Improving the tracking and erosion resistance performance of alumina trihydrate-free addition-cure liquid silicone rubber

Yan, Nianping; Jia, Zhidong; Zou, Xiaobing

doi:10.1109/tdei.2018.007130

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…In the inclined plane test process, the voltage was increased to one of the test voltages list in Table 2 (i.e., 2.5, 3.5 or 4.5 kV) and applied to the standard size silicone rubber samples, and the conductive liquid was continuously and evenly dripped onto the sample surface with the purpose of generating intermittent arcing on the sample surface to simulate the ablation of the insulating material by the electric arcing. The schematic figure of the experiment setup is the same as that in [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

Chen

Wang

et al. 2019

Sensors

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Silicone rubber material is widely used in high-voltage external insulation systems due to its excellent hydrophobicity and hydrophobicity transfer performance. However, silicone rubber is a polymeric material with a poor ability to resist electrical tracking and erosion; therefore, some fillers must be added to the material for performance enhancement. The inclined plane test is a standard method used for evaluating the tracking and erosion resistance by subjecting the materials to a combination of voltage stress and contaminate droplets to produce failure. This test is time-consuming and difficult to apply in field inspection. In this paper, a new and faster way to evaluate the tracking and erosion resistance performance is proposed using laser-induced breakdown spectroscopy (LIBS). The influence of filler content on the tracking and erosion resistance performance was studied, and the filler content was characterized by thermogravimetric analysis and the LIBS technique. In this paper, the tracking and erosion resistance of silicone rubber samples was correctly classified using principal component analysis (PCA) and neural network algorithms based on LIBS spectra. The conclusions of this work are of great significance to the performance characterization of silicone rubber composite materials.

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Section: Methodsmentioning

confidence: 99%

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

Chen

Wang

et al. 2019

Sensors

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“…Among polymer materials available for encapsulation, the addition-cure liquid silicone rubber (ALSR) is an ideal encapsulation material since it has no by-product release, less heat generation, as well as small shrinkage during crosslinking. It possesses remarkable properties such as excellent electrical insulation, hydrophobicity, chemical inertness and high tolerance to various radiations, except for a low thermal conductivity (about 0.125~0.25 W (m -1 K -1 )) [11,12]. Currently, the thermal conductivity of electronic packaging polymers can be enhanced by filling high thermal conductivity and electrical insulating ceramic particles [13][14][15], such as aluminum nitride (AlN) [16], boron nitride (BN) [17], SiC [18], Si 3 N 4 [19].…”

Section: Introductionmentioning

confidence: 99%

Study on aluminum nitride/addition-cure liquid silicone rubber composite for high-voltage power encapsulation

Gao

Zhu

et al. 2021

PLoS ONE

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In view of the development direction of high power and miniaturization of high-voltage power supply, higher requirements are put forward for the breakdown strength, thermal conductivity of packaging materials for its high voltage output module. An electric-insulated heat-conducted material with aluminium nitride as heat conducting filler and addition-cure liquid silicone rubber (ALSR) as matrix for high voltage power encapsulation has been studied. Initially, the thermal conductivity and breakdown strength of composites were explored at different filler fractions. With increase of filler fraction, the thermal conductivity increased and the breakdown strength decreased. Then, with the packaging module volume as the optimization objective and the working temperature as the optimization condition, the temperature distribution of high voltage power supply was studied by using the finite element method, and 40wt% filling fraction was selected as the optimal ratio. Finally, the actual packaging experiment of the high voltage module is carried out. and the variation of the output voltage and temperature with the working time is obtained. According to the experimental results, the output voltage of the high voltage module is basically stable, and the maximum surface temperature is 40.4°C. The practicability of the electric-insulated heat-conducted material has been proved.

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“…[15] Moreover, the tracking and erosion resistance performances as well as the effect of environmental parameters of liquid silicone rubber with different fillers were also investigated extensively. [16][17][18] The addition of co-filled filler in the matrix which can combine the advantages of different fillers respectively is another effective approach to improve the overall performances of polymer. [19][20][21] Zha et al prepared silicone rubber co-filled with different volume ratios of micro-Si 3 N 4 and nano-Al 2 O 3 , they found that the thermal conductivity reached 1.6 W m −1 K −1 when the volume fraction of Si 3 N 4 was 26%, volume fraction of Al 2 O 3 is 4%.…”

Section: Introductionmentioning

confidence: 99%

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets

Feng

Zhang

Zha

et al. 2020

J of Applied Polymer Sci

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The addition‐type liquid silicone rubber (ALSR) co‐filled with spheroidal Al2O3 and flaky BN was prepared by the mechanical blending and hot press methods to enhance the thermal, electrical, and mechanical properties for industrial applications. Morphologies of ALSR composites were observed by scanning electron microscopy (SEM). It was found that the interaction and dispersion state of fillers in the ALSR matrix were improved by the introduction of BN sheets. Thermal, electrical, and mechanical performances of the ALSR composites were also investigated in this work. The result indicated that the thermal conductivity of ALSR can reach 0.64 W m−1 K−1 at the loading of 20 wt% Al2O3/20 wt% BN, which is 3.76 times higher than that of pure ALSR. The addition of Al2O3 particles and BN sheets also improve the thermal stability of ALSR composites. Moreover, pure ALSR and ALSR composites showed relatively lower dielectric permittivity (1.9–3.1) and dielectric loss factor (<0.001) at the frequency of 103 Hz. The insulation properties including volume resistivity and breakdown strength were improved by the introduction of flaky BN in the ALSR matrix. The volume resistivity and characteristic breakdown strength E0 are 6.68 × 1015 Ω m and 93 kV/mm, respectively, at the loading of 20 wt% Al2O3/20 wt% BN. In addition, the mechanical characteristics including elongation at break and tensile strength of ALSR composites were also enhanced by co‐filled fillers. The combination of these improved performances makes the co‐filled ALSR composites attractive in the field of electrical and electronic applications.

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Improving the tracking and erosion resistance performance of alumina trihydrate-free addition-cure liquid silicone rubber

Cited by 9 publications

References 42 publications

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

Study on aluminum nitride/addition-cure liquid silicone rubber composite for high-voltage power encapsulation

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets

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Improving the tracking and erosion resistance performance of alumina trihydrate-free addition-cure liquid silicone rubber

Cited by 9 publications

References 42 publications

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

A Quick Classifying Method for Tracking and Erosion Resistance of HTV Silicone Rubber Material via Laser-Induced Breakdown Spectroscopy

Study on aluminum nitride/addition-cure liquid silicone rubber composite for high-voltage power encapsulation

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al2O3 particles and BN sheets

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Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets