Phase change thermal storage ceramic and preparation method thereof

US12225836B2 · kind B2 · utility

Assignee

• WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

• Meijie Zhang · 安丰镇, CN
• Cangjuan Han · Shanghai, CN
• Huazhi Gu · 红钢城街道, CN
• Ao Huang · 红钢城街道, CN
• Lvping Fu · 红钢城街道, CN

Key dates

• Filing date: Feb 4, 2021
• Grant date: Feb 11, 2025
• Expiry date: Dec 16, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The disclosure relates to a phase change thermal storage ceramic having high service temperature and improved utilization rate and utilization efficiency of heat. It is prepared at a low cost with a simple, easy-to-industrially-realized method. A mixture is obtained by mixing and stirring evenly 50-85 wt % of fused mullite powder, 10-45 wt % of pretreated aluminum-silicon alloy powder, and 3-8 wt % of ball clay. A ceramic body is formed by press molding the mixture at 80-150 MPa. The ceramic body is cured at 25-28° C. and a relative humidity of 70-75 RH for 24-36 h, dried at 80-120° C. for 24-36 h, and held at 1,100-1,300° C. for 3-5 h to prepare the phase change thermal storage ceramic. The pretreated aluminum-silicon alloy powder is prepared by holding aluminum-silicon alloy powder in water vapor at 0.02-0.20 MPa for 0.5-3 h to impregnate in an alkaline silica sol and drying the impregnated powder.