Borosilicate matrix glass material for microchannel plate and preparation method thereof

Abstract

The invention discloses a borosilicate matrix glass material for a microchannel plate and a preparation method thereof, the borosilicate matrix glass material for the microchannel plate comprises core glass and skin glass, the skin glass comprises SiO2, B2O36, Al2O3, Na2O, K2O and CaO; and the core glass is prepared from the following components: SiO2, B2O3, BaCO3, La2O3, Al2O3 and ZnO. According to the present invention, the formula is reasonable, hazardous chemicals such as lead are replaced, environmental pollution is reduced, the core material glass can be subjected to high-speed acid dissolution without residue, the skin material glass has advantages of good corrosion resistance, good mechanical property, MCP deformation resistance, good structure uniformity and good pore diameter precision, the raw materials are easily available, the cost is not high, the melting and the forming are easy, and the production and preparation efficiency is high.

Description

technical field [0001] The invention relates to the technical field of glass materials, in particular to a borosilicate matrix glass material for a microchannel plate and a preparation method thereof. Background technique [0002] In the field of photomultiplication technology, single-channel electron multiplication devices can only be used to detect electrons, neutrons, etc., X-rays, r-rays, energetic particles, etc., while two-dimensional arrays of electron multiplication display microchannel plates (MCP) It is composed of tens of thousands of hollow glass capillaries closely arranged in parallel to each other, and it is an element that multiplies electrons distributed in two-dimensional space. Each microhole in the plate, that is, a channel, is a miniature electron multiplier device. It can be used to detect and amplify photoelectric images, the more channels in the board (each channel is a pixel), the more pixels, the clearer the image. Due to the characteristics of hig...

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Problems solved by technology

[0007] 1. MCP deformation problem: a series of hot processing and cold processing operations such as high-temperature hydrogen combustion, it is very difficult to require MCP not to be broken or deformed, especially after the hole diameter becomes smaller, the board is getting thinner and thinner, as long as any cold processing or hot processing During the process, the residual stress in the glass in the plate is not completely removed, and when the stress exceeds the mechanical strength of the plate, the plate will be broken or deformed, and the MCP will be scrapped, especially after hydrogen burning at high temperature, the skin glass will be reduced to precipitate metal. Pb and Bi, glass properties change drastically, the smaller the pore size, the greater the change, and the more serious the MCP deformation

[0008] 2. The problem of acid solubility of MCP core material glass: due to the refinement of the channel, the rate of residue discharge decreases when the core glass is acid-etched, which increases the acid-dissolving time of the core glass and increases the erosion of the skin glass, resulting in unevenness inside the micro-channel , the smoothness of the micropore inner wall reduces the adsorption of residual gas and impurities, affecting normal use

[0009] 3. The problem of toxic components of the traditional MCP matrix glass: a large amount of compounds composed of Pb, Bi and other elements are introduced into the traditional glass components, and there are many toxic and harmful gases and dust in the glass preparation process, which causes great harm to the human body and the environment. , and the traditional glass components contain a large amount of alkali metal ions, which will cause the poisoning of the tube due to the migration of alkali metal ions

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