A STUDY ON SiC SUSCEPTOR CONFIGURATION FOR MICROWAVE HYBRID HEATING

IF 0.2 Q4 MULTIDISCIPLINARY SCIENCES Suranaree Journal of Science and Technology Pub Date : 2023-12-14 DOI:10.55766/sujst-2023-05-e03043
Akawat Ngamkiatpaisan, Montree Hankoy, M. Kitiwan, N. Keawprak, P. Tunthawiroon
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Abstract

Microwave hybrid heating (MHH) is a novel method to enhance ceramic sintering at high temperatures. The heating mechanism by MHH involves two directions of heat transfer for materials: microwaves heat the sample from the inside out, while the susceptor provides conventional heating from the outside. This unique heating mechanism offers several advantages, including uniform heating, rapid sintering, and enhanced microstructure and properties of materials. This study investigates the configuration of silicon carbide (SiC) susceptors for microwave hybrid heating. The microwave oven (multi-mode, 2.45 GHz, 1.2 kW) was modified with a ceramic insulator housing to maintain the temperature in the chamber. The effects of different configurations of SiC susceptors and microwave powers on the heating rate and maximum temperature were investigated. SiC susceptor plates were placed in the microwave oven using 3 different configurations, and for each condition, the microwave power was varied at 40, 60, 80, and 100% (480, 720, 960, and 1,200 W). The temperature in the microwave chamber was recorded until it reached 900°C or after 30 min of heating. Using two plates of SiC susceptor at 100 % power resulted in the highest heating rate of 62°C/min to reach 925°C. The results of this study offer guidance for the selection of appropriate heating conditions for individual ceramic materials, which can lead to more effective sintering processes.
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用于微波混合加热的碳化硅吸附器配置研究
微波混合加热(MHH)是一种在高温下增强陶瓷烧结的新方法。MHH 的加热机制涉及材料的两个传热方向:微波从内向外加热样品,而感热体则从外向内提供传统加热。这种独特的加热机制具有多个优点,包括加热均匀、烧结迅速、材料的微观结构和性能得到改善。本研究调查了用于微波混合加热的碳化硅(SiC)感应器的配置。微波炉(多模式,2.45 GHz,1.2 kW)改装了陶瓷绝缘体外壳,以保持炉腔内的温度。研究了不同配置的碳化硅吸收体和微波功率对加热速率和最高温度的影响。使用 3 种不同的配置将碳化硅吸收板放入微波炉,每种条件下的微波功率分别为 40、60、80 和 100%(480、720、960 和 1,200 W)。微波室的温度一直记录到达到 900°C 或加热 30 分钟后。在 100 % 功率下使用两片碳化硅感热体,最高加热速度为 62°C/分钟,达到 925°C。这项研究的结果为针对各种陶瓷材料选择适当的加热条件提供了指导,从而可以提高烧结工艺的效率。
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来源期刊
Suranaree Journal of Science and Technology
Suranaree Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
0.30
自引率
50.00%
发文量
0
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