TY - JOUR ID - 69993 TI - Effect of Milling Time and Microwave Sintering on Microhardness and Electrical Properties of Nano and Micro Structured Cordierite JO - Advanced Ceramics Progress JA - ACP LA - en SN - 2423-7477 AU - Kiani, Marzieh AU - Ebadzadeh, Touraj AD - Department of Ceramic, Materials and Energy Research Center, Karaj, Iran Y1 - 2015 PY - 2015 VL - 1 IS - 1 SP - 1 EP - 5 KW - Microwave sintering KW - Mechanical activation KW - Dielectric Constant KW - bending strength KW - Cordierite DO - 10.30501/acp.2015.69993 N2 - The purpose of this research is to investigate the mechanical and electrical properties of nano structured cordierite. Nano grain size powders were synthesized through mechanical activation by high-energy ball milling of the starting powders containing 34.86 wt% Al2O3, 51.36 wt% SiO2, and 13.78 wt% MgO. Samples were prepared by conventional and microwave sintering at 1390°C. SEM observations illustrated the equiaxed nano-grains of cordierite with an average grain size of 40 nm for samples sintered in microwave. With the increase of milling time, samples sintered at 1390°C in microwave furnace obtained higher micro-hardness and density than those sintered at the same temperature in conventional furnace. Sample milled for 30 h and sintered in microwave furnace at 1390°C obtained the maximum dielectric constant of 5.5±0.1. UR - https://www.acerp.ir/article_69993.html L1 - https://www.acerp.ir/article_69993_22b90c58299d7ee0aa6409f6b445dfac.pdf ER -