CN101186474A - Cement-based composite wave-absorbing material doped with nano titanium oxide and preparation method thereof - Google Patents
Cement-based composite wave-absorbing material doped with nano titanium oxide and preparation method thereof Download PDFInfo
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- CN101186474A CN101186474A CNA2007100099943A CN200710009994A CN101186474A CN 101186474 A CN101186474 A CN 101186474A CN A2007100099943 A CNA2007100099943 A CN A2007100099943A CN 200710009994 A CN200710009994 A CN 200710009994A CN 101186474 A CN101186474 A CN 101186474A
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- Prior art keywords
- cement
- titanium oxide
- nano
- water
- composite wave
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000004568 cement Substances 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 239000011358 absorbing material Substances 0.000 title claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 239000003469 silicate cement Substances 0.000 claims abstract description 8
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 8
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 8
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 6
- 239000006185 dispersion Substances 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 abstract description 6
- 238000002310 reflectometry Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002742 anti-folding effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000005428 wave function Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The composite wave-absorbing material consists of nano titanium oxide, dispersant, silicate cement and water, and the dispersing system includes sodium hexametaphosphate as dispersant and water in the weight ratio of 0.3-0.7 wt% and the water/dry material ratio of 0.32-0.38. The preparation steps are as follows: a. preparing suspension of nano titanium oxide by ultrasonic waves, and b, preparing the cement-based composite wave-absorbing material doped with the nano titanium oxide. According to the invention, a small amount of nano titanium oxide wave absorbing agent is added into the traditional cement material, so that the cement-based composite material has good wave absorbing performance and mechanical property, the economic cost is not increased much, and the preparation process is simple and feasible.
Description
Technical field
The invention belongs to building function material technology field.
Background technology
Cement-base composite wave-absorbing material is to mix wave absorbing agent and have a class type material that absorbs the hertzian wave function in cement or concrete.Aspect civilian, it promptly can be used for shielding electromagnetic wave to the radiation of human body, reaches the purpose that purifies the hertzian wave contaminate environment; Can also be used to preventing the data leak of computer center, play privacy functions.Militarily, cement-base composite wave-absorbing material can play and disturb the radar detection target, weaken echoed signal, makes radar detect fixed ground target or detection accuracy obviously reduces, and avoids enemy's military attack.The cement based absorbing material that is used for civil building reaches electromagnetic reflectivity and just has actual use value more than the 5dB, and the cement based absorbing material that is used for the ground military target surpasses 7dB to the reflectivity of radar wave and also possesses the engineering using value.
The Electromagnetically shielding cement concrete abroad just begins one's study at the beginning of the nineties in last century, wherein studied thin carbon filament, steel paper clip, gluey graphite, coke powder and Stainless Steel Fibre have been mixed the cement-base composite material of making in the cement respectively with the scientific research group headed by the D.D.L.Chung, this cement-base composite material generally can reach about 40dB with interior effectiveness of shielding at 1.5GHz, but reflection loss has only 2-4dB.Domestic in recent years some scholar has also carried out the research work of this respect, studied the sand-cement slurry of mixing steel fiber as people such as Yang Haiyan, in the 2-18GHz range of frequency, the specific absorption of this sand-cement slurry sample is that the bandwidth of 4dB can reach 15.28GHz, and maximum absorbance is 9.8dB; People such as Zhao Yanbo have studied the cement based porous composite wave-suction material that is mixed with expansion type polystyrene (EPS), when the filling ratio (volume fraction) of EPS be 60%, when thickness of sample is 20mm, reflectivity reaches 6GHz less than the bandwidth of-10dB, reaches-15.27dB at the 18GHz minimum reflectance; People such as Xu Weidong have studied the ferrite wave absorbing agent and have been incorporated into absorbing property in the sand-cement slurry, when the ferrite volume be 33% (massfraction), when thickness is 3mm, in the 8-12GHz frequency range, the about 7dB of maximum reflectivity, minimum reflectance reach 15dB, illustrate that ferrite is incorporated into the absorbing property that can improve material in the sand-cement slurry.
The wave frequency that the cement based shielding material of above-mentioned research is shielded nearly all at tens Hz in 1-2GHz, these cement based shielding materials are mainly used in leakage and the outside electromagnetic interference that prevents electromagnetic signal, it is better to the shielding electromagnetic waves effect, but relatively poor to absorption of electromagnetic wave decay and reflection loss; And the absorbing property of the cement based absorbing material of being studied is undesirable, and the mechanical property that is mixed with the cement-base composite material of ferrite wave absorbing agent all has to some extent and reduce, and has influence on practical application.
Summary of the invention
Problem at above-mentioned existence, the objective of the invention is with nano-titanium oxide as wave absorbing agent, make nano-titanium oxide form uniform suspension by ultrasonic dispersing, under mechanical stirring, make the suspension of nano-titanium oxide and cement mixing even then, make cement-base composite wave-absorbing material through vibratory compaction, maintenance.
The present invention and concrete technical scheme are as follows:
Adopt ultrasonic dispersing technology and mechanical stirring method to make nano titanium oxide doped cement-base composite wave-absorbing material.Its composition characteristic is: this composite wave-suction material is made up of nano-titanium oxide, dispersion agent, silicate cement and water, dry material is nano-titanium oxide and silicate cement, and the weight percent that nano-titanium oxide accounts for dry material is that the weight percent that 3%-7%, cement account for dry material is 93%-97%.Dispersion system comprises sodium hexametaphosphate dispersant and water, the mass percent that sodium hexametaphosphate dispersant accounts for dispersion system weight be 0.3%-0.7%, water and dry material ratio just water cement ratio between 0.32-0.38.
The processing parameter of the preparation process of this composite wave-suction material and necessity is as follows:
1, ultrasonic wave prepares the suspension of nano-titanium oxide,
Take by weighing a certain amount of Sodium hexametaphosphate 99 dispersion agent, mass percent by the dispersion system weight of 0.3%-0.7%, be dissolved in a certain amount of water, the concentration that keeps dispersion system is between 7.0%-10%, take by weighing the nano-titanium oxide of 3%-7% again, pour in the above-mentioned solution, place the ultrasonic dispersing instrument, ultra-sonic dispersion 20-30 minute, make uniform nano-titanium oxide suspension.
2, the preparation method of nano titanium oxide doped cement-base composite wave-absorbing material
Take by weighing 42.5 of 93%-97%
#Or 32.5
#, 52.5
#Silicate cement and a certain amount of water, the ratio that makes water and dry material are that water cement ratio remains between the 0.32-0.38; Place cement stirring to irritate, start stirring, the suspension and the water that slowly add nano-titanium oxide, stir and after 3-5 minute compound is poured in the punching block, place on the shaking table vibration 1-2 minute then, floating surface is maintenance 1 day under the condition of 85-90% in 20 ℃-25 ℃ of temperature, humidity, continue maintenance under these conditions after the form removal 28 days, and made nano titanium oxide doped cement-base composite wave-absorbing material.
The present invention mixes a spot of nano-titanium oxide wave absorbing agent in the traditional water mud material, make cement-base composite material have absorbing property and mechanical property preferably, and its Financial cost increases few, preparation technology's simple possible.The reflectivity of this cement-base composite wave-absorbing material in the 8-26.5GHz range of frequency is basically less than 7dB, and minimum reflectance reaches 17.37dB, and reflectivity reaches 11GHz less than the continuous bandwidth of 10dB.Show that this cement-base composite wave-absorbing material has compatible preferably absorbing property in X (8-12.5GHz), KU (12.5-18GHz) and three wave bands of K (18-26.5GHz), realized wideband suction ripple effect; Simultaneously its mechanical property is compared with cement paste and has been improved 12.6% and 19.1%, mechanical property be improved significantly.
Description of drawings
The reflectance test figure of Fig. 1 embodiment sample;
The Mechanics Performance Testing figure of Fig. 2 embodiment sample.
Specific embodiment
Example 1:
1, ultrasonic wave prepares the suspension of nano-titanium oxide,
Take by weighing the mass percent of a certain amount of Sodium hexametaphosphate 99 dispersion agent by 0.5% dispersion system weight, be dissolved in a certain amount of water, the concentration that keeps dispersion system is 9.0%, take by weighing 5% nano-titanium oxide again, pour in the above-mentioned solution, placing ultrasonic power is that 150W, ultrasonic frequency are the ultrasonic dispersing instrument of 40KHz, and ultra-sonic dispersion 25 minutes makes uniform nano-titanium oxide suspension.
2, the preparation method of nano titanium oxide doped cement-base composite wave-absorbing material
Take by weighing 95% 42.5
#Silicate cement and a certain amount of water, the ratio that makes water and dry material are that water cement ratio remains between 0.35; Place cement stirring to irritate, start stirring, the suspension and the water that slowly add nano-titanium oxide, stirring and after 3 minutes compound being poured into the cross section is that 180mm * 180mm, thickness are in the punching block of 5-30mm, place on the shaking table vibration 1 minute then, floating surface is maintenance 1 day under 90% the condition in 20 ℃ of temperature, humidity, continue maintenance under these conditions after the form removal 28 days, and made nano titanium oxide doped cement-base composite wave-absorbing material.
3. anti-folding of its reflectivity in the 8=26.5GHz range of frequency of the sample testing behind the maintenance 28d and its and ultimate compression strength, the results are shown in Figure 1 and Fig. 2.
The reflectivity of sample as can be seen from Fig. 1: the reflectivity of cement paste sample is all more than 6dB, and the reflectivity of nano titanium oxide doped cement-base composite wave-absorbing material is basically below 7dB, wherein reflectivity covers 13-24GHz less than the continuous bandwidth of 10dB, minimum reflectance appears at the 16.2GHz place, its value reaches 17.37dB, embodies wideband absorbing property preferably.
By the mechanical property of sample among Fig. 2 as can be known: the anti-folding of sample and ultimate compression strength have in various degree raising than cement paste respectively behind the maintenance 28d.
Claims (2)
1. nano titanium oxide doped cement-base composite wave-absorbing material, its composition characteristic is: this composite wave-suction material is made up of nano-titanium oxide, dispersion agent, silicate cement and water, dry material is nano-titanium oxide and silicate cement, and the weight percent that nano-titanium oxide accounts for dry material is that the weight percent that 3%-7%, cement account for dry material is 93%-97%.Dispersion system comprises sodium hexametaphosphate dispersant and water, the mass percent that sodium hexametaphosphate dispersant accounts for dispersion system weight be 0.3%-0.7%, water and dry material ratio just water cement ratio between 0.32-0.38.
2. the preparation method of a nano titanium oxide doped cement-base composite wave-absorbing material is characterized in that, the preparation process and the processing parameter of this composite wave-suction material are as follows:
A, ultrasonic wave prepare the suspension of nano-titanium oxide,
Take by weighing a certain amount of Sodium hexametaphosphate 99 dispersion agent, mass percent by the dispersion system weight of 0.3%-0.7%, be dissolved in a certain amount of water, the concentration that keeps dispersion system is between 7.0%-10%, take by weighing the nano-titanium oxide of 3%-7% again, pour in the above-mentioned solution, place the ultrasonic dispersing instrument, ultra-sonic dispersion 20-30 minute, make uniform nano-titanium oxide suspension.
The preparation method of b, nano titanium oxide doped cement-base composite wave-absorbing material
Take by weighing 42.5 of 93%-97%
#Or 32.5
#, 52.5
#Silicate cement and a certain amount of water, the ratio that makes water and dry material are that water cement ratio remains between the 0.32-0.38; Place cement stirring to irritate, start stirring, the suspension and the water that add nano-titanium oxide, stir and after 3-5 minute compound is poured in the punching block, place on the shaking table vibration 1-2 minute then, floating surface is maintenance 1 day under the condition of 85-90% in 20 ℃-25 ℃ of temperature, humidity, continue maintenance under these conditions after the form removal 28 days, and made nano titanium oxide doped cement-base composite wave-absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100099943A CN101186474A (en) | 2007-12-07 | 2007-12-07 | Cement-based composite wave-absorbing material doped with nano titanium oxide and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100099943A CN101186474A (en) | 2007-12-07 | 2007-12-07 | Cement-based composite wave-absorbing material doped with nano titanium oxide and preparation method thereof |
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| CN101186474A true CN101186474A (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100099943A Pending CN101186474A (en) | 2007-12-07 | 2007-12-07 | Cement-based composite wave-absorbing material doped with nano titanium oxide and preparation method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086114A (en) * | 2010-11-19 | 2011-06-08 | 北京工业大学 | Ferrite gypsum-based microwave-absorbing composite material and preparation method thereof |
| CN101767949B (en) * | 2009-01-06 | 2012-07-04 | 上海罗洋新材料科技有限公司 | Volume stabilizer for cement-based composite material and preparation method thereof |
| CN104628421A (en) * | 2015-01-27 | 2015-05-20 | 济南大学 | Surface wave-absorbing modification technology for cement and concrete |
| CN106116366A (en) * | 2016-06-30 | 2016-11-16 | 大连理工大学 | A kind of nano titanium oxide reinforced reactive-powder-concrete and preparation method thereof |
| CN106186905A (en) * | 2016-06-30 | 2016-12-07 | 大连理工大学 | A kind of cement-base composite material mixing bag silicon nano titanium oxide and preparation method thereof |
| CN106278142A (en) * | 2015-06-01 | 2017-01-04 | 武汉理工大学 | A kind of dielectric type function haydite as electromagnetic wave absorption concrete aggregate and preparation method thereof |
| CN106495617A (en) * | 2016-11-10 | 2017-03-15 | 过冬 | A kind of suction ripple cement structures of doping quartz |
| CN106517945A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Graphene/ferric ferrous oxide composite powder modified wave-absorbing cement |
| CN106517947A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Wave-absorbing cement structure doped with quartz and manganese dioxide |
| CN106517948A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Manganese-dioxide-modified wave-absorbing cement |
| CN106517946A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Wave-absorbing cement |
| CN106747044A (en) * | 2016-11-10 | 2017-05-31 | 过冬 | A kind of carbon black modified suction ripple cement |
| CN106747045A (en) * | 2016-11-10 | 2017-05-31 | 过冬 | A kind of suction ripple cement of quartz/manganese dioxide powder modified |
| CN107382148A (en) * | 2017-07-04 | 2017-11-24 | 汤始建华建材（苏州）有限公司 | A kind of multifunctional concrete and preparation method thereof |
| CN108698928A (en) * | 2016-12-26 | 2018-10-23 | 李炳赫 | Multifunctional composite construction material and its construction method |
| CN113800555A (en) * | 2021-09-02 | 2021-12-17 | 重庆大学 | Novel titanium sulfide nano material and preparation and wave-absorbing application of composite material thereof |
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2007
- 2007-12-07 CN CNA2007100099943A patent/CN101186474A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101767949B (en) * | 2009-01-06 | 2012-07-04 | 上海罗洋新材料科技有限公司 | Volume stabilizer for cement-based composite material and preparation method thereof |
| CN102086114A (en) * | 2010-11-19 | 2011-06-08 | 北京工业大学 | Ferrite gypsum-based microwave-absorbing composite material and preparation method thereof |
| CN102086114B (en) * | 2010-11-19 | 2013-05-22 | 北京工业大学 | Ferrite gypsum-based microwave-absorbing composite material and preparation method thereof |
| CN104628421A (en) * | 2015-01-27 | 2015-05-20 | 济南大学 | Surface wave-absorbing modification technology for cement and concrete |
| CN104628421B (en) * | 2015-01-27 | 2016-09-07 | 济南大学 | Wavefront modifier technology is inhaled on the surface of a kind of cement and concrete |
| CN106278142A (en) * | 2015-06-01 | 2017-01-04 | 武汉理工大学 | A kind of dielectric type function haydite as electromagnetic wave absorption concrete aggregate and preparation method thereof |
| CN106116366A (en) * | 2016-06-30 | 2016-11-16 | 大连理工大学 | A kind of nano titanium oxide reinforced reactive-powder-concrete and preparation method thereof |
| CN106186905A (en) * | 2016-06-30 | 2016-12-07 | 大连理工大学 | A kind of cement-base composite material mixing bag silicon nano titanium oxide and preparation method thereof |
| CN106116366B (en) * | 2016-06-30 | 2018-07-13 | 大连理工大学 | A kind of nano-titanium dioxide reinforced reactive-powder-concrete and preparation method thereof |
| CN106186905B (en) * | 2016-06-30 | 2018-07-13 | 大连理工大学 | A kind of cement-base composite material and preparation method thereof for mixing packet silicon nano-titanium dioxide |
| CN106517947A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Wave-absorbing cement structure doped with quartz and manganese dioxide |
| CN106517948A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Manganese-dioxide-modified wave-absorbing cement |
| CN106517946A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Wave-absorbing cement |
| CN106747044A (en) * | 2016-11-10 | 2017-05-31 | 过冬 | A kind of carbon black modified suction ripple cement |
| CN106747045A (en) * | 2016-11-10 | 2017-05-31 | 过冬 | A kind of suction ripple cement of quartz/manganese dioxide powder modified |
| CN106517945A (en) * | 2016-11-10 | 2017-03-22 | 过冬 | Graphene/ferric ferrous oxide composite powder modified wave-absorbing cement |
| CN106495617A (en) * | 2016-11-10 | 2017-03-15 | 过冬 | A kind of suction ripple cement structures of doping quartz |
| CN108698928A (en) * | 2016-12-26 | 2018-10-23 | 李炳赫 | Multifunctional composite construction material and its construction method |
| CN107382148A (en) * | 2017-07-04 | 2017-11-24 | 汤始建华建材（苏州）有限公司 | A kind of multifunctional concrete and preparation method thereof |
| CN113800555A (en) * | 2021-09-02 | 2021-12-17 | 重庆大学 | Novel titanium sulfide nano material and preparation and wave-absorbing application of composite material thereof |
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Open date: 20080528 |