采用GNP(Glycine-Nitrate Process)法合成La0.8Ca0.2CrO3初级粉料,研究甘氨酸用量对产物的晶体结构和显微形貌的影响,并测试烧结体的相对密度和电导率.研究结果表明,甘氨酸与金属离子的摩尔比(G/Mn+)控制在2.0~2.5时可得到颗粒尺寸细小、均匀(100nm~200 nm)的单相钙钛矿粉体,烧结温度为1350℃时样品的相对密度达到91.0%,测试温度为800℃时样品的电导率达到30.5 S.cm-1.与常规固相法相比,GNP法制各的样品具有更好的烧结活性和导电性能.
参考文献
[1] | Minh N Q .[J].Journal of the American Ceramic Society,1993,76(03):563. |
[2] | Sakai N;Kawada T;Yokokawa H et al.[J].Journal of Materials Science,1990,25:4531. |
[3] | Sakai N;Kawada T;Yokokawa H et al.[J].Journal of the American Ceramic Society,1993,76(03):609. |
[4] | Sammes N M;Ratnaraj R;Fee M G .[J].Journal of Materials Science,1994,29:4319. |
[5] | Carter JD.;Anderson HU.;Nasrallah MM. .LIQUID PHASE BEHAVIOUR IN NONSTOICHIOMETRIC CALCIUM-DOPED LANTHANUM CHROMITES[J].Journal of Materials Science,1996(1):157-163. |
[6] | Chick L A;Liu J;Stevenson J W et al.[J].Journal of the American Ceramic Society,1997,80(08):2109. |
[7] | Mori M;Hiei Y;Sammes N M .[J].Solid State Ionics,1999,123:103. |
[8] | Simner S.;Stevenson J.;Armstrong T.;Hardy J. .Sintering of non-stoichiometric strontium doped lanthanum chromite[J].Journal of Materials Science Letters,2000(10):863-865. |
[9] | Chakraborty A.;Basu R.N. .Low temperature sintering of La(Ca) CrO_3 prepared by an autoignition process[J].Materials Letters,2000(3/4):162-166. |
[10] | Zupan K;Marinsek M;Pejovnik S et al.[J].Journal of the European Ceramic Society,2004,24:1935. |
[11] | Ovenstone J;Ponton C B .[J].Journal of Materials Science,2000,35:4115. |
[12] | Ovenstone J.;Chan KC.;Ponton CB. .Hydrothermal processing and characterisation of doped lanthanum chromite for use in SOFCs[J].Journal of Materials Science,2002(15):3315-3322. |
[13] | Rivas-Vazquez LP;Rendon-Angeles JC;Rodriguez-Galicia JL;Zhu K;Yanagisawa K .Hydrothermal synthesis and sintering of lanthanum chromite powders doped with calcium[J].Solid state ionics,2004(1/4):389-392. |
[14] | Yang YJ.;Tu HY.;Wang DQ.;Yang JH.;Wen TL. .Characteristics of lanthanum strontium chromite prepared by glycine nitrate process[J].Solid state ionics,2000(1/4):475-479. |
[15] | Mukasyan A S;Costello C;Sherlock K P et al.[J].Separation and Purification Technology,2001,25:117. |
[16] | Stevenson JW.;Armstrong TR.;Chick LA.;Hallman PF. .SINTERING BEHAVIOR OF DOPED LANTHANUM AND YTTRIUM MANGANITE[J].Journal of the American Ceramic Society,1995(3):507-512. |
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