Semiconductor glass for manufacturing microchannel plate

Abstract

The invention discloses semiconductor glass for manufacturing a microchannel plate. The semiconductor glass comprises the following components in percentage by mass: 60-75 percent of (P2O5+V2O5), 5-25 percent of (FeO+WO3), not more than 4 percent of Sb2O3 and not less than 15 percent of PbO. The semiconductor glass has the advantages that a chemical composition which is stable in glass state and accords with the manufacture requirement of the microchannel plate can be obtained, therefore, the more ideal semiconductor glass of the microchannel plate is formed; the wetting property and the erosion degree to a mullite refractory crucible can be remarkably reduced, corrosion resistance degree in acid treatment in a process of manufacturing the microchannel plate can be improved; the hardness is improved, and the grinding and polishing quality of subsequent processes is ensured; the stability of a transition metal ion valence state in the semiconductor glass can be ensured; and the requirement of the microchannel plate that a semiconductor glass material bulk resistor must be in a range of 5*10<7>-5*10<9>omega can be met.

Description

technical field [0001] The invention belongs to the technical field of semiconductor glass, and in particular relates to a semiconductor glass used for manufacturing microchannel plates. Background technique [0002] The above-mentioned microchannel plate is a photomultiplier element made of glass fiber, with a radius of 20-200mm and a thin disc with a thickness of 0.3-2.0mm (it can also be made into a rectangular or square sheet). There are millions of micro-channels with an aperture of 5-25 μm arranged in parallel on the micro-channel board, which is widely used in low-light night vision devices, X-ray image intensifiers, single-photon counters, and photon, electronic, sub- Detection of atomic particles, etc. [0003] After a certain voltage is applied on both sides of the microchannel plate, an axial electric field will be generated in each channel, that is, the aforementioned microchannel, so that each electron or photon entering the channel collides with the channel wa...

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Problems solved by technology

[0005] US Patent US6103648 discloses the composition of the bulk conductive glass and the chemical composition of the fiber %: P 2 O 5 38-55%, V 2 O 5 12-33%, FeO10-20% and PbO16-19 (for details, please refer to column 6 of the patent specification 45 to 49 lines), this patent scheme abandons the lead silicate glass, and can eliminate the deficiency of the aforementioned CN10193765A due to the use of semiconductor glass that can conduct electricity itself, but there are still the following shortcomings: it has not yet stipulated that it is suitable for the manufacture of microchannel plates. The glass composition range needs to be adjusted to achieve the glass resistance required by the bulk conductance microchannel plate (between 5×10 7 and 5×10 9 ), And within this composition range, the glass state is stable (no crystallization) and the resistance performance is stable; at the same time, it reduces the erosion of the mullite refractory crucible container during the glass melting process; it also improves the acid treatment in the process of manufacturing microchannel plates In the process, the corrosion resistance of the glass; and the final process of the manufacturing process or the grinding and polishing process of the final process increases the hardness of the glass and improves the quality of grinding and polishing; in addition, the composition of the glass should be adjusted to make the transition metal ion in the semiconductor glass State stable