简介:Anitrate-citratecombustionroutetosynthesizeLa0.9Sr0.1Ga0.8Mg0.2O3-δpowderforsolidoxidefuelcellapplicationwaspresented.Thisrouteisbasedonthegellingofnitratesolutionsbytheadditionofcitricacidandammoniumhydroxide,followedbyanintensecombustionprocessduetoanexothermicredoxreactionbetweennitrateandcitrateions.TheoptimumtechnicalparametersarethatthepHvalueis5,andthemolarratioofcitricacidtothetotalmetallicionis1.5:1.X-raydiffractioncharacterizationofcalcinedgelshowsthatpurephasewassynthesizedaftercalcinationat1400℃for10h,andtheTEMresultshowsthecalcinedpowderwithaverageparticlesizeisabout150nm.Thegrainresistancecontributestothetotalresistanceofsinteredpelletbelow500℃.Theconductivityofthesinteredpellentat800℃was0.07S-1.cm-1higherthantheconductivityofYSZ(0.05S-1.cm-1at800℃)
简介:Withpositronannihilationradiationonedimensionangular-correlationdevice,itismeasuredthatpositronannihilationradiationonedimensionangular-correlationcurvesofpolycrystalsodiumionconductorNa5Y1-xCrxSi4O12(NYCS)system.Afterelectronmomentumdistributioncurvesarenormalized,linearparametersarecalculated.TheparametersH,WandSshowthechangeofNa+ionvacancyconcentrationinNYCSseriessamples.TheresultsshowthatparametersH,WandSofonedimensionangular-correlationcurvesofthosesamplesvarygreatlywithCr2O3contents.WithCr2O3contentincreasing,HandSparametersincrease,butWdecreases,andreachesextremesatx=0.05;thenwithCr203addingcontinually,parametersHandSdecreasegradually,parameterWincreasesgradually.Thisshowsthat,inaddtiontoCr2O3,theconductivityhascloserelation
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简介:CaO的增加的影响,咕咕叫并且微观结构和磁性上的V2O5(Mg0.476Mn0.448Zn0.007)(Fe1.997Ti0.002)O4铁酸盐被调查。粉末(Mg0.476Mn0.448Zn0.007)(Fe1.997Ti0.002)O4作文被使用处理技术的常规陶器的粉末准备。试验性的结果证明平均谷物与0.03wt%CaOsintered铁酸盐codoped缩放,0.04wt%咕咕叫并且0.06wt%V2O5是大约15m;铁酸盐的浸透磁化是68.78emu/g。在铁酸盐的V2O5的增加不能仅仅增加浸透磁化的价值,而且减少平均谷物尺寸(Mg0.476Mn0.448Zn0.007)(Fe1.997Ti0.002)O4铁酸盐。同时的加入咕咕叫,CaO和V2O5掺杂物进(Mg0.476Mn0.448Zn0.007)(Fe1.997Ti0.002)O4铁酸盐不能仅仅改进材料的浸透磁化,而且禁止反常谷物生长。
简介:导致流动的腐蚀在于电气化学、机械的components.Thepresent纸有到估计了氯化物离子的角色并且在为是的AA5083-H321铝镁合金的导致的腐蚀广泛地在高速度的船,潜水艇,气垫船,和脱盐系统的构造使用了的流动的电气化学的部件溶解了氧,在NaClsolutions.Electrochemical,测试在0,2,5,7和10m/s的流动速度被执行,在有不同氯化钠集中的充气并且使除去空气的NaCl答案。结果证明在水动力学条件下面的氧减小的高率在表面上在坑的密度引起增加。在流动条件下面的氯化物离子集中的增加加速阳极的反应的率,但是没在阴极的反应上有影响。在当前的工作,因此,在流动条件下面,由于在坑内的腐蚀产品的消除,合金的腐蚀电阻被增加,这被发现。