Luminous ZnO-Bi2O3-based voltage-sensitive ceramic material and preparation method thereof

By introducing fluorescent materials ZnO and Er2O3 into ZnO-Bi2O3-based varistor ceramics and combining them with solid-state sintering of MnO2, Sb2O3 and Bi2O3, a multifunctional varistor ceramic with both luminescence and varistor properties was prepared. This solved the problem of insufficient fluorescence performance in the existing technology, achieved excellent coexistence of electrical and luminescence properties, and expanded its application range.

CN120817801APending Publication Date: 2025-10-21YANTAI ADVANCED MATERIALS & GREEN MFG SHANDONG PROVINCIAL LAB
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Patent Information

Application Number
CN202511228034.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-29
Publication Date
2025-10-21

AI Technical Summary

Technical Problem

Existing ZnO-Bi2O3-based varistors, after being doped with rare earth ions, suffer from insufficient fluorescence performance due to the formation of a bismuth-rich phase by bismuth oxide and grain boundary defects, thus failing to exhibit significant photoluminescence properties.

Method used

By introducing fluorescent materials ZnO and Er2O3 into ZnO-Bi2O3-based varistor ceramics, luminescent varistor ceramics are prepared by solid-state sintering. MnO2, Sb2O3 and Bi2O3 are combined as varistor modifiers to form fluorescent centers and regulate the microstructure, achieving the coexistence of luminescence and varistor properties.

Benefits of technology

A multifunctional pressure-sensitive ceramic sheet with both luminescence and pressure-sensitive properties was prepared, with a nonlinear coefficient α as high as 50.18 and an orange-red luminescence color, expanding its application in anti-counterfeiting and marking, intelligent sensing and indication, etc.

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Abstract

The invention belongs to the technical field of voltage-sensitive ceramics, and particularly relates to a luminous ZnO-Bi2O3-based voltage-sensitive ceramic material and a preparation method thereof. The voltage-sensitive ceramic material is prepared from a voltage-sensitive modified material and a fluorescent material through solid-phase sintering, the molar ratio of the voltage-sensitive modified material to the fluorescent material is (1.8-2.8): 100, the voltage-sensitive modified material is MnO2, Sb2O3 and Bi2O3, and the molar ratio of the MnO2 to the Sb2O3 to the Bi2O3 is 0.5: 0.5: (0.8-2.8); the fluorescent material is ZnO and Er2O3, and the doping concentration of the Er2O3 in the fluorescent material is 0.2 mol%-0.6 mol%. According to the invention, a luminescence center is introduced into the ZnO-Bi2O3-based voltage-sensitive ceramic, so that the material is endowed with fluorescence characteristics while the microstructure and performance of the matrix are retained, and the potential application of the voltage-sensitive ceramic in the aspects of anti-counterfeiting and identification, intelligent sensing and indication and the like is expanded.
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