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題 名 | 碳化矽粉體之合成及其微波吸收特性研究=Studies on Synthesis and Microwave Adsorption Properties of SiC Powders |
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作 者 | 張清志; 陳頤專; 黃其清; 李景民; 洪耀勳; | 書刊名 | 中正嶺學報 |
卷 期 | 39:2(A) 2010.11[民99.11] |
頁 次 | 頁205-212 |
分類號 | 440.34 |
關鍵詞 | β-碳化矽; 粉體; 微波吸收; β-SiC; Particles; Microwave-adsorbing; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究目的使用不同的原料在1450 ℃下合成製備β-碳化矽(β-SiC)粉體,合成過程以X光繞射儀(XRD)、熱重-示差分析(TG-DSC)、掃描式電子顯微鏡(SEM)來檢測分析。不同合成方式所製得的產物,其外觀型態皆不同,但具有相同的晶體結構。常溫下,厚度1.5-3.0 mm之60 % β-SiC與橡膠或矽膠之複合材料,以及厚度3.0-5.0 mm之陶瓷複合雙層吸波片的微波吸收特性,其反射損失≧10 dB;高溫下,當外層由厚度2 mm的玻璃陶瓷片結合內層厚度2 mm的碳化矽陶瓷片所組成的複合雙層吸波片表現最佳,在300-500 ℃的測量中,其最大反射損失均維持24 dB以上。 |
英文摘要 | In this study, β-silicon carbides (β-SiC) particles were prepared at 1450 ℃by using many different starting materials. The synthesis process was characterized using X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), scanning electron microscopy (SEM). All final products are crystal with β-SiC phase, but different size and particle shape were obtained by different starting materials. However, at room temperature, it was found that the 1.5-3.0-mm-thickness 60 wt% β-SiC-rubber/silicon composites and 3.0-5.0-mm-thickness two layer dielectric absorber exhibited good microwave-absorbing efficiency with low reflection losses of ≧10 dB. At high temperature, the optimized microwave absorption of two-layer absorbers was~ 24 dB and it was manufactured with 2 mm thickness outer layer and 2 mm thickness inner layer thickness for heating 300-500 C. |
本系統中英文摘要資訊取自各篇刊載內容。