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OALib Journal期刊
ISSN: 2333-9721
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蜂窝堇青石陶瓷负载的CaZr_4P_6O_(24)涂层的制备及表征
Abstract:
采用溶胶-凝胶法制备了化学组成为CaZr4P6O24(CZP)的溶胶态前驱物,用其涂覆薄壁蜂窝堇青石陶瓷,经过700℃焙烧2h转化为具有低热膨胀特性的结晶态CZP涂层。用X射线衍射和BET(Brunauer-Emmett-Teller)氮吸附法表征了涂层的物相和孔结构,用扫描电镜观察了涂层表面及涂层与基体的界面结合处的形貌,用能量色散光谱仪分析了涂层中的元素分布及含量。结果表明在蜂窝堇青石陶瓷基体上形成的涂层组成为CZP;表面沉积了19.5%(质量分数)CZP的蜂窝堇青石陶瓷的BET比表面积、孔体积和平均孔径分别为16.4m2/g,0.0225mL/g和2.74nm。CZP涂层与蜂窝堇青石基体的界面结合良好。发动机台架性能试验结果表明"CZP-蜂窝堇青石"复合载体负载的单钯催化剂表现出与"γ-Al2O3-蜂窝堇青石"负载的单钯催化剂相近的三效转化活性。
| [1] | 周学良,秦永宁,马智,等.催化剂[M].北京:化学工业出版社,2004:127-136.ZHOU Xueliang,QIN Yongning,MA Zhi,et al.Catalyst(in Chinese),Beijing:Chemical Industry Press,2004:127-136. [2]蔡胜有,黄勇.Al2O3基涂层技术在汽车尾气催化装置中的应用与开发[J].功能材料,1998,29(3):225-228.CAI Shengyou,HUANG Yong.J Funct Mater(in Chinese),1998,29(3):225-228. [3]曾佩兰,黄可龙,刘素琴,等.汽车尾气净化催化剂的研究现状及其进展[J].材料导报,2003,17(3):48-51.ZENG Peilan,HUANG Kelong,LIU Suqin,et al.Mater Rev(in Chi-nese),2003,17(3):8-51. [4]LENAIN G E,MCKINSTTRY H A,LIMAYE S Y,et al.Low thermalexpansion of alkali-zirconium phosphates[J].Mater Res Bull,1984,19(10):1451-1456. [5]BREVAL E,AGRAWAL D K.Thermal expansion characteristics of[NZP],NaZr2P3O12-type materials:a review[J].British Ceram Trans,1995,94(1):27-32. [6]祝琳华,廖学品,郎小川.磷酸盐陶瓷Ca1-xBaxZr4(PO4)6的制备及其零膨胀组成的耐热冲击性研究[J].无机材料学报,2001,16(3):452-458.ZHU Linhua,LIAO Xuepin,LANG Xiaochuan,et al.J Inorg Mater(in Chinese),2001,16(3):452-458. [7]祝琳华.NZP族载体负载的单Pd三效催化剂的表征及催化活性研究[J].化学世界,2007,48(8):449-452.ZHU Linhua.Chem World(in Chinese),2007,48(8):449-452. [8]王零森.特种陶瓷[M].长沙:中南工业大学出版社,2000:72页.WANG Lingsen.Special Ceramics(in Chinese).Changsha:Central South University Press,2000:p72. [9]尹邦跃,王零森,樊毅.乙二醇在络合物溶胶-凝胶法中的应用研究[J].硅酸盐学报,1999,27(3):337-341.YIN Bangyao,WANG Lingsen,FAN Yi.J Chin Ceram Soc(in Chi-nese),1999,27(3):337-341. [10]李良军,祝琳华.络合溶胶-凝胶法合成磷酸盐材料CaZr4(PO4)6[J].硅酸盐学报,2007,35(3):364-367.LI Liangjun,ZHU Linhua.J Chin Ceram Soc(in Chinese),2007,35(3):364-367. [11]祝琳华,李良军.新型抗热震“NZP族涂层-蜂窝堇青石陶瓷”复合载体的制备方法[P].CN Patent,200610010728.8.2008-01-30.ZHU Linhua,LI Liangjun.Preparation of a new type of NZP family coating with thermal shock resistance performance on cordierite hon-eycombed ceramic(in Chinese).CN Patent,200610010728.8.2008-01-30. [12]安琴,冯长根,曾庆轩,等.陶瓷蜂窝载体γ-Al2O3涂层研究进展[J].化学通报,2001(3):135-140.AN Qin,FENG Changgen,ZENG Qingxuan,et al.Chemistry(in Chinese),2001(3):135-140. [13]穆柏春.陶瓷材料强韧化[M].北京:冶金工业出版社,2002:318-325.MU Baichun.Strengthen of Ceramic(in Chinese).Beijing:Metallurgy Industry Press,2002:318-325. [14]高平,崔芳,白庭芳,等.汽车尾气净化用钯催化剂的制备及活性考察[J].分子催化,2004,18(3):203-207.GAO Ping,CUI Fang,BAI Tingfang,et al.Mol Catal(in Chinese),2004,18(3):203-207.
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