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钙钛矿相

钙钛矿相的相关文献在1994年到2022年内共计143篇,主要集中在化学工业、电工技术、物理学 等领域,其中期刊论文93篇、会议论文15篇、专利文献210692篇;相关期刊54种,包括宁波大学学报(理工版)、材料工程、功能材料等; 相关会议14种,包括第一届新型太阳能电池暨钙钛矿太阳能电池学术研讨会、第六届稀有金属冶金学术委员会全体委员工作会议暨全国稀有金属学术交流会、2007年全国溶胶-凝胶科学技术学术会议等;钙钛矿相的相关文献由331位作者贡献,包括韩高荣、任召辉、尹思敏等。

钙钛矿相—发文量

期刊论文>

论文:93 占比:0.04%

会议论文>

论文:15 占比:0.01%

专利文献>

论文:210692 占比:99.95%

总计:210800篇

钙钛矿相—发文趋势图

钙钛矿相

-研究学者

  • 韩高荣
  • 任召辉
  • 尹思敏
  • 崔斌
  • 田长生
  • 史启祯
  • 沈鸽
  • 徐刚
  • 常爱民
  • 庄志强
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 胡晓敏; 陈慧; 贾玄弈; 王巧; 黄利宏
    • 摘要: 为了有效地从生物质衍生的乙酸中获得高氢气产率,通过水热法合成了一系列的NiMnY催化剂并用于乙酸自热重整(ATR)过程中,并采用X射线衍射(XRD)、N2吸附-脱附测试、H2程序升温还原(H2-TPR)探究催化剂中的内在联系.在Ni0.39Mn0.61YO3.11±δ催化剂中,经焙烧后形成了类钙钛矿型(Ni,Mn)YO3物相;经氢气还原后,转化为含有MnO、Y2O3和高分散Ni纳米粒子的热稳定的Ni-Mn-Y-O物种.Ni0.39Mn0.61YO3.11±δ具有高效稳定的产氢催化性能,乙酸转化率高达100%,氢气产率达到2.68 molH2·molHAc-1.
    • 摘要: 据物理学家组织网报道,一个国际科研团队在寻找新的物质形态方面取得重大突破:他们证明,与钙钛矿相关的金属氧化物TbInO3展现出量子自旋液态,这是科学家很长时间以来一直在追寻的一种物质形态,有望应用于量子计算等领域。
    • 罗婷; 王武尚; 林建国
    • 摘要: By using the lead acetate trihydrate (Pb(CH3COO)2·3H2O), lanthanum acetate (La(CH3COO)3), tin acetate (Sn(CH3COO)4), zirconium acetate (Zr(CH3COO)4) and tetrabutyl titanate (C16H36O4Ti) as the raw materials, the (Pb0.97La0.02)(Zr0.95Sn0.01Ti0.04) (PLZST) antiferroelectric ceramic powders were prepared by an improved sol-gel technology.The decomposability of the dried PLZST gel powders was studied by DSC-TGA differential thermal analysis.The influence of sintering temperature on PLZST ceramic powders was studied by XRD and SEM analysis.The results showed that the sintering temperature of dried PLZST gel powders should be above 550 °C.When the sintering temperature is 850 °C, the relatively pure perovskite phase PLZST ceramics were formed and the PLZST ceramic powders were spherical particles with average grain size about 200 nm.%以三水合乙酸铅(Pb(CH3COO)2·3H2O)、乙酸镧(La(CH3COO)3)、乙酸锡(Sn(CH3COO)4)、乙酸锆(Zr(CH3COO)4)、钛酸丁酯(C16H36O4Ti)为原料,采用改进的溶胶-凝胶(sol-gel)工艺制备(Pb0.97La0.02)(Zr0.95Sn0.01Ti0.04)O3(简称PLZST)反铁电陶瓷粉.采用DSC-TGA差热分析研究PLZST干凝胶的分解性能,用XRD和SEM对不同温度煅烧的PLZST陶瓷粉进行表征,分析煅烧温度对产物的影响.实验结果表明,PLZST干凝胶在550 °C以上达到完全分解;干凝胶粉体在850 °C煅烧2 h,可生成较纯钙钛矿相的高锆含量PLZST陶瓷粉体,粉体颗粒呈球形,平均晶粒约为200 nm.
    • 李光武; 赵丽琼
    • 摘要: 实验结果表明,钙钛矿相的析出与冷却速度有关.冷却速度小,钙钛矿相的析出量大。为促进高钛高炉渣中钙钛矿相选择性析出,满足选矿分离的要求,分别在恒温和连续冷却过程中研究了钙钛矿相的析出行为。实验结果表明,钙钛矿相析出的适宜温度区间为1400~1300°C,熔渣在此温度范围内缓慢冷却(冷却速度0.5°C/min),可有效促进钙钛矿相析出并使其枝晶产生粗化,结晶量达24.89%,晶粒度达48.27μm。此外,通过钙钛矿晶体形貌的变化,探讨了枝晶粗化机理,认为晶体产生缩颈重熔促进了枝晶粗化。
    • Li Zhang; Wu Zhang; Ju-hua Zhang; Guang-qiang Li
    • 摘要: The influences of additives on the phase transformation, occurrence state, and the interface of the Ti component in Ti-bearing blast furnace slag were investigated. After oxidation, most of the Ti component in the slag was enriched into the perovskite phase, which served as the Ti-rich phase during the crystallization process. The phase transformation, occurrence state, and the interface of the Ti component were observed to be affected by the addition of different types of agents. During the oxidation process, titanaugite and Ti-rich diopside phases gradually transformed into non-Ti phases(anorthite: CaMgSi_2O_6 and CaAl_2Si_2O_8) in the form of dendrites or columns, which were observed to be distributed at the surface of the perovskite phase. Several more cracks appeared along the grain boundaries of the perovskite phase after the addition of P_2O_5, facilitating the liberation of the perovskite phase. Composite additives combining both an acid and a base, such as CaO + CaF_2 or P_2O_5 + CaF_2, were used. We observed that the disadvantages of using single additives were successfully overcome.
    • U.K.N.Din; T.H.T.Aziz; M.M.Salleh; A.A.Umar
    • 摘要: We report an experimental route for synthesizing perovskite-structured strontium titanate(SrTiO_3) nanocubes using an alkali hydrothermal process at low temperatures without further heating.Furthermore,we studied the influence of heating time(at 180°C) on the crystallinity,morphology,and perovskite phase formation of SrTiO_3.The SrTiO_3 powder,which is formed via nanocube agglomeration,transforms into cubic particles with a particle size of 120-150 nm after 6 h of hydrothermal sintering.The crystallinity and percentage of the perovskite phase in the product increased with heating time.The cubic particles contained 31.24at%anatase TiO_2 that originated from the precursor.By varying the weight ratio of anatase TiO_2 used to react with the strontium salt precursor,we reduced the anatase-TiO_2 content to18.8at%.However,the average particle size increased when the anatase-TiO_2 content decreased.
    • 魏笑峰; 赵文涛; 蔡国辉; 郑勇; 谢增鸿; 肖益鸿; 魏可镁
    • 摘要: La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts(x = 0. 3,0. 5,0. 7)were prepared using acrylamide assisted polymeric citrate combustion route,and their catalytic performance for complete oxidation of benzene was investigated. The catalysts were characterized by means of N2 physical adsorption,X-ray diffraction,scanning electron microscopy and X-ray photoelectron spectroscopy. The results showed that the order of catalytic activity was as follows:La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 > La0. 6 Sr0. 4 Co0. 5 Mn0. 5 O3 > La0. 6 Sr0. 4 Co0. 3 Mn0. 7 O3 >LaCoO3 . La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts(x = 0. 3,0. 5,0. 7)possessed perovskite crystal phase together with minor SrCO3 . Compared with LaCoO3 ,La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts had greater specific surface area, bigger pore volume and less particle aggregation. La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 catalyst had higher crystallinity degree and more adsorbed oxygen and lattice oxygen than La0. 6 Sr0. 5 Co0. 5 Mn0. 3 O3 and La0. 6 Sr0. 4 Co0. 3 Mn0. 7 O3 catalysts. Therefore,La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 exhibited good stability for benzene complete catalytic oxidation during the stability test for 78 h.%以丙烯酰胺辅助柠檬酸为络合试剂,采用溶胶-凝胶燃烧法制备 La0.6 Sr0.4 Co1- x Mnx O3催化剂(x =0.3、0.5、0.7)并与 LaCoO3进行比较,进行 XRD、BET、SEM、XPS 和苯的催化氧化性能和稳定性表征。结果表明,催化活性顺序为:La0.6 Sr0.4 Co0.7 Mn0.3 O3> La0.6 Sr0.4 Co0.5 Mn0.5 O3> La0.6 Sr0.4 Co0.3 Mn0.7 O3> LaCoO3。La0.6 Sr0.4 Co1- x Mnx O3催化剂生成钙钛矿相的同时还伴生少量 SrCO3杂相。与 LaCoO3对比,La0.6 Sr0.4 Co1- x Mnx O3催化剂拥有更大的比表面积、孔容和抗团聚性,具有更好的催化氧化活性。在 La0.6 Sr0.4 Co1- x Mnx O3(x =0.3、0.5、0.7)催化剂中,La0.6 Sr0.4 Co0.7 Mn0.3 O3催化剂比其他两种催化剂具有更高的钙钛矿相结晶度和更多的表面吸附氧与晶格氧,活性最高。78 h 稳定性测试结果表明,La0.6 Sr0.4 Co0.7 Mn0.3 O3催化剂表现出良好的稳定性。
    • 杜娴; 杜慧玲; 刘俊; 姚淼
    • 摘要: 采用微波辅助溶胶-凝胶自蔓燃法制备了具有准同型相界组成的0.94Na0.5Bi0.5TiO3-0.06BaTiO3(0.94NBT-0.06BT)粉体,采用X射线粉末衍射、红外光谱、热重-差热等分析手段对粉体进行了分析表征。通过对合成工艺中溶液的pH值、不同络合剂、微波功率等参数的优化,获得了合成单相钙钛矿结构0.94NBT-0.06BT无铅压电纳米粉体的最优工艺参数:使用柠檬酸作为络合剂、溶液pH值为4-6、微波功率为520 W,热处理温度为500°C,合成后的粉体大小均匀,粒度分布在10-20 nm之间。利用红外光谱和热分析探讨了蔓燃反应的合成机理。
    • 王燕; 林金辉; 邓苗; 肖忠洋; 甘甜
    • 摘要: 采用柠檬酸盐法合成了钙钛矿相的Na0.5Bi0.5TiO3粉体,利用TG-DTA、XRD、SEM及激光粒度仪对Na0.5Bi0.5TiO3粉体进行了分析表征,讨论了前驱体溶液pH值对合成粉体的影响.结果表明,当前驱体溶液pH=8.5,柠檬酸与金属离子摩尔比r(C/Mn+)=1.25,水浴温度为80°C,煅烧温度为600°C时,所制备出的Na0.5Bi0.5TiO3晶体呈球形,其颗粒细小,粒径为100~200 nm.相同条件下,当pH=2.5时产物主要是富含Na、Ti、O的棒状物质.pH=6.5时所得粉体主要是Na0.5Bi0.5TiO3相,粉体颗粒呈球状,粒径为500~600 nm,其中存在少量的块状颗粒,粒径分布不均匀.pH=10.5时产物中含有较多Bi3Ti4O12杂相,粒径较大.
    • 任伟; 李俊红; 赵修臣; 刘颖
    • 摘要: 以丙醇锆(C12H28O4Zr)、醋酸铅(Pb(CH3COO)2.3H2O)、异丙醇钛(Ti{OCH(CH3)2}4)为原料,采用改进的溶胶-凝胶(Sol-Gel)工艺,研究了不同的热处理制度对于Pb(Zr0.52Ti0.48)O3粉体的物相形成、晶粒尺寸及颗粒分散度等的影响。实验结果表明,Sol-Gel法制备PZT粉体,预结晶温度段,改变烧结时间,对于粉体颗粒的尺寸影响不大;结晶温度段,改变结晶时间或结晶温度,会对颗粒尺寸产生较大的影响。
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