(1. 河南城建學院 市政與環(huán)境工程學院，平頂山 467036；
2. 華中科技大學 環(huán)境科學與工程學院，武漢 430074)
摘 要: 借助熱天平與紅外光譜儀聯(lián)用儀、X射線衍射儀、掃描電鏡分析手段研究檸檬酸鉛Pb3(C6H5O7)2·3H2O的熱分解過程和產(chǎn)物。結(jié)果表明：檸檬酸鉛Pb3(C6H5O7)2·3H2O的熱分解過程分水分脫除、無水物分解和燃燒3個階段；結(jié)晶水在無水物分解階段散失，溫度達到100~200 ℃時產(chǎn)生部分有機物，超過此溫度時產(chǎn)物主要是CO2，最終產(chǎn)物為氧化鉛與金屬鉛；檸檬酸鉛在空氣中分解受焙燒溫度影響較為顯著，檸檬酸鉛前驅(qū)物Pb3(C6H5O7)2·3H2O低溫焙燒時產(chǎn)物的主要成分是α-PbO、β-PbO與金屬鉛，高溫焙燒時產(chǎn)物主要成分是β-PbO。
關(guān)鍵字: 檸檬酸鉛；熱分解；機理；鉛膏中間產(chǎn)物
（1. College of Municipal and Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China;
2. College of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China）
Abstract:Thermal decomposition behavior and product were systematically investigated by TG-FTIR, XRD, SEM analysis. The results show that the thermal decomposition process of lead citrate is divided into dewatering, organic constituent decomposition and burning stages. The dehydrating crystal water occurs in the initial decomposition followed by the generation of intermediate organic matters at 100-200 ℃. Subsequently, the ultimate gas and solid products from this decomposition process are CO2 and a mixture mainly containing PbO and Pb, respectively. The major products of Pb3(C6H5O7)2？3H2O at relatively low temperature are α-PbO, β-PbO and Pb, whereas, β-PbO is the dominant product at relatively higher temperature.
Key words: lead citrate; thermal decomposition; mechanism; lead paste
