利用蛇紋石萃取物與碳粉合成碳化矽之研究

Synthesis of Silicon Carbide from Serpentine Extract and Carbon Powder

林鈺婷(Yu-Ting Lin)

指導教授 ： 張裕煦

國立臺北科技大學/工程學院/資源工程研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00289

摘要

蛇紋石廢料來源為石材開採、加工過程中產生大量下腳料及污泥，目前絕大部分的廢料均未能有效利用，形成礦產資源的浪費。故本研究目標為從蛇紋石中提取非晶質二氧化矽，即以蛇紋石未經任何處理、經磁選、經酸萃及先經磁選再酸萃之粉末，作為合成碳化矽之矽來源，以碳熱還原法在高溫下與活性碳、碳黑或石墨廢料反應，以 XRD 鑑定晶相確認合成出 β-SiC 晶體粉體，以 SEM 觀察表面形貌，由 ICP-AES 測量碳化矽純度，得到製程的最佳參數。探討不同的富矽粉末、碳粉種類、莫耳比、反應溫度、持溫時間與後處理對合成碳化矽的影響。

關鍵字

蛇紋石 ； 碳化矽 ； 碳熱還原法

並列摘要

The sources of serpentine wastes are tailings and large amounts of sludge are produced from stone mining and process. Most of the wastes currently are not effectively reused and also creates a waste of mineral resources. The purpose of this study is to extract amorphous silica from serpentine as silica precursor for high temperature synthesis of silicon carbide by carbothermal reduction with activated carbon, carbon black or waste graphite as the carbon sources. Formation of β type SiC was confirmed by XRD. The surface morphology was observed by SEM, and the purity of silicon carbide was measured by ICP-AES. The whole process is controlled by different enriched silica powders, type of carbon, molar ratio, reaction temperature, reaction time and post-processing for the synthesis of silicon carbide.

並列關鍵字

serpentine ； silicon carbide ； carbothermal reduction

參考文獻

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