摘要
采用红外光谱技术(IR)和X射线分析(XRD)两种方法研究了固相反应法制备Sm2Zr2O7陶瓷材料过程中的阳离子扩散先后顺序。结果表明:在900℃～1000℃之间,Sm2O3与ZrO2开始发生固溶反应,Sm3+首先进入ZrO2晶格并取代Zr4+的位置,二者由于化合价存在差别,为满足晶格局部电中性的要求而引入了氧空位,两种方法分析结果完全一致。
The diffuse sequence of cations in preparing for Sm2Zr2O7 ceramic by solid reaction was studied using infrared spectra（IR） technique and X-ray diffraction（XRD） method.Results show that samarium oxides and zirconia begin to solid solution reaction in the temperature range between 900℃ and 1000℃.Sm3＋ cation firstly diffuses into ZrO2 crystal lattice and the location of Zr4＋ cation is substituted.Because of the difference in valence between Sm3＋ cation and Zr4＋ cation,the oxide vacancies are incorporated to maintain the electroneutrality of local crystal lattice.A complete same result is obtained by infrared spectra technique and X-ray diffraction method.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2010年第9期11-13,共3页
China Ceramics
关键词
热障涂层
离子扩散
固相反应
取代
thermal barrier coating
ion diffusion
solid reaction
substituting
