A kind of preparation method of nano iron oxide with heavy lattice grain boundary
A technology of nano-iron oxide and grain boundary, applied in the field of nano-materials, to achieve the effect of reliable principle, novel structure and excellent performance
Active Publication Date: 2014-10-08
QINGDAO UNIV
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Problems solved by technology
Preparation of petal-shaped nano-α-Fe with heavy-site lattice grain boundaries by oxidation reaction of high-purity iron flakes at high temperature by thermal oxidation method 2 o 3 The technical means have not yet been reported
Method used
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Embodiment
[0016] This embodiment implements according to the following specific steps:
[0017] (1) First use conventional sandblasting technology, select quartz sand with a diameter of 180-220μm, and perform sandblasting on the surface of iron sheets with a purity of 99.99%, a length of 5cm, a width of 3cm, and a thickness of 300μm. The sandblasting time is 10s, the pressure is 0.6MPa, the surface of the obtained treated iron sheet is uneven, and the surface roughness is 1.8-3μm;
[0018] (2) Rinse the surface of the blasted iron sheet with deionized water to remove impurities such as quartz sand and iron filings, and then place the rinsed iron sheet in an ultrasonic cleaner for 5 minutes of ethanol ultrasonic cleaning to obtain the cleaned Iron sheets;
[0019] (3) Put the cleaned iron sheet in N 2 Carry out routine drying under ambient conditions, remove the impurity on its surface, obtain the iron sheet after drying;
[0020] (4) Then put the dried iron sheet into the tube furnac...
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Abstract
The invention belongs to the technical field of nanometer materials and relates to a preparation method for nanometer iron oxide with correspondence matrix crystal boundaries. The preparation method comprises the steps of: firstly processing the surface of the high-purity iron sheet which is taken as an iron source by utilizing a sand blasting technique, then carrying out thermal oxidation reaction at 650 DEG C, and preparing petal-shaped nanometer alpha-Fe203 with the correspondence matrix crystal boundaries, wherein two sets of alpha-Fe203[0001] shaft-provided diffraction points can be used in an electronic diffraction pattern of the petal-shaped nanometer alpha-Fe203, each set of alpha-Fe203[0001] shaft-provided diffraction point represents a layer of crystals, the two sets of diffraction points can coincide by rotating, the rotation degrees are 27.80 degrees, sigma values of the crystal boundaries among the crystals are 13, and the alpha-Fe203 consists of an upper layer of single crystals and a lower layer of single crystals which are completely same. According to the preparation method, the preparation process is simple, the principle is reliable, the cost is low, the pollution is avoided, the material structure is novel, the performance is excellent, and the application range is wide.
Description
Technical field: [0001] The invention belongs to the technical field of nanomaterials, and relates to a thermal oxidation reaction to prepare petal-shaped nano-iron oxide (α-Fe 2 o 3 ) twin crystal method, especially a preparation method of nano-iron oxide with heavy-site lattice grain boundaries, and the prepared materials can be used as sensor materials, magnetic recording materials and fine chemical raw materials. Background technique: [0002] At normal temperature, α-Fe 2 o 3 It is the most stable compound among iron oxides. α-Fe 2 o 3 It is a typical semiconductor material with a band gap of 2.1eV. It has the advantages of low cost, abundant raw materials, environmental friendliness and high corrosion resistance. Due to the quantum confinement effect, surface effect and small size effect, nano-α-Fe 2 o 3 It has many unique physical and chemical properties. Nano α-Fe 2 o 3 Its conductance is sensitive to temperature, humidity, etc., and it is a sensor materia...
Claims
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IPC IPC(8): C01G49/06
Inventor 王乙潜王超梁文双李春艳蔡鎔声
Owner QINGDAO UNIV