1) chemical co-precipitation
化学共沉淀
1.
Study of La-doped nanosized SnO_2 by chemical co-precipitation;
化学共沉淀法制备镧掺杂纳米二氧化锡的研究
2.
W-Ni-Fe composite oxides nano-powder has been prepared from finely grained tungstate synthesized by chemical co-precipitation and oxided at 600℃.
以化学共沉淀法制备的盐在600℃下氧化,可得W-Ni-Fe复合氧化物,检测分析显示W-Ni-Fe复合氧化物粉的晶粒直径XRD-d为36 nm,W-Ni-Fe复合氧化物粉的颗粒粒径BET-d为98 nm;从SEM图分析看出该复合氧化物粉颗粒团聚性低,压坯EDXS的表面电子图像和元素面分布图显示该复合氧化物粉中W、Ni、Fe元素分布状态是高度均匀分布。
3.
In this work,nanometer magnetite(Fe_3O_4) particles were prepared by chemical co-precipitation,NH_3·H_2O was chosen as precipitating agent,and was added to the mixed aqueous solution containing ferric and ferrous ions to produce nanometer Fe_3O_4 particles.
采用化学共沉淀法制备纳米磁性Fe3O4粒子。
2) chemical coprecipitation
化学共沉淀
1.
Antimony-doped tin oxide (ATO) nanorods with rutile structure were successfully prepared by annealing nanoscale precursor powders at 1 000～1 100(°C) for 1～3 h, which were produced by chemical coprecipitation using SnCl_4·5H_2O and SbCl_3.
以SnCl4·5H2O和SbCl3为原料,采用化学共沉淀法制得纳米级掺锑二氧化锡(ATO)的前驱物,经1000～1100°C焙烧1～3h,成功制备了直径为10～40nm,长为60～500nm的金红石结构的ATO纳米棒。
2.
A series of (Sr1-xPbx) TiO3 ceramic powders were prepared through chemical coprecipitation process.
采用化学共沉淀法制备了一系列(Sr1-xPbx)TiO3陶瓷粉体,通过差热-热重(DTA-TG)分析确定了共沉淀产物的煅烧温度。
3.
71μm to prepare the W-Cu composite by using chemical coprecipitation.
以H2WO4和CuSO4·H2O(W:Cu=70g:30g)为原料,采用化学共沉淀方法制备W-Cu化合物粉末,其反应条件为:反应温度25℃±1℃,pH值5。
3) coprecipitation
['kəupri,sipi'teiʃən]
化学共沉淀
1.
Development in preparation of nanometer soft ferrite with coprecipitation method;
化学共沉淀法制备纳米级软磁铁氧体研究进展
2.
PLZST powders have been prepared by coprecipitation and analyzed by XRD and SEM.
通过化学共沉淀法合成PLZST多晶料,采用XRD和SEM对多晶料进行表征,考察了煅烧温度、过量Pb掺量、退火处理等条件对PLZST多晶料的影响。
3.
A modified chemical coprecipitation route to synthesize homogeneous lead lanthanumzirconate stannate titanate (PLZST) precursors was described.
用改进的化学共沉淀法制备PLZST前驱体,讨论了共沉淀的最佳pH值范围。
4) chemical precipitation
化学共沉淀
1.
CoFe2O4 nano-particles were prepared by chemical precipitation method with NaOH as a precipitating agent.
铁酸钴具有很多优良特性,应用广泛,其制备方法多为微乳液法,本文中用化学共沉淀法制备了纳米CoFe2O4颗粒。
2.
Fe3O4 nano-particles were prepared by chemical precipitation method.
利用化学共沉淀法制备Fe3O4磁性纳米粒子;利用悬浮聚合的方法制备带有酰胺基的聚苯乙烯-丙烯酰胺磁性颗粒(NMP)。
5) chemical coprecipitation method
化学共沉淀法
1.
Preparation of strontium titanate nanopowder by chemical coprecipitation method with new technique
化学共沉淀法制备钛酸锶纳米粉体新工艺
2.
5CoO3 were prepared by chemical coprecipitation methods .
分别以草酸铵和碳酸氢铵为沉淀剂,用化学共沉淀法制备了La0。
3.
Lead zirconate titanate(PZT)nanopowder with a composition in the vicinty of morphotropic phase boundary (Zr/Ti=52/48) is prepared by optimizing the technology process of chemical coprecipitation method.
分析给出了化学共沉淀法制备纳米粉体的机理 。
6) chemical co-precipitation
化学共沉淀法
1.
Synthesis of ZrW_2O_8/ZrO_2 composites with low thermal expansion using chemical co-precipitation method;
化学共沉淀法合成低热膨胀ZrW_2O_8/ZrO_2复合材料
2.
With the chemical co-precipitation,nanometer magnetite(Fe_3O_4)particles are prepared.
采用化学共沉淀法制备了超细微Fe_3O_4颗粒,选用氨水作为沉淀剂,加入到Fe~(2+)和Fe~(3+)溶液中,制得了Fe_3O_4粒子。
3.
Magnetic SO42-/ZrO2-Al2O3-Fe3O4 solid superacids were prepared by introduction of Al2O3 and magnetic substrates via the chemical co-precipitation method.
利用化学共沉淀法将磁性基质与固体酸组装制备磁性纳米固体超强酸催化剂,利用XRD、Raman、TG-DSC、M)ssbauer、TEM、HRTEM等手段对样品性质进行表征。
补充资料：共沉淀
| 共沉淀 coprecipitation 一种沉淀从溶液中析出时，引起某些可溶性物质一起沉淀的现象。其原因有：①表面吸附。由于沉淀表面的离子电荷未达到平衡，它们的残余电荷吸引了溶液中带相反电荷的离子。这种吸附是有选择性的：首先吸附晶格离子；其次，凡与晶格离子生成的盐类溶解度越小的离子，就越容易被吸附；离子的价数愈高，浓度愈大，则愈容易被吸附。升高溶液温度，减小沉淀的表面积，可减小吸附。②包藏。在沉淀过程中，如沉淀剂较浓，又加入过快，则沉淀颗粒表面吸附的杂质离子来不及被主沉淀的晶格离子取代，就被后来沉积上来的离子所覆盖，以至杂质离子陷入沉淀的内部，称为包藏，又叫吸留。由包藏引起的共沉淀也遵循表面吸附规律。③生成混晶。如果晶形沉淀晶格中的阴、阳离子被具有相同电荷的、离子半径相近的其他离子所取代，就形成混晶。 共沉淀现象是玷污沉淀的主要因素。在重量分析中，总是设法减少共沉淀。但是共沉淀分离法却是富集痕量组分的有效方法之一。这是利用溶液中主沉淀物（称为载体或搜集剂）析出时将共存的某些微量组分载带下来而得到分离的方法。例如，在痕量Ra存在下，将硫酸钡沉淀时，几乎可载带下来所有的Ra2+。 |
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参考词条