CN102214490B - Neutron shielding material and manufacturing method thereof - Google Patents
Neutron shielding material and manufacturing method thereof Download PDFInfo
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- CN102214490B CN102214490B CN 201110105735 CN201110105735A CN102214490B CN 102214490 B CN102214490 B CN 102214490B CN 201110105735 CN201110105735 CN 201110105735 CN 201110105735 A CN201110105735 A CN 201110105735A CN 102214490 B CN102214490 B CN 102214490B
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Abstract
The invention discloses a neutron shielding material and a manufacturing method thereof, belonging to the field of neutron shielding. The neutron shielding material provided by the invention comprises sodium borate, sodium silicate and sodium fluosilicate, wherein the proportion by weight parts of the sodium borate, the sodium silicate and the sodium fluosilicate is 100:m:n, the value of m is 50-70, and the value of n is 5-15. The method provided by the invention comprises the following steps of: 1) taking predetermined parts of sodium borate, sodium silicate and sodium fluosilicate, wherein the proportion by weight parts of sodium borate, sodium silicate and sodium fluosilicate is 100:m:n, the value of m is 50-70, and the value of n is 5-15; 2) adding water to dilute the sodium silicate, then, adding the diluted sodium silicate into the mixture of the sodium borate and the sodium fluosilicate, and mixing uniformly; and 3) adding the uniformly mixed mixture into a press mould, performing extrusion molding, and then demoulding. The material provided by the invention is excellent in neutron shielding capability, controllable in moulding speed, simple in technology and low in cost, and has certain mechanical strength.
Description
Technical field
The invention belongs to the NEUTRON PROTECTION field, relate to a kind of neutron shielding material and preparation method thereof, can distinguish neutron shield for wide from the fast neutron to the thermal neutron.
Background technology
Neutron is one of nucleon of composed atom nuclear, and neutral is not subjected to the impact of atom electric field when occuring to interact with material, and directly and atomic nucleus interact, have stronger penetrability so it is compared with X ray, gamma-rays.Neutron has huge effect at aspects such as nuclear energy, nuclear weapon, material flaw detection, well logging, activation analyses, all occupies an important position in national defence, commercial production.But because the strong penetrability of neutron makes it produce very strong radiation damage to human body, environment, instrument and equipment etc., the normal operation of life-threatening safety and instrument is to make neutron normally be human necessary means of serving so neutron is shielded well.
Shielding to neutron is generally extremely more low-yield by light element slowing down fast neutron, re-uses the materials such as boron, lithium, cadmium and absorbs, and lowers the outer neutron dose of shield to the purpose of security level to reach.Traditional neutron shielding material comprise Boron-containing-PE (list of references: Zhu Guangning etc. Xi'an pulsed reactor neutron photography shield. atomic energy science and technology, Vol.40, No.5sep.2006), boron containing cement, tungalloy (list of references: Wu Wensheng. the neutron shield research of neutron-gamma logging instrument. nuclear electronics and Detection Techniques, Vol.24, No.1 Jan.2004) etc., newly developed such as hydroboration zirconium (Zr (BH4) 4) and zircoium hydride (ZrH2) (list of references: T.Hayashi, Journal of Nuclear Materials 386-388 (2009) 119-121) etc., these materials have preferably shield effectiveness to neutron, but exist cost high, shaping speed is slow, the problems such as complex process.Along with the development that neutron is used, different occasions have proposed different requirements to neutron shielding material.
Summary of the invention
The purpose of this invention is to provide a kind of neutron shielding material and preparation method thereof, mainly for compact accelerator neutron source, isotope neutron source etc.; Integrated cost and shield effectiveness, the present invention can play good supplementary function to existing neutron shielding material, traditional shielding material process-cycle is longer, the present invention since faster shaping speed can tackle emergency case, such as the shutoff in early stage of nuclear leakage; Be not in the situation of major consideration at the shielding material volume, the present invention can be used as the substitute of Boron-containing-PE, greatly reduces the shielding cost; The present invention provides the preparation method of this shielding material simultaneously.
Technical scheme of the present invention is:
A kind of neutron shielding material is characterized in that comprising borax, water glass, sodium fluosilicate; Wherein, the proportioning of the parts by weight of described borax, water glass, sodium fluosilicate is 100: m: n; The m value is that 50～70, n value is 5～15.
A kind of method for making of neutron shielding material the steps include:
1) gets setting umber borax, sodium fluosilicate potpourri and water glass; Wherein, the proportioning of the parts by weight of described borax, water glass, sodium fluosilicate is 100: m: n; The m value is that 50～70, n value is 5～15;
2) with behind the water glass thin up, join in borax and the sodium fluosilicate potpourri and stir;
3) potpourri that stirs is added in the compacting tool set demoulding after the extrusion modling.
Further, described water glass and water dilute according to the proportioning of 1: 10～1: 15 parts by weight.
Further, described water glass and water dilute according to the proportioning of 1: 10 parts by weight.
Further, the proportioning of the parts by weight of described borax, water glass, sodium fluosilicate is 100: 60: 6.
The present invention is directed to the feature of neutron, should be rich in neutron moderator and absorbing agent in the shielding material, so material of the present invention comprises borax, water glass and a small amount of sodium fluosilicate hardening agent.Described shielding material be borax, water glass, sodium fluosilicate according to 100: the proportioning of the parts by weight of m: n is mixed, wherein the umber of water glass is adjustable to 70 parts at 50 parts, umber is fewer, adhesive power is poorer, bad mechanical strength, on the contrary adhesive power is stronger, and physical strength is large, but the borax relative content descends, and affects thermal neutron and absorbs; The umber of hardening agent affects the shaping speed of material at 5 to 15 parts of capable of regulatings.Borax and water glass are chemical industry and building materials commonly used, wide material sources, and cost is low, and is easy and simple to handle.Select as required the proportioning of water glass and hardening agent during use, suitably improve the umber of water glass and hardening agent for the high occasion of requirement of mechanical strength.Contain bulk crystallization water and free water in the moulding material, fast neutron is had preferably slowing down power(SDP), and (borax is Na
2B
4O
710H
2O contains a large amount of water of crystallization; Water glass solidifies provides free water and partially crystallizable water, and the protium in borax and the water glass can both play good slowing down effect to fast neutron); Boron element in the borax has extremely strong receptivity to the thermal neutron after slowing down.Material of the present invention slightly is inferior to Boron-containing-PE to the shielding of neutron, but all has superiority than Boron-containing-PE on price and difficulty of processing.
Compared with prior art, good effect of the present invention is:
Usefulness of the present invention is that the material that provides has preferably neutron shield ability, and certain physical strength is arranged, and shaping speed is controlled within the specific limits with curing dose, and technique is simple, and is with low cost.
Mode by fast neutron imaging has been carried out the neutron shield aptitude tests to the material of inventing, and contrast material is Boron-containing-PE, epoxy resin borax potpourri 1 (mass ratio is 35: 100), epoxy resin borax potpourri 2 (mass ratio is 40: 100) and the material of the present invention (borax, water glass, hardening agent mass ratio are 100: 60: 6) of 1 centimetre of thickness; Accompanying drawing 1 be four kinds of materials of 1cm thickness to the shielding result of neutron signal, transverse axis is material, the longitudinal axis is screening ability (take the screening ability of Boron-containing-PE as 1, carrying out normalized).
Description of drawings
Fig. 1 is that four kinds of materials of 1cm thickness are to the shielding result signal of neutron;
Fig. 2 is method for making process flow diagram of the present invention.
Embodiment
As shown in Figure 2, be the method for making of shielding material of the present invention:
Embodiment one
1 gets borax and sodium fluosilicate potpourri according to 100: 5 parts by weight mixes; Wherein, the proportioning of the parts by weight of borax, water glass, sodium fluosilicate is 100: 50: 5;
2 with the water glass thin up, and the ratio of water is 1/10th to 1/15th of water glass quality.Larger water ratio is beneficial to stirring, but can reduce bond properties, and the dilution ratio of selecting 1: 10 is more excellent equilibrium point.
3 water glass after will diluting slowly add borax and sodium fluosilicate potpourri, and stir rapidly.
4 with in the potpourri adding compacting tool set that stirs, and extrusion modling is used after the demoulding.
Described shielding material preliminary setting time is 5-30 minute (different with curing dose), and fully about 6-24 hour set time, solidification temperature is room temperature.
Embodiment two
1 gets borax and sodium fluosilicate potpourri according to 100: 6 parts by weight mixes; Wherein, the proportioning of the parts by weight of borax, water glass, sodium fluosilicate is 100: 60: 6;
2 with the water glass thin up, and the ratio of water is 1/12nd of water glass quality.Larger water ratio is beneficial to stirring, but can reduce bond properties.
3 water glass after will diluting slowly add borax and sodium fluosilicate potpourri, and stir rapidly.
4 with in the potpourri adding compacting tool set that stirs, and extrusion modling is used after the demoulding.
Described shielding material preliminary setting time is 5-30 minute (different with curing dose), and fully about 6-24 hour set time, solidification temperature is room temperature.
Embodiment three
1 gets borax and sodium fluosilicate potpourri according to 100: 15 parts by weight mixes; Wherein, the proportioning of the parts by weight of borax, water glass, sodium fluosilicate is 100: 70: 15;
2 with the water glass thin up, and the ratio of water is 1/15th of water glass quality.
3 water glass after will diluting slowly add borax and sodium fluosilicate potpourri, and stir rapidly.
4 with in the potpourri adding compacting tool set that stirs, and extrusion modling is used after the demoulding.
Described shielding material preliminary setting time is 5-30 minute (different with curing dose), and fully about 6-24 hour set time, solidification temperature is room temperature.
Claims (8)
1. a neutron shielding material is characterized in that comprising borax, water glass, sodium fluosilicate; Wherein, the proportioning of the parts by weight of described borax, water glass, sodium fluosilicate is 100: m: n; The m value is that 50～70, n value is 5～15.
2. neutron shielding material as claimed in claim 1 is characterized in that described water glass and water dilute according to the proportioning of 1: 10～1: 15 parts by weight.
3. neutron shielding material as claimed in claim 2 is characterized in that described water glass and water dilute according to the proportioning of 1: 10 parts by weight.
4. such as claim 1 or 2 or 3 described neutron shielding materials, the proportioning that it is characterized in that the parts by weight of described borax, water glass, sodium fluosilicate is 100: 60: 6.
5. the method for making of a neutron shielding material the steps include:
1) gets setting umber borax, sodium fluosilicate potpourri and water glass; Wherein, the proportioning of the parts by weight of described borax, water glass, sodium fluosilicate is 100: m: n; The m value is that 50～70, n value is 5～15;
2) with behind the water glass thin up, join in borax and the sodium fluosilicate potpourri and stir;
3) potpourri that stirs is added in the compacting tool set demoulding after the extrusion modling.
6. method as claimed in claim 5 is characterized in that described water glass and water dilute according to the proportioning of 1: 10～1: 15 parts by weight.
7. method as claimed in claim 6 is characterized in that described water glass and water dilute according to the proportioning of 1: 10 parts by weight.
8. such as claim 5 or 6 or 7 described methods, the proportioning that it is characterized in that the parts by weight of described borax, water glass, sodium fluosilicate is 100: 60: 6.
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| CN 201110105735 CN102214490B (en) | 2011-04-26 | 2011-04-26 | Neutron shielding material and manufacturing method thereof |
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| CN102214490B true CN102214490B (en) | 2013-05-29 |
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| CN107240428A (en) * | 2017-07-27 | 2017-10-10 | 深圳爱索特工业器材有限公司 | A kind of robot shielding and its application method |
| CN113307601A (en) * | 2021-06-08 | 2021-08-27 | 宋渊 | Lead-free silicon-based ionizing radiation shielding material and manufacturing method and application thereof |
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| US4727257A (en) * | 1986-01-22 | 1988-02-23 | Sergio Grifoni | Shield against radiations |
| FR2846467B1 (en) * | 2002-10-25 | 2005-01-28 | Cogema Logistics | NEUTRONIC SHIELDING AND DE-CRITICITE MAINTAINING MATERIAL, PREPARATION METHOD AND APPLICATIONS THEREOF |
| US7449131B2 (en) * | 2004-10-06 | 2008-11-11 | Terry Industries, Inc. | Techniques and compositions for shielding radioactive energy |
| CN101302367B (en) * | 2008-07-10 | 2011-03-30 | 北京富迪创业科技有限公司 | Anti-neutron size putty |
| CN101430941A (en) * | 2008-12-22 | 2009-05-13 | 中国核动力研究设计院 | Flexible compound radiation shielding material |
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