CN102313754B - Method for preparing thermal neutron scintillator conversion screen by using paint film preparation device - Google Patents
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- CN102313754B CN102313754B CN 201110179553 CN201110179553A CN102313754B CN 102313754 B CN102313754 B CN 102313754B CN 201110179553 CN201110179553 CN 201110179553 CN 201110179553 A CN201110179553 A CN 201110179553A CN 102313754 B CN102313754 B CN 102313754B
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- luminescent material
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- conversion screen
- neutron scintillator
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003973 paint Substances 0.000 title abstract 3
- 239000000463 material Substances 0.000 claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000007767 bonding agent Substances 0.000 claims description 15
- 239000003822 epoxy resin Substances 0.000 claims description 14
- 229920000647 polyepoxide Polymers 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 10
- 239000012895 dilution Substances 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 7
- 239000012046 mixed solvent Substances 0.000 claims description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012749 thinning agent Substances 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000003085 diluting agent Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention relates to a method for preparing a thermal neutron scintillator conversion screen by using a paint film preparation device, which comprises the following steps: step 1, mixing10The compound of B and the luminescent material are mixed according to the weight ratio of 1: 1-9 and added into the mixture10B compound and adhesive of 0.25-1 times of total weight of luminescent material, mix, add diluent to dilute; step 2, placing the diluted mixture obtained in the step 1 on an aluminum thin plate with the thickness of 0.2-0.8mm, and uniformly spreading the mixture into a preparation film with the thickness of 200-500 mu m by using a paint film preparation device; and 3, placing the prepared film obtained in the step 2 at room temperature until the adhesive is completely cured, and finishing the preparation. The thermal neutron scintillator conversion screen prepared by the method provided by the invention has high detection efficiency on thermal neutrons and proper thickness, so that the thermal neutron scintillator conversion screen has a good light output effect, and in addition, the thermal neutron scintillator conversion screen has good strength and is not easy to damage.
Description
Technical field
The invention belongs to the neutron photography technical field of nondestructive testing, be specifically related to a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen.
Background technology
The ultimate principle that neutron photography is based on ray can decay when passing object.After inciding the sample for the treatment of photograph when neutron, because the atomic nucleus in neutron and the sample interacts (scattering and absorption), neutron intensity can weaken, and has certain relation between transmission neutron intensity and the incident neutron intensity.Because different materials has different attenuation characteristics to neutron beam, the power of this effect is relevant with the character (component, density, hole) of material that sample comprises in the regional area of having an effect, so the transmission neutron bundle namely comprises the information of sample interior composition and structure, the specific technology of recycling and coherent video technology, the space distribution of transmission neutron fluence rate is shown, just can obtain to treat space distribution, the variable density of the inner contained material of product in the same old way, integrated information of various defectives etc.
In the prior art, the lossless detection method that becomes a kind of routine has been established in neutron photography, even has developed into gyp service industry in many countries, has extensively and important use in numerous scientific researches and industrial circle.Neutron convert screen is the important optics original paper in the neutron photography system, after being neutron and its are acted on, its main effect emits the light of α, β, gamma-rays or certain wavelength, soon invisible, uncharged neutron signal is converted into readable signal, read by camera or film then, subimage can produce sub-image effectively during these secondary radiations of producing of neutron convert screen made like this on film.This shows that the performance of neutron convert screen has directly determined the image quality of neutron photography.
At present, business-like starting material for the preparation of the thermal-neutron scintillator conversion screen are to use mostly
6LiF+ZnS (Ag), wherein
6LiF is as the thermal neutron absorbing material, and ZnS (Ag) is as luminescent material, and Ag is as activator.In fact, the condition that obtains high sensitivity thermal-neutron scintillator conversion screen comprises jointing material that absorbing material that suitable starting material granularity, neutron receptivity are good and light transmission are good and absorbing material, luminescent material and this three's of jointing material proportion relation, in order to guarantee best output effect, require various materials to mix cmpletely, because the control of coating uniformly and optimum thickness is to guarantee good light output effect and the key of good discrimination.The selection of material, proportion relation and technological level all can produce material impact to the resolution of photoyield and scintillation screen.
But for the concrete preparation technology of business-like thermal-neutron scintillator conversion screen, also there is not relevant description at present.Patent documentation (the publication number 2007-24629 of Japan, open February 1 2007 date) introduced a kind of method of using muffle furnace to fire the scintillator conversion screen in, after this method uses the glue that contains Si that starting material are evenly mixed, tiling is to flat board, re-use muffle furnace and carry out sintering, prepare the thermal-neutron scintillator conversion screen, but in sintering process, after starting material are heated volumetric expansion can take place, influence its spatial resolution and luminescence efficiency.In addition, because
6The Li thermal neutron absorption cross section is about 910barn, to reasons such as the detection efficiency of thermal neutron are lower, makes
6The resolution of LiF+ZnS (Ag) conversion screen is unsatisfactory.
Summary of the invention
At the defective that exists in the prior art, the purpose of this invention is to provide a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen.Higher to the detection efficiency of thermal neutron by the thermal-neutron scintillator conversion screen that this method makes, thickness is suitable, has intensity preferably, and is not fragile.
For reaching above purpose, the technical solution used in the present invention is: a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen, and this method may further comprise the steps:
Step 1: will contain
10The compound of B and luminescent material are 1 according to weight ratio: the ratio of 1-9 is mixed, and joins weight for containing
10In the 0.25-1 of B compound and the luminescent material general assembly (TW) bonding agent doubly, mix, add the thinning agent dilution again;
Step 2: the potpourri that dilution in the step 1 is good is put on the aluminum thin plate that thickness is 0.2-0.8mm, uses film caster that described potpourri evenly is launched into thickness and is the preparation film of 200-500 μ m;
Step 3: step 2 gained is prepared film at room temperature be placed to bonding agent and solidify fully, finish preparation.
Further, contain described in the step 1
10The weight ratio of B compound and luminescent material is 1: 3-6, described weight ratio is preferably 1: 5.
Further, contain described in the step 1
10The B compound is
10BN,
10B
2O
3Or H
3 10BO
3, described luminescent material is ZnS (X), wherein X is activator: Ag, Cu, Ag+Al or Ag+Au.
Further, described containing
10The B compound is H
3 10BO
3, described luminescent material is ZnS (Ag).
Further, contain described in the step 1
10The particle diameter of B compound and described luminescent material is 1-10 μ m, and described particle diameter is preferably 1-3 μ m.
Further, in the step 1, described bonding agent is polystyrene, the mixed solvent of polymethylmethacrylate or epoxy resin and hardening agent.
Further, described bonding agent is the mixed solvent of epoxy resin and hardening agent, and wherein the weight ratio of epoxy resin and hardening agent is 3-4: 1.
Further, thinning agent described in the step 1 is ethanol, benzene or acetone.
Further, the gauge of sheet of aluminum described in the step 2 is 0.5mm.
The invention has the beneficial effects as follows:
1, selects for use bigger the containing in neutron-absorption cross-section owing to the present invention
10The compound of B is as the neutron absorbing material, thereby the thermal-neutron scintillator conversion screen that adopts method provided by the invention to prepare is higher to the detection efficiency of thermal neutron.
2, the present invention preferably use epoxy resin and hardening agent mixed solvent as bonding agent, can will contain effectively behind the epoxy resin cure
10The compound of B and the particle of luminescent material are bonded together, and make the thermal-neutron scintillator conversion screen that obtains have intensity preferably simultaneously, and be not fragile; And the light transmission of epoxy resin is good, can not influence the transmission of the light of outgoing in the conversion screen.
3, the present invention uses film caster to prepare the thermal-neutron scintillator conversion screen, because molding thickness can be by the film caster adjustment, thereby can access the suitable neutron convert screen of thickness, makes described neutron convert screen have good light output effect.
Description of drawings
Fig. 1 is the process flow diagram of the method for the invention embodiment.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Agents useful for same or material all can be buied on market in following examples.
Embodiment 1
Material and reagent: H
3 10BO
3(production of Dalian Bo Entan Science and Technology Ltd.), luminescent material ZnS (Ag), epoxy resin (happy company, model 20-8150-032 mark in the U.S.), hardening agent (happy company, model 20-8150-008 mark in the U.S.).
The aluminum thin plate that equipment: 0.2mm is thick, film caster (the Tianjin gold inspires confidence in logical sequence Science and Technology Ltd.).
As shown in Figure 1, a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen may further comprise the steps:
(1) with the H of 1.0g
3 10BO
3ZnS (Ag) powder (medium particle diameter is 2 microns) of powder (medium particle diameter is 2 microns), 6.0g and the bonding agent (mixed solvent of the epoxy resin of 5.47g and the hardening agent of 1.53g) of 7.0g mix, add the ethanol dilution of 95% (weight) of 5mL again, stir, mix;
(2) the thick aluminum thin plate of 0.2mm is fixed in (when film caster slipped over, this aluminum thin plate must not move) on the platform;
(3) thickness for preparing film is on demand chosen film caster, is placed on an end of aluminum thin plate:
(4) gained potpourri in the step (1) is placed on the front of film caster, pin the two ends of film caster, speed with 150mm/s makes film caster at the uniform velocity slip over the aluminum thin plate, namely finishes coating, obtains the preparation film (thickness can by the film caster adjustment) of desired thickness;
(5) gained is prepared after film at room temperature placed 5-6 hour, treat that ethanol volatilizees fully, after bonding agent solidifies fully, finish preparation.
Embodiment 2
Material and reagent:
10BN, luminescent material ZnS (Ag+Al), epoxy resin (happy company, model 20-8150-032 mark in the U.S.), hardening agent (happy company, model 20-8150-008 mark in the U.S.).
The aluminum thin plate that equipment: 0.5mm is thick, film caster (the Tianjin gold inspires confidence in logical sequence Science and Technology Ltd.).
As shown in Figure 1, a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen may further comprise the steps:
(1) with 1.0g's
10ZnS (Ag+Al) powder (medium particle diameter is 10 microns) of BN powder (medium particle diameter is 10 microns), 9.0g and the bonding agent (mixed solvent of the epoxy resin of 1.95g and the hardening agent of 0.55g) of 2.5g mix, add the ethanol dilution of 95% (weight) of 5mL again, stir, mix;
(2) the thick aluminum thin plate of 0.5mm is fixed in (when film caster slipped over, this aluminum thin plate must not move) on the platform;
(3) thickness for preparing film is on demand chosen film caster, is placed on an end of aluminum thin plate:
(4) gained potpourri in the step (1) is placed on the front of film caster, pin the two ends of film caster, speed with 150mm/s makes film caster at the uniform velocity slip over the aluminum thin plate, namely finishes coating, obtains the preparation film (thickness can by the film caster adjustment) of desired thickness;
(5) gained is prepared after film at room temperature placed 5-6 hour, treat that ethanol volatilizees fully, after bonding agent solidifies fully, finish preparation.
Embodiment 3
Material and reagent:
10B
2O
3, luminescent material ZnS (Cu), epoxy resin (happy company, model 20-8150-032 mark in the U.S.), hardening agent (happy company, model 20-8150-008 mark in the U.S.).
The aluminum thin plate that equipment: 0.8mm is thick, film caster (the Tianjin gold inspires confidence in logical sequence Science and Technology Ltd.).
As shown in Figure 1, a kind of method of using film caster to prepare the thermal-neutron scintillator conversion screen may further comprise the steps:
(1) with 2.0g's
10B
2O
3ZnS (Cu) powder (medium particle diameter is 1 micron) of powder (medium particle diameter is 1 micron), 2.0g and the bonding agent (mixed solvent of the epoxy resin of 3.125g and the hardening agent of 0.875g) of 4.0g mix, add the ethanol dilution of 95% (weight) of 5mL again, stir, mix;
(2) the thick aluminum thin plate of 0.8mm is fixed in (when film caster slipped over, this aluminum thin plate must not move) on the platform;
(3) thickness for preparing film is on demand chosen film caster, is placed on an end of aluminum thin plate:
(4) gained potpourri in the step (1) is placed on the front of film caster, pin the two ends of film caster, speed with 150mm/s makes film caster at the uniform velocity slip over the aluminum thin plate, namely finishes coating, obtains the preparation film (thickness can by the film caster adjustment) of desired thickness;
(5) gained is prepared after film at room temperature placed 5-6 hour, treat that ethanol volatilizees fully, after bonding agent solidifies fully, finish preparation.
More than in the step (5) of all embodiment, according to the difference of use thinning agent, adhesive type, the time of placement can shorten to 2-3 hour, as long as thinning agent can volatilize fully, bonding agent can solidify fully.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technological innovation scope of the present invention equally.
Claims (7)
1. method of using film caster to prepare the thermal-neutron scintillator conversion screen, this method may further comprise the steps:
Step 1: will contain
10The compound of B and luminescent material are the ratio mixing of 1:1-9 according to weight ratio, and join weight for containing
10In the 0.25-1 of the compound of B and the luminescent material general assembly (TW) bonding agent doubly, mix, add the thinning agent dilution again;
Described containing
10The compound of B is
10BN,
10B
2O
3Or H
3 10BO
3Described luminescent material is ZnS (X), and wherein X is activator: Ag, Cu, Ag+Al or Ag+Au;
Step 2: the potpourri that dilution in the step 1 is good is put on the aluminum thin plate that thickness is 0.2-0.8mm, uses film caster that described potpourri evenly is launched into thickness and is the preparation film of 200-500 μ m;
Step 3: step 2 gained is prepared film at room temperature be placed to bonding agent and solidify fully, finish preparation.
2. method according to claim 1 is characterized in that, described containing
10The compound of B and the weight ratio of luminescent material are 1:3-6.
3. method according to claim 1 is characterized in that, described containing
10The compound of B is H
3 10BO
3, described luminescent material is ZnS (Ag).
4. method according to claim 1 is characterized in that, described containing
10The compound of B and the particle diameter of described luminescent material are 1-10 μ m.
5. method according to claim 1 is characterized in that, described bonding agent is the mixed solvent of epoxy resin and hardening agent, and wherein the weight ratio of epoxy resin and hardening agent is 3-4:1.
6. method according to claim 1 is characterized in that, described thinning agent is ethanol, benzene or acetone.
7. method according to claim 1 is characterized in that, described aluminum gauge of sheet is 0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110179553 CN102313754B (en) | 2011-06-28 | 2011-06-28 | Method for preparing thermal neutron scintillator conversion screen by using paint film preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179553 CN102313754B (en) | 2011-06-28 | 2011-06-28 | Method for preparing thermal neutron scintillator conversion screen by using paint film preparation device |
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| Publication Number | Publication Date |
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| CN102313754A CN102313754A (en) | 2012-01-11 |
| CN102313754B true CN102313754B (en) | 2013-07-10 |
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| CN102243433B (en) * | 2011-06-28 | 2013-10-30 | 中国原子能科学研究院 | High-speed neutron camera device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1054833A (en) * | 1990-02-21 | 1991-09-25 | 东北师范大学 | Neutron photo scintillation enhancing screen |
| JP2005194477A (en) * | 2004-01-09 | 2005-07-21 | Japan Atom Energy Res Inst | Fluorescent material for detecting neutron |
| JP4415095B2 (en) * | 2004-04-15 | 2010-02-17 | 独立行政法人 日本原子力研究開発機構 | Particle beam detector and neutron detector using ZnS phosphor |
| CN1595125A (en) * | 2004-06-30 | 2005-03-16 | 中国科学院上海光学精密机械研究所 | Neutron diffraction enhanced imaging device |
| CN101833105A (en) * | 2009-03-13 | 2010-09-15 | 中国科学院福建物质结构研究所 | Flat-plate ray conversion screen with high spatial and temporal resolution |
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Inventor after: Chen Dongfeng Inventor after: Wei Guohai Inventor after: Wu Liqi Inventor after: Li Junhong Inventor after: Xiao Hongwen Inventor after: Li Meijuan Inventor after: Wu Zhanhua Inventor after: Liu Yuntao Inventor after: Wang Yu Inventor after: Wang Hongli Inventor after: Han Songbai Inventor after: Hao Lijie Inventor after: Wu Meimei Inventor after: Sun Kai Inventor after: He Linfeng Inventor before: Wang Yu Inventor before: Wu Liqi Inventor before: Wang Hongli Inventor before: Han Songbai Inventor before: Hao Lijie Inventor before: Wu Meimei Inventor before: He Linfeng Inventor before: Wei Guohai Inventor before: Chen Dongfeng Inventor before: Liu Yuntao |
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Free format text: CORRECT: INVENTOR; FROM: WANG YU WANG HONGLI HAN SONGBAI HAO LIJIE WU MEIMEI HE LINFENG WEI GUOHAI CHEN DONGFENG LIU YUNTAO WU LIQI TO: CHEN DONGFENG LIU YUNTAO WANG YU WANG HONGLI HAN SONGBAI HAO LIJIE WU MEIMEI SUN KAI HE LINFENG WEI GUOHAI WU LIQI LI JUNHONG XIAO HONGWEN LI MEIJUAN WU ZHANHUA |