无机填充剂对可陶的电气和机械性能的影响
Mingyuan Yang1, Jingqi Qiao1, Bolin Su2
1State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China.
Polymers
|June 27, 2024
概括
这项研究开发了一种可陶化 (CSR),在950°C时转化为阻燃陶,非常适合用于耐火电缆. 优化的填充比率在得到的陶中产生了出色的电绝缘和机械强度.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 陶工程 陶工程 陶工程
背景情况:
- 陶可塑 (CSR) 通过在高温下转化为陶,提供阻燃性.
- 传统的CSR需要在1000°C以上烧结,超过电缆中的铜导体点.
- 降低陶化温度对于耐火电缆的实际应用至关重要.
研究的目的:
- 将CSR的陶化温度降低到950°C.
- 调查火山化和填料成分对CSR特性的影响.
- 评估开发的CSR及其陶形式的电气和机械性能.
主要方法:
- 通过调整火山化过程和无机填充剂比率 (wollastonite和muscovite) 来优化CSR配方.
- 在120°C和150°C采用两步火山化技术.
- CSR和陶样品的特征电性能 (直流电阻,介电常数,介电损耗) 和机械强度 (三点曲).
主要成果:
- 成功制造了CSR,其低化温度为950°C.
- 含有高石含量的CSR表现出极好的电性能:6.713 × 1014 Ω·cm直流电阻,4.3介电常数和0.025介电损耗.
- 由此产生的陶呈现出密集的微观结构,高体积电阻 (8.69 × 10 11 Ω·cm),低介电损耗 (0.01),以及显著的机械强度 (110.03 MPa).
结论:
- 该研究成功开发了一种适用于耐火电缆应用的低温陶可性 (CSR).
- 优化的填充比率,特别是高石含量,是实现优越电绝缘和机械性能的关键.
- 开发的CSR为生产具有增强安全功能的先进耐火材料提供了可行的途径.
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