Abstract
In order to expand the range of pot materials for induction cookers, a kind of sandwich structural composite ceramic panel that consists of an Al2O3 ceramic substrate, magnetic heating interlayer, and ZrO2 ceramic substrate was developed by combining the tape casting process and the screen printing process. In this research, the slurry composition of the functional phase, glass powder, and organic carrier was optimized for preparing the heating interlayer with excellent electromagnetic properties. The influences of the glass powder content and the magnetic layer structure on the thermal shock resistance of the composite ceramic panel were studied. The finite element model of the composite ceramic panel under thermal load was established through ANSYS software. In the range of 0.1–0.3 mm thickness of a magnetic heating interlayer, the temperature field and the macroscopic stress field of the composite ceramic panel were simulated, and the influence of the magnetic layer structure on the thermal stress distribution of the composite ceramic panel was analyzed. The experimental results showed that the magnetic layer had the best quality when the amount of glass powder added was 9 wt%. The ANSYS simulation revealed that the gradient structure of the magnetic layer could reduce the stress between the alumina layer and the magnetic layer from 308 to 192 MPa, which significantly improved the thermal shock resistance of the composite ceramic panel. Therefore, the gradient structure of the magnetic layer could ensure the stability of the composite ceramic panel after five cycles of electromagnetic heating.
Highlights
Ceramics have been used as a material in pots for many years
In order to ensure the stability quality of the composite ceramic panels during the electromagnetic heating process and to avoid too large a stress mutation causing the panel to crack, the model of an alumina–magnetic material–zirconia sandwich structure was established by ANSYS software
When the thermal stress exceeded the tensile strength of the alumina substrate, the magnetic layer was tightly combined with the ceramic substrate due to the presence of the glass phase, and the composite ceramic panel was prone to expansion and cracking
Summary
Ceramics have been used as a material in pots for many years. Nowadays, China has the world’s largest ceramic pot production base. If a ceramic pot could be combined with electromagnetic induction technology, could it improve the heating efficiency of the ceramic pot but it could maintain the taste of the food itself, which conforms to modern people’s dietary concept of health, nutrition, and environmental protection. Proposed a numerical method methodology to investigate the behavior of composite sandwich structures under static and dynamic loading conditions. It could correctly simulate interfacial crack onset, layer kinematic, and debonding propagation. Based on 3D FEM (Finite Element Method), Xue et al [11] simulated the thermal-structural response of complicated sandwich composites. The micromorphology and thermal shock resistance behavior of the panel under different conditions were investigated
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