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The Effect of Various Chelating Agents on the Thermal Decomposition of Cerate-Zirconate Ceramics Powder

机译:各种螯合剂对锆陶瓷粉热分解的影响

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In this work, BaCe_(0.54)Zr_(0.36)Y_(0.1)O_(2.95) (BCZY) ceramics powder was synthesized using four types of chelating agents by a modified sol-gel method. The aim of this work is to study thermal decomposition of the sample that prepared using metal nitrate salt (M+), respective to chelating agents (C) and ethylene glycol (EG) at molar ratio of M~+:C:EG = 3:3:2. The gel obtained was heated in a furnace at 325 °C and 1100 °C, respectively to produce light-yellow powder. The thermal behavior of the dried powder (T=325 °C) was analyzed by thermogravirnetric analysis (TGA) and Fourier infrared spectroscopy (FTER). TGA results indicate that all the samples were almost completly decomposed at ~ 900 °C except for NTA that showed the lowest thermal decomposition at 580 °C. FTIR spectra illustrated that the carbonate residue still remained in the powders even after calcined at 1100 °C. It was found that the different chelating agents used lead to the different thermal characteristics of the BCZY powder.
机译:在这项工作中,使用由改性溶胶 - 凝胶法使用四种螯合剂合成Bace_(0.54)Zr_(0.36)Y_(0.1)y_(2.95)(2.95)(2.95)(Bczy)陶瓷粉末。本作作品的目的是研究使用金属硝酸盐(M +)的样品的热分解,相应于螯合剂(C)和乙二醇(例如)在M〜+:C:例如= 3的摩尔比下进行螯合剂(C)和乙二醇(例如): 3:2。得到的凝胶分别在325℃和1100℃下在炉中加热以产生浅黄色粉末。通过热重向分析(TGA)和傅立叶红外光谱(Fter)分析干粉(T = 325℃)的热行为。 TGA结果表明,除NTA外,所有样品几乎完全分解,除了在580°C下显示最低的热分解。 FTIR光谱表明,即使在1100℃下煅烧后,碳酸盐残留仍然仍然在粉末中。发现使用的不同螯合剂导致BCZY粉末的不同热特性。

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