利用化学共沉淀法，在处理铬渣的同时，制备四氧化三铁。
Fe3O4 was prepared by using chemical precipitation in dealing with chromium residue simultaneously.
本文报导了不同制备条件下四氧化三铁薄膜的结构和磁性。
The magnetic properties and microstructure of Fe3O4 thin films prepared under different conditions have been evaluated.
对水基四氧化三铁磁流体在缓变磁场中的透射率进行了研究。
The transmission of light in the aqueous ferrofluid films of Fe3O4 in slowly-changing magnetic fields was investigated.
关键词：磁性沸石，合成，四氧化三铁(Fe3O4)，复合颗粒。
纳米四氧化三铁作为催化剂多次循环使用后仍具有较高的催化活性。
The nano-sized Fe3O4 catalysts after used for several times and recycled still remained a high activity.
我们还合成了磷酸钙-四氧化三铁复合物，应用于基因的可控运输和转染。
Then we prepared calcium phosphate-magnetite hybrid materials to deliver and transfect DNA.
具体结果如下：以聚乙二醇为模板，在水热条件下了合成四氧化三铁纳米棒。
The result is as follows:Synthesis of magnetite nanorods with PEG as template under hydrothermal condition.
此外，对四氧化三铁溶液的不同干燥方法，也是影响其粒度大小的另一主要因素。
The way for drying the solution of Fe_3O_4 is another major factor…
在水溶液中，经表面修饰的四氧化三铁纳米颗粒能保持超过18个月的单分散性而不沉淀。
The surface-modified Fe3O4 nanoparticles were monodispersed in an aqueous solution and did not precipitate in over 18 months.
透射电镜结果显示，四氧化三铁纳米颗粒附着在4-6nm厚的纳米线束表面形成复合物。
Transmission electron micrographs show that the composite consists of Fe(3)O(4) nanoparticles attached to the surfaces of the 4-6 nm thick nanowire bundles.
实现了纳米颗粒状四氧化三铁和纳米层片状羟基磷灰石的复合，四氧化三铁分布均匀，无团聚。
The composition of nano granulated ferroferric oxide and nano lamellar hydroxyapatite is realized, and the ferroferric oxide has uniform distribution and no agglomeration.
对细胞的横切面分析进一步显示，大部分的四氧化三铁纳米颗粒被细胞表面强烈地吸附并包裹了细胞。
TEM cross section analysis of the cells showed further that the Fe3O4 nanoparticles were for the most part strongly absorbed by the surfaces of the cells and coated the cells.
试验证明：碱金属碳酸盐，碱金属氢氧化物和碳酸钠同四氧化三铁的复合剂，都表现出相接近的催化活性。
The test demonstrates that alkali carbonates, alkali hydroxides and a combination of sodium carbonate with ferriferrous oxide all exhibit approximate catalytic activity.
以六水三氯化铁、四水二氯化铁和氨水为原料，在超声波辅助下，水热法制备了磁性四氧化三铁纳米粒子。
The nano-sized magnetic Fe3O4 particles was synthesized by hydro-thermal method with the help of ultrasonic wave by reacting FeCl3·6H2O with FeCl2·4H2O and NH3·H2O.
以合成的纳米四氧化三铁为催化剂，过氧化氢为氧化剂，催化氧化含邻苯二酚的模拟废水和含邻甲苯酚的工业废水。
The nano-sized particles of Fe3O4 were used as catalysts for degradation of the catechol simulated wastewater and o-cresol industrial wastewater with hydrogen peroxide in the oxidation.
以合成的纳米四氧化三铁为催化剂，过氧化氢为氧化剂，催化氧化含邻苯二酚的模拟废水和含邻甲苯酚的工业废水。
The nano-sized particles of Fe3O4 were used as catalysts for degradation of the catechol simulated wastewater and o-cresol industrial wastewater with hydrogen peroxide in the oxidation.
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