Ceramic scintillator array and its preparation method

A technology of scintillator and ceramic powder, which is applied in the field of detectors, can solve problems such as inability to emit light, and achieve the effects of strong optical signal, improved light emission efficiency, and increased light emission efficiency

Active Publication Date: 2018-07-24
宁波虔东科浩光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the figure that due to light reflection, a large part of the light transmitted in the scintillator array is reflected back to the scintillator array and cannot be emitted.

Method used

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  • Ceramic scintillator array and its preparation method
  • Ceramic scintillator array and its preparation method
  • Ceramic scintillator array and its preparation method

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preparation example Construction

[0059] The present invention also provides a method for preparing a ceramic scintillator array, which can be used to prepare the above-mentioned ceramic scintillator array, comprising the following steps:

[0060] S100: Prepare a plurality of ceramic scintillator units.

[0061] The ceramic scintillator element can be directly prepared from the ceramic powder, including the following steps: preparing the ceramic powder according to the composition ratio of the ceramic scintillator element, grinding, mixing and drying the prepared ceramic powder; Ceramic powder through such as Figure 7 The shown unit preparation mold 200 is press-molded to obtain a plurality of ceramic scintillator unit green bodies; after sintering the plurality of ceramic scintillator unit green bodies, a plurality of ceramic scintillator unit units are obtained. This method is simple to prepare and does not require mechanical cutting, and since each ceramic scintillator unit is independent of each other, d...

Embodiment 1

[0076] (1) Preparation of ceramic scintillator elements

[0077] The matrix of the ceramic scintillator element is Y 3 al 5 o 12 Transparent ceramics, the active ion is Ce 3+ , and Ce 3+ The doping amount is 0.00005% of the molar weight of the matrix.

[0078] The preparation process is as follows: prepare ceramic powder according to the composition ratio of the ceramic scintillator element; grind, mix and dry the ceramic powder; select a suitable element to prepare a mold, and place the dried ceramic powder in the first powder in the body containing cavity; covering the element pressing plate on the first powder containing cavity and applying a certain pressure to obtain a plurality of ceramic scintillator element green bodies. A plurality of green ceramic scintillator elements are placed in a high-temperature furnace, sintered at 1750° C. for 10 h, and taken out after cooling to obtain a plurality of columnar ceramic scintillator elements. The cross section of each cer...

example 2

[0084] (1) Preparation of ceramic scintillator elements

[0085] The matrix of the ceramic scintillator element is selected from Lu 3 al 5 o 12 Transparent ceramics, the active ion is Pr 3+ , and Pr 3+ The doping amount is 0.1% of the molar weight of the matrix.

[0086] The preparation process is as follows: prepare the ceramic powder according to the composition ratio of the ceramic scintillator element; grind, mix and dry the ceramic powder; select a suitable element to prepare a mold (the bottom of the first powder storage cavity is concave), The dried ceramic powder is placed in the first powder storage cavity; the base unit pressing plate is covered on the first powder storage cavity, and a certain pressure is applied to obtain a plurality of ceramic scintillator base unit green bodies. A plurality of green ceramic scintillator elements were placed in a high-temperature furnace, sintered at 1800° C. for 5 hours, and taken out after cooling to obtain a plurality of c...

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Abstract

The invention discloses a ceramic scintillator array, which comprises a plurality of ceramic scintillator elements arranged in an array structure; the light-emitting surface of each ceramic scintillator element is rough. The light emitting surface of the ceramic scintillator array of the present invention has higher light emitting efficiency, therefore, the optical signal received by the photon detection device is stronger, which is conducive to improving the final imaging quality; and the improvement of the light emitting efficiency can reduce the The difficulty of receiving and processing the terminal signal reduces the manufacturing cost of the detector matching equipment. At the same time, the invention also provides a preparation method of the ceramic scintillator array. In the method, the surface of the light emitting surface of the ceramic scintillator unit is roughened, thereby improving the light emitting efficiency of the ceramic scintillator array.

Description

technical field [0001] The invention relates to the field of detectors, in particular to a ceramic scintillator array and a preparation method thereof. Background technique [0002] The scintillation detector converts high-energy rays (X / γ-rays, etc.) A device in which information is presented as a digital signal. At present, scintillation detectors have been widely used in medical, national defense, security inspection and other fields. The core functional component of the scintillation detector is the scintillator array, which is the conversion medium of high-energy rays and light signals. Such as figure 1 Shown is the propagation path of light on the light exit surface of a conventional scintillator array. It can be seen from the figure that due to light reflection, a large part of the light transmitted in the scintillator array is reflected back to the scintillator array and cannot be emitted. [0003] Improving the light output efficiency will on the one hand reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/20
Inventor 秦海明肖哲鹏蒋俊刘永福江浩川
Owner 宁波虔东科浩光电科技有限公司
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