阅读说明：本技术 一种碲酸盐掺杂闪烁光纤及其制备方法 (tellurate doped scintillating fibers and preparation method thereof ) 是由 尹士玉 王昊 郭红阳 于 2019-11-21 设计创作，主要内容包括：本发明提供了一种碲酸盐掺杂闪烁光纤及其制备方法,通过掺杂碲酸盐和热处理的工艺方法,可进一步增大碲酸盐的温度无关性和法拉第效应,有效提高纤芯的产光能力,同时通过不含硅、不含钇铝石榴石的碲酸盐玻璃材料作为包层,可有效提高拉伸性能、同时可避免二氧化硅渗入纤芯而影响产光能力,从而从侧面提高纤芯的产光性能。该闪烁光纤具有拉伸性能好、产光能力强、衰减快、密度大等优点,能提高能量分辨率以及高吸收射线能量,光产额高达20000Photon/MeV；同时可拉伸至纤芯直径达到10～100μm,拉伸后的空间分辨率可达到30lp/mm,可以满足不同的成像需求,适合应用于高能物理核探测和放射医学等领域中。(The invention provides tellurate-doped scintillating fibers and a preparation method thereof, wherein the temperature independence and Faraday effect of tellurate can be further increased steps by the tellurate-doped and heat treatment process method, the light generating capacity of a fiber core is effectively improved, meanwhile, the tensile property can be effectively improved by taking a tellurate glass material which does not contain silicon and yttrium-aluminum garnet as a cladding, and the influence of silica penetrating into the fiber core on the light generating capacity can be avoided, so that the light generating capacity of the fiber core is improved from the side.)

1, tellurate-doped scintillating fibers, which is characterized in that the scintillating fibers comprise fiber cores and cladding layers coated on the outer sides of the fiber cores, and the fiber cores comprise the following components⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)Wherein m is more than 0 and less than or equal to 1, and n is more than 0 and less than or equal to 1; the composition of the cladding is xTeO₂yPbOzB₂O₃Wherein x is 0.8-0.85, y is 0.13-0.14, and z is 0.01-0.02.

2. The tellurate-doped scintillating fiber of claim 1, wherein m is 0.5 and n is 0.5, and the fiber core has the composition of⁶Li_0.2:Ce_0.2Lu₂B_0.2PbTeSi₂O₈。

3. The tellurate-doped scintillating fiber of claim 1, wherein m is 0.5 and n is 1, and the fiber core has the composition of⁶Li_0.2:Ce_0.2Lu₂B_0.2PbTe₂Si₂O₁₀。

4. The tellurate-doped scintillating fiber of claim 1, wherein m is 1 and n is 1, and the fiber core has the composition of⁶Li_0.1:Ce_0.1LuB_0.1PbTeSiO₄。

5. The tellurate-doped scintillating fiber of claim 1, wherein x is 0.85, y is 0.14, and z is 0.01, and wherein the composition of the cladding is 0.85TeO₂0.14PbO0.01B₂O₃。

6. The tellurate-doped scintillating fiber of claim 1, wherein x is 0.8, y is 0.13, and z is 0.02, and the composition of the cladding is 0.8TeO₂0.13PbO0.02B₂O₃。

7. The tellurate-doped scintillating fiber of claim 1, wherein x is 0.8, y is 0.14, and z is 0.01, and wherein the composition of the cladding is 0.8TeO₂0.14PbO0.01B₂O₃。

8. The tellurate-doped scintillating fiber of any one of claims 1 to 7, , wherein the tellurate-doped scintillating fiber is characterized in that⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)The preparation method comprises the following steps:

weighing TeO in proportion₂、PbO、B₂O₃、Ce₂(C₂O₄)₃、Li₂CO₃And LSO, heating to 900-950 ℃ for melting, and preserving heat for 180 min;

the xTeOyPbOzB₂O₃The preparation method comprises the following steps:

weighing TeO in proportion₂、PO₂And B₂O₃Heating to 600-650 deg.C for meltingDissolving, and keeping the temperature for 180 min.

9, A method for preparing the tellurate doped scintillating fiber according to any of claims 1 to 7, which is characterized by comprising the following steps:

s1: will be described in⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)Is cut into a cylindrical rod shape as the core, and the xTeO is coated outside the core₂yPbOzB₂O₃The inner diameter of the cladding is matched with the outer diameter of the fiber core, and the end of the cladding is rolled up and drawn into a cone by an MCDV machine tool to form an optical fiber preform;

s2: and inserting the tapered end of the optical fiber preform into a graphite furnace, heating to 1100-1200 ℃, and drawing to obtain a finished product with the fiber core diameter of 80-100 mu m and the glass cladding diameter of 100-200 mu m, namely the scintillating optical fiber.

10. Use of the tellurate-doped scintillating fiber of any one of claims 1 to 7, wherein is used for testing neutrons.

Technical Field

The invention belongs to the technical field of scintillation materials, and particularly relates to tellurate-doped scintillation fibers for testing neutrons and a preparation method thereof.

Background

The scintillation material is used as the most important optical sensor material in a radiation detection system, and is applied to fields of high-energy physics, nuclear physics, celestial physics, geophysical, medical imaging, industrial flaw detection, safety detection and the like in recent years.

For example, plastic optical fiber is limited in material, has the defects of limited radiation absorption, easy aging, incapability of being applied in high-temperature environment and the like, and quartz scintillation optical fiber has strong radiation resistance and can be used at high temperature, but the light yield is low, and the universal application is difficult to obtain.

However, due to the limitations of the performance of single crystal materials and the drawing process, the diameter of the drawn optical fiber is in the millimeter level, the size of the drawn optical fiber is large, and the requirement of high-pixel imaging cannot be met.

Disclosure of Invention

In order to solve the technical problems, the invention provides tellurate doped scintillating fibers and a preparation method thereof.

The specific technical scheme of the invention is as follows:

the aspect of the invention provides tellurate-doped scintillating fibers, and the scintillating light isThe fiber comprises a fiber core and a cladding coated on the outer side of the fiber core, wherein the fiber core comprises the following components⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)Wherein m is more than 0 and less than or equal to 1, and n is more than 0 and less than or equal to 1; the composition of the cladding is xTeO₂yPbOzB₂O₃Wherein x is 0.8-0.85, y is 0.13-0.14, and z is 0.01-0.02.

step, the⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)The preparation method comprises the following steps:

weighing TeO in proportion₂、PbO、B₂O₃、Ce₂(C₂O₄)₃、Li₂CO₃And LSO, heating to 900-950 ℃ for melting, and preserving heat for 180 min.

LSO (molecular structure shown in figure 1) is nano-sized lutetium silicate scintillation powder and is a decisive component for endowing the fiber core with scintillation performance.

Step , the xTeO₂yPbOzB₂O₃The preparation method comprises the following steps:

weighing TeO in proportion₂、PO₂And B₂O₃Heating to 600-650 ℃ for melting, and keeping the temperature for 180 min.

In another aspect, the invention provides a method for preparing the tellurate doped scintillating fiber, which comprises the following steps:

s1: will be described in⁶Li_0.1:CeLuBPb_mTe_nSiO_(3+m+n)Is cut into a cylindrical rod shape as the core, and the xTeO is coated outside the core₂yPbOzB₂O₃The inner diameter of the cladding is matched with the outer diameter of the fiber core, and the end of the cladding is rolled up and drawn into a cone by an MCDV machine tool to form an optical fiber preform;

s2: and inserting the tapered end of the optical fiber preform into a graphite furnace, heating to 1100-1200 ℃, and drawing to obtain a finished product with the fiber core diameter of 80-100 mu m and the glass cladding diameter of 100-200 mu m, namely the scintillating optical fiber.

The invention also provides the application of the tellurate doped scintillating fiber in neutron testing.

The invention has the beneficial effects that tellurate-doped scintillating fibers and a preparation method thereof are provided, the temperature independence and Faraday effect of tellurate can be further increased by the tellurate-doped and heat treatment process method, the light production capability of a fiber core is effectively improved, the tensile property can be effectively improved by using a silicon-free and yttrium aluminum garnet-free tellurate glass material as a cladding, the influence of silica penetrating into the fiber core on the light production capability can be avoided, and the light production capability of the fiber core is improved from the side.

Drawings

FIG. 1 is the spatial structure of an LSO molecule;

FIG. 2 is a schematic structural diagram of a scintillating fiber provided by the present application, in which 1 is a fiber core, 2 is a cladding, and 3 is a plastic protective layer;

FIG. 3 is a cross-sectional view in the radial direction of a scintillating optical fiber provided by the present application in a scintillating state under X-ray irradiation;

FIG. 4 is a cross-sectional view of the angle of FIG. 3 rotated 90 clockwise;

fig. 5 is a perspective view of a scintillating optical fiber provided by the present application in a scintillating state under X-ray irradiation.

Detailed Description

Where applicable, the contents of any patent, patent application, or publication referred to in this application are hereby incorporated by reference in their entirety for all purposes, and the equivalents thereof are also incorporated by reference for all purposes, especially as to the definitions of synthetic techniques, products, and process designs, etc. in this application, if the definitions of specific terms disclosed in the prior art and provided in this application are not , the definitions of terms provided in this application shall control.

The present invention will be further described in with reference to the accompanying drawings and the following examples, wherein the optical fiber products obtained from the examples can be coated with plastic protective layers (as shown in fig. 2) to prevent the optical fiber products from being damaged, thereby ensuring the performance and prolonging the service life.