| abstract |
The invention discloses a direct current cable insulating material, comprising the following components in parts by weight: 100 parts of a base material, 6-15 parts of nano-scale glass powder, 0.1-0.2 parts of a liquid antioxidant, and 1-1.5 parts of a cross-linking agent The base material is low-density polyethylene, and the nano-scale glass powder is surface-treated with an amphiphilic molecule octadecenoic acid polyethylene glycol monoester. The DC cable insulating material provided by the invention has excellent DC electrical properties, especially at high temperature, including effectively inhibiting the injection and accumulation of space charges in the insulating material, reducing the sensitivity of the volume resistivity of the insulating material to temperature, extremely It greatly improves the DC withstand voltage level of insulating materials at high temperatures. |