And Anelasticity Electric Discharges Electrical Property Epoxy Insulation Epoxy Magnesium Oxide Nanocomposite Epoxy MgO Nanocomposite Epoxy Resin Filled Polymers Glass Transition Glass Transitions Heat And Thermomechanical Treatments Magnesium Compound Mechanical Property MgO Nanocomposite Nanofabrication NanoParticle Nanotube And Nanostructured Material Plasma Temperature Plasma Temperature And Density Resins SF6 Ambient Gas Pressure Structure of Solid Clusters Surface Discharge Activity Surface Discharge Inception Voltage Surface Discharges Surface Potential Surface Potential Decay Characteristic Thermal Ageing Thermal Property |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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