Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites

Dhanunjaya Naidu Vangapandu; Palash Mishra; Pawel Rozga; R. Sarathi; Mithun Mondal; M. Tariq Nazir; Chillu Naresh

doi:10.1049/hve2.70190

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Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites

更新时间：2026-07-03

- Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites
- Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites
- 高电压（英文） 2026年11卷第3期
- 作者机构：
  
  1. Department of Electrical Engineering, National Institute of Technology, Warangal,India
  2. Institute of Electrical Power Engineering, Lodz University of Technology,Lodz,Poland
  3. Department of Electrical Engineering, Indian Institute of Technology,Chennai,India
  4. Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science,Hyderabad,India
  5. Institute for Sustainable Industries and Liveable Cities, Victoria University,Melbourne,Australia
  6. Department of Electrical Engineering, Vellore Institute of Technology, Amaravati,India
- 作者简介：
- 基金信息：
- DOI：10.1049/hve2.70190
  中图分类号：
- 纸质出版：2026
- 稿件说明：
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Dhanunjaya Naidu Vangapandu, Palash Mishra, Pawel Rozga, 等. Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites[J]. 高电压（英文）, 2026,11(3).

Dhanunjaya Naidu Vangapandu, Palash Mishra, Pawel Rozga, et al. Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites[J]. High Voltage, 2026, 11(3).
Dhanunjaya Naidu Vangapandu, Palash Mishra, Pawel Rozga, 等. Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites[J]. 高电压（英文）, 2026,11(3). DOI： 10.1049/hve2.70190.

Dhanunjaya Naidu Vangapandu, Palash Mishra, Pawel Rozga, et al. Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites[J]. High Voltage, 2026, 11(3). DOI： 10.1049/hve2.70190.

摘要

Room temperature vulcanised (RTV) silicone rubber

commonly used as an external insulating coating on ceramic bushings of oil-immersed transformers

undergoes significant degradation when exposed to mineral oil under harsh environmental conditions. Therefore

the present study investigates the ageing characteristics of aluminium nitride (AlN)-doped silicone rubber nanocomposites subjected to mineral oil ageing at 80°C for 200 h. Nanocomposites with 0

1 wt.%

3 wt.% and 5 wt.% AlN were fabricated. Post-ageing

Fourier transform infrared spectroscopy (FTIR) confirmed the scission of side chains and main backbone chains in the silicone rubber matrix. This degradation resulted in decreased surface hydrophobicity and shore hardness

along with increased surface roughness

as evidenced by contact angle measurements

shore hardness testing and 3-D microscopy

respectively. Surface potential measurements indicated reduced surface charge dissipation capability in the aged specimens. Additionally

inclined plane tracking and erosion (IPT-E) tests performed according to IEC 60587 revealed a significant decline in tracking and erosion resistance. Thermogravimetric analysis and IR thermography showed reduced thermal stability and increased heat accumulation in the aged samples. Overall

the 3 wt.% of AlN-doped nanocomposite demonstrated superior resistance to degradation

suggesting its potential for improved performance under mineral oil ageing conditions for transformer bushing applications.

Abstract

Room temperature vulcanised (RTV) silicone rubber

commonly used as an external insulating coating on ceramic bushings of oil-immersed transformers

undergoes significant degradation when exposed to mineral oil under harsh environmental conditions. Therefore

the present study investigates the ageing characteristics of aluminium nitride (AlN)-doped silicone rubber nanocomposites subjected to mineral oil ageing at 80°C for 200 h. Nanocomposites with 0

1 wt.%

3 wt.% and 5 wt.% AlN were fabricated. Post-ageing

along with increased surface roughness

as evidenced by contact angle measurements

shore hardness testing and 3-D microscopy

respectively. Surface potential measurements indicated reduced surface charge dissipation capability in the aged specimens. Additionally

the 3 wt.% of AlN-doped nanocomposite demonstrated superior resistance to degradation

suggesting its potential for improved performance under mineral oil ageing conditions for transformer bushing applications.

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