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Fluoride-based stress luminescent material as well as preparation method and application thereof

A technology of stress luminescence and luminescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, and the measurement of the change force of optical properties of materials when they are stressed, which can solve the problems of unclear types of traps, limited types of stress luminescent materials, The mechanism is not clear and other problems, to achieve the effect of excellent luminous performance, low equipment requirements, and environmental friendliness

Active Publication Date: 2021-09-17
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the conversion of mechanical stress to light distribution is very complicated, some experiments have successfully applied the phenomenon of stress luminescence to pressure sensors, mechanical force visualization and other different kinds of intelligent systems, which have attracted worldwide attention, but: 1. The types of stress-luminescent materials known so far are very limited, only seen in some silicates and piezoelectric materials; 2. The mechanism is still unclear; 3. The types of traps have not yet been clarified

Method used

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  • Fluoride-based stress luminescent material as well as preparation method and application thereof
  • Fluoride-based stress luminescent material as well as preparation method and application thereof
  • Fluoride-based stress luminescent material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, prepares Mg 0.98 f 2 : 0.02Mn 2+ Stress glow material.

[0022] According to the chemical formula Mg 0.98 f 2 : 0.02Mn 2+ (Here the doping amount 0.02 is usually written in front of the doping element) In the stoichiometric ratio of each element, take magnesium fluoride and manganese carbonate as raw materials, put the weighed raw materials into an agate mortar, add an appropriate amount of ethanol to make them fully mixed , fully ground to powder state. Put the ground powder in a crucible, put it into a high-temperature atmosphere tube furnace, and calcinate it at 1100°C for 2 hours under a nitrogen protective atmosphere, cool it naturally to room temperature, take it out, and grind it into Mg 0.98 f 2 : 0.02Mn 2+ Stress glow material.

[0023] For the Mg prepared in this embodiment 0.98 f 2 : 0.02Mn 2+ The stress luminescent material is tested by XRD and X-ray emission spectrum, and the results are as follows figure 1 and figure 2 shown. ...

Embodiment 2

[0026] Embodiment 2, preparation Ca 0.98 f 2 : 0.02Mn 2+ Stress glow material.

[0027] According to the chemical formula Ca 0.98 f 2 : 0.02Mn 2+ The stoichiometric ratio of each element in the method is to weigh calcium fluoride and manganese carbonate as raw materials, put the weighed raw materials into an agate mortar, add an appropriate amount of ethanol to make them fully mixed, and fully grind them to a powder state. Put the ground powder in a crucible, put it into a high-temperature atmosphere tube furnace, and calcinate it at 1100°C under an argon protective atmosphere for 2 hours, cool it naturally to room temperature, take it out, and grind it into Ca 0.98 f 2 : 0.02Mn 2+ Stress glow material.

[0028] For the Ca prepared in this example 0.98 f 2 : 0.02Mn2+ The stress luminescent material is tested by XRD and X-ray emission spectrum, and the results are as follows Figure 5 and Figure 6 shown.

Embodiment 3

[0029] Embodiment 3, prepare Mg 0.98 f 2 : 0.02A stress luminescent material.

[0030] According to the above method, the general chemical formula is Mg 0.98 f 2 : 0.02A luminescent material, wherein, A is Bi, Sc, Ti, Mn, Cu, Zn, so a total of six samples were prepared.

[0031] A certain force was applied to the six prepared samples (the force applied here is about the same), and the real photos of the stress luminescence phenomenon of each sample were obtained as shown in Figure 7 shown.

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Abstract

The invention provides a fluoride-based stress luminescent material as well as a preparation method and application thereof. The chemical general formula of the fluoride-based stress luminescent material is M1-xF2: Ax or M1-x-yF2: Bx, Mn 2+y, wherein x is more than or equal to 0 and less than or equal to 0.05, y is more than or equal to 0 and less than or equal to 0.05, and x and y respectively represent molar percentage contents and are not zero at the same time; the M is at least one of alkaline earth metals Mg and Ca; A is Bi or transition metal ions; the transition metal ions are Sc, Ti, Mn, Cu or Zn and the like; and B is at least one of rare earth ions Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and the like. The stress luminescent material is excellent in luminescent property, and new possibility is provided for further research and development of a stress luminescence mechanism.

Description

technical field [0001] The invention relates to the field of novel inorganic luminescent materials, in particular to a fluoride-based stress luminescent material, its preparation method and application. Background technique [0002] As early as the 16th century, the phenomenon of stress luminescence has been discovered by all people. For example, strong light will be emitted during earthquakes or volcanic eruptions. Its earliest record is that Francis Bacon wrote in his book "The Advancement of Learning" in 1605: "When a knife is quickly drawn across the surface of a sugar cube, a flash of light will appear." For many solid materials, when mechanical stress is applied to them, they will emit light. This phenomenon is called stress luminescence (mechanoluminescence (ML) or triboluminescence (TL)). This kind of material that emits light under mechanical stress is called stress luminescence material. . The term stress luminescence was not used until 1978. [0003] In layman'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61G01L1/24
CPCC09K11/616G01L1/241
Inventor 杨艳民张伟宁静静
Owner HEBEI UNIVERSITY