Electrical porcelain insulators — used on power transmission lines, substations, and electrical equipment — require a unique combination of properties: high mechanical strength (to support heavy conductors), high electrical resistivity (to prevent current leakage), excellent weathering resistance (decades of outdoor exposure), and precise dimensional control (to fit standardized hardware).
Application Overview
K-feldspar is the preferred flux for electrical porcelain because potassium produces a significantly more viscous glass phase than sodium at firing temperatures of 1250-1300 degrees C. This high viscosity is critical for two reasons: it prevents the heavy insulator body from slumping or distorting during firing, and it produces a dense, non-porous body with high electrical resistance. Our SY101 (High K+Na) K-feldspar is specifically suited for electrical porcelain. Its consistent chemistry ensures reliable electrical and mechanical properties batch after batch — essential for safety-critical components.
Technical Details & Formulation
Typical electrical porcelain body: 25-30% K-feldspar (SY101), 25-30% kaolin, 25-30% quartz, 10-15% ball clay..
