CN103980859A - Silver-doped barium titanate nanometre wave-absorbing material and preparation method thereof - Google Patents
Silver-doped barium titanate nanometre wave-absorbing material and preparation method thereof Download PDFInfo
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- CN103980859A CN103980859A CN201410229994.4A CN201410229994A CN103980859A CN 103980859 A CN103980859 A CN 103980859A CN 201410229994 A CN201410229994 A CN 201410229994A CN 103980859 A CN103980859 A CN 103980859A
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Abstract
The invention discloses a silver-doped barium titanate nanometre wave-absorbing material and a preparation method thereof. The silver-doped barium titanate nanometre wave-absorbing material is composed of silver and barium titanate in a mol ratio of (0.002-0.01) to 1. The preparation method disclosed by the invention comprises the following steps: adding an acetic acid solution, barium acetate and an aqueous solution of silver nitrate into an alcoholic solution of tetrabutyl titanate in turn, and stirring to form transparent sol; putting the transparent sol in a water bath kettle to gelatinize; continuously heating in the water bath to form dry gel; and grinding the dry gel into powder, and thermally processing to obtain the silver-doped barium titanate nanometre wave-absorbing material. The silver-doped barium titanate nanometre wave-absorbing material and the preparation method thereof disclosed by the invention have the advantages that a sol-gel method for preparing the silver-doped barium titanate nanometre wave-absorbing material is simple in process, few in impurity and low in production cost and can be used for scale production; the prepared silver-doped barium titanate nanometre wave-absorbing material is capable of greatly improving the wave-absorbing performance of raw materials and is steady in structure and good in dispersion performance.
Description
Technical field
The present invention relates to nano wave-absorbing material of a kind of silver-colored barium titanate doping and preparation method thereof, belong to absorbing material technical field.
Background technology
Absorbing material refers to the electromagnetic wave attenuation that can make to incide material surface, or directly by the absorption of electromagnetic wave of incident, and electromagnetic energy transformation is become to heat energy or other forms of energy are loose to be consumed, or a kind of functional materials that makes hertzian wave and disappear because mutually interfere.BaTiO
3material has excellent ferroelectricity, dielectricity and piezoelectricity, as the base mateiral of electronic devices and components, optics, suction ripple aspect and be widely used, is a kind of dielectric type absorbing material of excellent property.But meanwhile, barium titanate is as a kind of traditional absorbing material, when existing thin layer, itself inhales the shortcomings such as the weak and narrow bandwidth of intensity of wave, be difficult to adapt to requirement more and more higher to absorbing material in reality.Research shows to make barium titanate crystal produce defect by doped element, causes the change of specific inductivity and magnetic permeability, further improves its absorbing property.
At present, the element of barium titanate doping mainly concentrates on rare earth element and strontium element, yet they are unsatisfactory as absorbing material effect, and main manifestations is narrow for absorbing frequency range.Method using silver element barium titanate doping as absorbing material is also nobody's trial at present, and silver is one of best metallic substance of electroconductibility, is doped to the dielectric properties that can improve material in barium titanate, and effectively improves the absorbing property of material.The sharpest edges that adopt sol-gel method to prepare silver-colored barium titanate doping nano wave-absorbing material are raw material to be distributed to uniformly in solvent and to form low viscosity solution, and reactant is met uniformly in molecularity; Sol-gel method can be doped to trace element in barium titanate uniformly simultaneously, and simple to operate, cost-saving, impurity is less.
Summary of the invention
The object of the present invention is to provide nano wave-absorbing material of a kind of silver-colored barium titanate doping and preparation method thereof, this nano wave-absorbing material not only have under low thick layer, inhale ripple strong, inhale ripple bandwidth feature, and its preparation process is simple, doped element is dispersed.
The present invention takes following technical scheme to be realized: a kind of nano wave-absorbing material of silver-colored barium titanate doping, it is characterized in that, and this nano wave-absorbing material is by silver and barium titanate is compound forms, and wherein the mol ratio of silver and barium titanate is (0.002～0.01): 1.
The preparation method of the nano wave-absorbing material of above-mentioned silver-colored barium titanate doping, is characterized in that comprising following process:
Tetrabutyl titanate is dissolved in in dehydrated alcohol, to form concentration be that 0.5～1.5mol/L solution is solution 1; Barium acetate being joined in deionized water, to be mixed with concentration be that 0.5～1.5mol/L solution is solution 2, is (0.002～0.01) by Silver Nitrate and barium acetate mol ratio: 1 adds Silver Nitrate to obtain solution 3 in solution 2; Get the acetic acid of solution 1 volume 40% and join successively in solution 1 with the solution 3 of solution 1 equal volume amounts, constantly stirring 1～2h and form the vitreosol that solubility is 0.2～0.5mol/L; It is after 0.5～1h, to form gel in 50～70 ℃ of water-baths that transparent sol solution is placed on to temperature; Continuation is in 50～70 ℃ of water-baths, to heat 24～36h to form xerogel in temperature; After xerogel is pulverized, at 700～1000 ℃ of temperature, thermal treatment 1～2h obtains the nano wave-absorbing material of silver-colored barium titanate doping.
Tool of the present invention has the following advantages: sol-gel method prepares that silver-colored barium titanate doping nano wave-absorbing material technique is simple, and impurity is few, and production cost is low, can be used for scale production.Prepared silver-colored barium titanate doping nano wave-absorbing material has greatly improved raw-material absorbing property, and Stability Analysis of Structures, good dispersion property.
Embodiment
Embodiment 1:
6.806g tetrabutyl titanate and 20mL dehydrated alcohol are mixed with to clear solution; 5.108g barium acetate and 0.013g Silver Nitrate and 20mL deionized water are mixed with to settled solution; In situation about constantly stirring, 8mL acetic acid and silver, the barium aqueous solution are slowly splashed in the alcoholic solution of tetrabutyl titanate successively; After continuing to stir 1h, form transparent colloidal sol; After being put into 60 ℃ of water-bath 0.5h, colloidal sol forms gel; Continue 60 ℃ of heating in water bath and within 24 hours, form xerogel; Xerogel is ground to formation powder heat-treats, thermal treatment temp is 950 ℃, and the time is 2h, and after thermal treatment, powder is the nano wave-absorbing material of silver-colored barium titanate doping, it is 26.8dB that this nano wave-absorbing material is inhaled intensity of wave under the suction ripple layer thickness of 1.2mm, and inhaling ripple frequency span is 2.6GHz.
Embodiment 2:
3.403g tetrabutyl titanate and 10mL dehydrated alcohol are mixed with to clear solution; 2.554g barium acetate and 0.013g Silver Nitrate and 10mL deionized water are mixed with to settled solution; In situation about constantly stirring, 4mL acetic acid and silver, the barium aqueous solution are slowly splashed in the alcoholic solution of tetrabutyl titanate successively; After continuing to stir 1h, form transparent colloidal sol; After being put into 60 ℃ of water-bath 0.5h, colloidal sol forms gel; Continue 60 ℃ of heating in water bath and within 24 hours, form xerogel; Xerogel is ground to formation powder and heat-treat, thermal treatment temp is 950 ℃, and the time is 2h, and after thermal treatment, powder is the nano wave-absorbing material of silver-colored barium titanate doping.
Embodiment 3:
6.806g tetrabutyl titanate and 20mL dehydrated alcohol are mixed with to clear solution; 5.108g barium acetate and 0.034g Silver Nitrate and 20mL deionized water are mixed with to settled solution; In situation about constantly stirring, 8mL acetic acid and silver, the barium aqueous solution are slowly splashed in the alcoholic solution of tetrabutyl titanate successively; After continuing to stir 1h, form transparent colloidal sol; After being put into 60 ℃ of water-bath 0.5h, colloidal sol forms gel; Continue 60 ℃ of heating in water bath and within 24 hours, form xerogel; Xerogel is ground to formation powder and heat-treat, thermal treatment temp is 950 ℃, and the time is 2h, and after thermal treatment, powder is the nano wave-absorbing material of silver-colored barium titanate doping.
Claims (2)
1. a nano wave-absorbing material for silver-colored barium titanate doping, is characterized in that, this nano wave-absorbing material is by silver and barium titanate is compound forms, and wherein the mol ratio of silver and barium titanate is (0.002～0.01): 1.
2. by a preparation method for the nano wave-absorbing material of silver-colored barium titanate doping claimed in claim 1, be characterised in that and comprise following process: tetrabutyl titanate is dissolved in in dehydrated alcohol, to form concentration be that 0.5～1.5mol/L solution is solution 1; Barium acetate being joined in deionized water, to be mixed with concentration be that 0.5～1.5mol/L solution is solution 2, is (0.002～0.01) by Silver Nitrate and barium acetate mol ratio: 1, and in solution 2, add Silver Nitrate to obtain solution 3; Get the acetic acid of solution 1 volume 40% and join successively in solution 1 with the solution 3 of solution 1 equal volume amounts, constantly stirring 1～2h and form the vitreosol that solubility is 0.2～0.5mol/L; It is after 0.5～1h, to form gel in 50～70 ℃ of water-baths that transparent sol solution is placed on to temperature; Continuation is in 50～70 ℃ of water-baths, to heat 24～36h to form xerogel in temperature; After xerogel is pulverized, at 700～1000 ℃ of temperature, thermal treatment 1～2h obtains the nano wave-absorbing material of silver-colored barium titanate doping.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618765A (en) * | 2004-11-02 | 2005-05-25 | 西北大学 | Preparation method of niobium doped barium sodium titanate nano-powder |
| US20080053695A1 (en) * | 2006-09-05 | 2008-03-06 | Jae-Chul Choi | Electromagnetic wave absorber and method of constructing the same |
| CN101423244A (en) * | 2008-11-19 | 2009-05-06 | 西北大学 | Method for preparing tin doped barium titanate nano powder |
-
2014
- 2014-05-28 CN CN201410229994.4A patent/CN103980859A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618765A (en) * | 2004-11-02 | 2005-05-25 | 西北大学 | Preparation method of niobium doped barium sodium titanate nano-powder |
| US20080053695A1 (en) * | 2006-09-05 | 2008-03-06 | Jae-Chul Choi | Electromagnetic wave absorber and method of constructing the same |
| CN101423244A (en) * | 2008-11-19 | 2009-05-06 | 西北大学 | Method for preparing tin doped barium titanate nano powder |
Non-Patent Citations (4)
| Title |
|---|
| FENGTAO DU，等: "Preparation and characterization of monodisperse Ag nanoparticles doped barium titanate ceramics", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
| HONGJIE ZHANGA,等: "Electronic structure and photocatalytic properties of Ag–La codoped CaTiO3", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
| RENZHENG CHEN，等: "Effect of Silver Addition on the Dielectric Properties of Barium Titanate-Based X7R Ceramics", 《J. AM. CERAM. SOC.》 * |
| YANKUN LIU,等: "Microwave absorption properties of La doped barium titanate in X-band", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
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Application publication date: 20140813 |