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High-temperature optical sensing material Erbium-ytterbium co-doped lead-free fluorogermanate glass and preparation method thereof

A lead-free fluorogermanate and optical sensing technology, which is applied in the field of optical sensing materials and high-temperature optical sensing materials, can solve the problems of low upper limit temperature of thermal sensing, low temperature measurement sensitivity, high phonon energy, etc. , to achieve the effect of improving the luminous efficiency of uploading and switching, good glass performance and easy preparation

Active Publication Date: 2019-12-13
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with previous erbium-doped optical glass sensing materials, this material overcomes fluoride sulfide glass (poor thermal stability, low upper limit temperature of thermal sensing) and silicon (borate) glass (higher temperature) Phonon energy, low luminous efficiency, low temperature measurement sensitivity) as the inherent shortcomings of optical sensing materials, provide a suitable matrix material for optical temperature sensors

Method used

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  • High-temperature optical sensing material Erbium-ytterbium co-doped lead-free fluorogermanate glass and preparation method thereof
  • High-temperature optical sensing material Erbium-ytterbium co-doped lead-free fluorogermanate glass and preparation method thereof
  • High-temperature optical sensing material Erbium-ytterbium co-doped lead-free fluorogermanate glass and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] According to the formula in Table 1, calculate the weight of the corresponding components, weigh the raw materials and mix them evenly; set the heating rate to 25K / min, put the mixture into the covered platinum crucible and heat up to 1300℃ with the furnace The silicon carbide rods are melted in an electric furnace for 40 minutes to obtain molten glass. During the glass melting process, high-purity oxygen (purity higher than 99.995%) is always introduced for atmosphere protection to remove moisture in the molten glass. After being homogenized and clarified, the glass liquid with moisture removed is quickly poured into a mold that has been preheated to 500°C, and then quickly placed in a muffle furnace that has been heated to 540°C for 2 hours; The rate of the muffle furnace is reduced to 90 ℃, and then the muffle furnace is closed, and the temperature is reduced to room temperature to obtain the annealed erbium-ytterbium co-doped lead-free fluorogermanate glass.

[0046] T...

Embodiment 2

[0050] According to the formula in Table 1, calculate the weight of the corresponding components, weigh the raw materials and mix them evenly; set the heating rate to 25K / min, put the mixture into a covered platinum crucible and heat up to 1400 ℃ with the furnace The silicon carbide rods are melted in an electric furnace for 50 minutes to obtain molten glass. During the glass melting process, high-purity oxygen is always introduced to protect the atmosphere to remove moisture in the molten glass. After being homogenized and clarified, the glass liquid with moisture removed is quickly poured into a mold preheated to 520°C, and then quickly placed in a muffle furnace that has been heated to 550°C, kept for 3 hours, and then heated at 11°C / hour The rate is reduced to 90°C, then the muffle furnace is closed, and the temperature is lowered to room temperature to obtain annealed erbium-ytterbium co-doped lead-free fluorogermanate glass.

Embodiment 3

[0053] According to the formula in Table 1, calculate the weight of the corresponding components, weigh the raw materials and mix them evenly; set the heating rate to 25K / min, put the mixture into a covered platinum crucible and heat up to 1350℃ with the furnace The silicon carbide rods are melted in an electric furnace for 45 minutes to obtain molten glass. During the glass melting process, high-purity oxygen is always introduced to protect the atmosphere to remove moisture in the molten glass. After homogenizing and clarifying the water-removed liquid glass, it is quickly poured into a mold that has been preheated to 510°C, and then quickly placed in a muffle furnace that has been heated to 545°C, kept for 2.5 hours, and then heated at 10°C / hour The rate is reduced to 95°C, then the muffle furnace is turned off, and the temperature is lowered to room temperature to obtain annealed erbium-ytterbium co-doped lead-free fluorogermanate glass.

[0054] The erbium-ytterbium co-doped ...

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Abstract

The invention discloses a high-temperature optical sensing material, i.e., erbium-ytterbium-codoped lead-free fluogermanate glass. Through adding erbium and ytterbium ions into fluogermanate glass, high doping of the erbium and ytterbium ions in the fluogermanate glass can be achieved, the energy utilization efficiency and luminescence efficiency of pumping can be further increased, high-sensitive temperature sensing can be achieved in relatively short optical fibers, and the practicability of temperature sensors is improved. Compared with the former erbium-doped optical glass sensing materials, the erbium-ytterbium-codoped lead-free fluogermanate glass disclosed by the invention has the advantages that inherent disadvantages of fluoride glass, sulfide glass and silicate (borate) glass as optical sensing materials are overcome, the working ceiling temperature and temperature sensing sensitivity are relatively high, and the erbium-ytterbium-codoped lead-free fluogermanate glass can be extensively applied to the field of microwave heating and temperature measurement through being made into optical fibers.

Description

Technical field [0001] The invention relates to an optical sensing material, in particular to a high-temperature optical sensing material erbium-ytterbium co-doped lead-free fluorogermanate glass and a preparation method thereof, and is suitable for the field of microwave heating temperature measurement. Background technique [0002] Microwave heating is widely used in the fields of food processing, material drying, medical disinfection and household cooking due to its high efficiency, fast speed, and heat dissipation of materials through its own medium. But due to the existence of strong electromagnetic fields. This makes temperature measurement in the microwave field a technical problem. As a result, most of the existing microwave heating equipment lacks effective and low-cost temperature detection components, making it difficult to control the temperature of microwave heating, resulting in excessive or insufficient heating, which affects microwave heating. effect. [0003] Bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/04C03C3/253C09K11/86
CPCC03C3/253C03C4/04C09K11/7775
Inventor 田颖井绪峰李兵朋黄飞飞徐时清张军杰
Owner CHINA JILIANG UNIV
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