Extensive study of the optical, mechanical properties, and gamma photon shielding effectiveness of potassium titanate biso-phosphate glasses

In order to overcome the various defects caused by the limitations of solid metal as a shielding material, the development of electromagnetic shielding materials with flexibility and excellent mechanical properties is of great significance for the next generation of intelligent electronic devices. Here, the aramid nanofiber/Ti3C2Tx MXene (ANF/MXene) composite films with multilayer structure were successfully prepared through a simple alternate vacuum-assisted filtration (AVAF) process. With the intervention of the ANF layer, the multilayer-structure film exhibits excellent mechanical properties. The ANF2/MXene1 composite film exhibits a tensile strength of 177.7 MPa and a breaking strain of 12.6%. In addition, the ANF5/MXene4 composite film with a thickness of only 30 μm exhibits an electromagnetic interference (EMI) shielding efficiency of 37.5 dB and a high EMI-specific shielding effectiveness value accounting for thickness (SSE/t) of 4718 dB·cm2 g−1. Moreover, the composite film was excellent in heat-insulation performance and in avoiding light-to-heat conversion. No burning sensation was produced on the surface of the film with a thickness of only 100 μm at a high temperature of 130 °C. Furthermore, the surface of the film was only mild when touched under simulated sunlight. Therefore, our multilayer-structure film has potential significance in practical applications such as next-generation smart electronic equipment, communications, and military applications.

Download Full-text

Flexible, conductive, porous, fibrillar polymer–gold nanocomposites with enhanced electromagnetic interference shielding and mechanical properties

Journal of Materials Chemistry C ◽

10.1039/c6tc04780g ◽

2017 ◽

Vol 5 (5) ◽

pp. 1095-1105 ◽

Cited By ~ 63

Author(s):

Jun Li ◽

Hu Liu ◽

Jiang Guo ◽

Zhen Hu ◽

Zhijiang Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Gold Nanoparticles ◽

Self Assembly ◽

Electromagnetic Interference ◽

Shielding Effectiveness ◽

Emi Shielding ◽

Electromagnetic Interference Shielding ◽

Emi Shielding Effectiveness ◽

Conductive Nanocomposites ◽

Gold Nanocomposites

Flexible lightweight conductive nanocomposites prepared by self-assembly of gold nanoparticles on charged polymer nanofibers show enhanced EMI shielding effectiveness and mechanical properties.

Download Full-text

Electromagnetic Shielding Boards Produced with Tetra Paks Waste & Metal Fibers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.3349 ◽

2012 ◽

Vol 518-523 ◽

pp. 3349-3357 ◽

Cited By ~ 2

Author(s):

Chang Yan Xu ◽

Jie Liu ◽

Xu Dong Zhu

Keyword(s):

Mechanical Properties ◽

Volume Resistivity ◽

Electromagnetic Shielding ◽

Shielding Effectiveness ◽

Fiber Layer ◽

Composite Board ◽

Food And Beverage ◽

Alternative Material ◽

Interior Finish ◽

Beverage Packaging

Just like other paper/plastic/aluminum (PPA) composites, Tetra Pak-package-material (Tetra Paks) has excellent water and vapor barrier abilities, and is widely used in food and beverage packaging industry. However, serious environmental problem follows due to its long service life. In this paper, a novel electromagnetic shielding composite board was developed with recycled Tetra Paks and copper-iron mixed fibers. The influence of Cu/Fe ratio and mat configuration on board shielding effectiveness (SE), volume resistivity (VR) and mechanical properties were investigated. The results showed that the boards with copper-iron mixed fiber layers showed better electromagnetic shielding performance than those with only iron or copper fiber layer. The SE of the boards was improved with higher copper fiber content. The location of the metal fiber layers in the mat had a significant influence on board electromagnetic shielding performance. A symmetrical sandwich structure was found beneficial to better shielding performance, and in the same condition of wave frequency and shielding material thickness, the shielding system with a Fe core exhibited better shielding performance than that with a Cu core. The ratio of Cu/Fe and the configuration of mat both had significant influences on mechanical properties of the boards. It can be concluded that qualified electromagnetic shielding composite board could be produced with Tetra Paks wastes and copper-iron mixed fibers. Showing both environmental and economic values, this type of board could be considered as an alternative material used in packaging, interior finish, furniture, and other applications.

Download Full-text

Mechanical Properties and Microstructure of Oil Well Cement Stone Reinforced with Potassium Titanate Whiskers

Springer Proceedings in Energy - Advances in Energy and Environmental Materials ◽

10.1007/978-981-13-0158-2_43 ◽

2018 ◽

pp. 405-410

Author(s):

Jiaming Yu ◽

Ming Li ◽

Xihui Hu ◽

Jianhua Guo ◽

Quan Cao

Keyword(s):

Mechanical Properties ◽

Cement Stone ◽

Oil Well ◽

Potassium Titanate ◽

Oil Well Cement ◽

Well Cement

Download Full-text

Analysis of shielding effectiveness and mechanical properties of metal matrix composite AL6061 reinforced with Al2O3 and fly ash for oblique incidence of EM wave

International Journal of Intelligent Computing and Cybernetics ◽

10.1108/ijicc-01-2021-0014 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Srinu Budumuru ◽

Satya Anuradha Mosa

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Metal Matrix Composite ◽

Matrix Composite ◽

High Intensity ◽

Metal Matrix ◽

Oblique Incidence ◽

Shielding Effectiveness ◽

Content Type ◽

Aircraft System

PurposeFiber-reinforced polymers (FRP) contain critical electrical conductivity for high-intensity radiated fields such as lightning strike susceptibility, electromagnetic energy from radar, airborne radio frequency transmitter. To provide high-intensity radiated field protection (HIRFP) for the electric and electronic aircraft system and defied the EMI effect on it, metal matrix composite was conquered. To provide the dynamic ever-increasing requirement of industries, it is necessary that Al6061 metal matrix composite assisted with AL2O3 and fly ash is used to construct the aircraft to provide HIRFP. The thickness of the material can be maintained as low as possible to use it as a coating material for the aircraft surface. X-band for oblique incidence is used to measure electromagnetic and mechanical safeguarding properties of composites.Design/methodology/approachDay by day, the applications of aerospace are becoming digital and automated. Proper shielding techniques are required to operate digital electronic devices without electromagnetic interference. It leads to a rapid rise in temperature, thermal ablation, delamination, and adverse effects on the electric and electronic aircraft system. Fly ash, a metal matrix material composite AL6061 with different percentages of reinforcement of Al2O3, was contemplated and experimented with for mechanical properties like tensile strength, density and hardness.FindingsThe obtained results compared with adjusted values and an improvement of 0.19, 0.18, 0.14 g/cm3 for density of MMC-1, MMC-2, MMC-3.31, 11 MPa for tensile strength of MMC-1, MMC-2. 24, 27, 23 BHN for hardness of MMC-1, MMC-2, MMC-3. With regard to the shielding effectiveness the results compared with adjusted values and obtained 11.36, 14.56, 19.47 dB better value than it. According to the above results, fabricated MMC’s provide superior results for a defined application like HIRFP(Surface material of aircraft).Practical implicationsIt can be used to protect electronic devices under a high-intensity radiated field, mainly in aircraft design to protect from lightning effect.Originality/valueFor a better approximation of the signal toward the practical case, the oblique incidence was considered with a different combination of Al2O3 and fly ash, reinforced to pure AL6061 to get better shielding and mechanical properties.

Download Full-text