High-temperature optical sensing material erbium-ytterbium-codoped lead-free fluogermanate glass and preparation method thereof

A lead-free fluorogermanate and optical sensing technology is applied in the field of high-temperature optical sensing materials and optical sensing materials, and can solve the problems of low upper limit temperature of thermal sensing, low temperature measurement sensitivity, low luminous efficiency and the like, Achieve the effect of improving the luminous efficiency of the upper conversion, good glass performance and improving sensitivity

Active Publication Date: 2017-05-31
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-codoped lead-free fluogermanate glass and preparation method thereof
  • High-temperature optical sensing material erbium-ytterbium-codoped lead-free fluogermanate glass and preparation method thereof
  • High-temperature optical sensing material erbium-ytterbium-codoped lead-free fluogermanate glass and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] According to the formula in Table 1, calculate the weight of the corresponding components, weigh each raw material and mix evenly; set the heating rate to 25K / min, put the mixture into a covered platinum crucible and heat up to 1300 °C with the furnace The silicon carbide rod is 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 passed through for atmosphere protection to remove moisture in the glass. After being homogenized and clarified, the water-removed glass liquid 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 and kept for 2 hours; The muffle furnace was lowered to 90° C., then the muffle furnace was closed, and the temperature was lowered to room temperature to obtain an annealed erbium-ytterbium co-doped lead-free fluorogermanate glass.

[0046] The annealed erbium...

Embodiment 2

[0050] According to the formula in Table 1, calculate the weight of the corresponding components, weigh each raw material and mix evenly; set the heating rate to 25K / min, put the mixture into a covered platinum crucible and heat up to 1400 °C with the furnace The silicon carbide rod is melted in an electric furnace for 50 minutes to obtain molten glass. During the glass melting process, high-purity oxygen is always passed through for atmosphere protection to remove moisture in the glass liquid. After being homogenized and clarified, the dehydrated glass liquid is quickly poured into a mold that has been preheated to 520°C, and then quickly placed in a muffle furnace that has been heated to 550°C. The rate is lowered to 90° C., then the muffle furnace is closed, and the temperature is lowered to room temperature to obtain an 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 each raw material and mix evenly; set the heating rate to 25K / min, put the mixture into a covered platinum crucible and heat up to 1350 °C with the furnace The silicon carbide rod is melted in an electric furnace for 45 minutes to obtain molten glass. During the glass melting process, high-purity oxygen is always passed through for atmosphere protection to remove moisture in the glass liquid. After being homogenized and clarified, the water-removed glass liquid 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. The rate was lowered to 95° C., then the muffle furnace was closed, and the temperature was lowered to room temperature to obtain an annealed erbium-ytterbium co-doped lead-free fluorogermanate glass.

[0054] The erbium-ytterbium co-doped lead-free fluorogermanate glass prepared i...

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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, which is suitable for the field of microwave heating temperature measurement. Background technique [0002] Microwave heating is widely used in food processing, material drying, medical disinfection and home cooking because of its high efficiency, fast speed, and the heat generated by the material loss through its own medium. But due to the existence of strong electromagnetic field. The temperature measurement in the microwave field has become a technical problem, resulting in the lack of effective and low-cost temperature detection components in most of the existing microwave heating equipment, making it difficult to control the temperature of microwave heating, resulting in overheating or underheating, affecting the efficiency of microwave heating...

Claims

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Application Information

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Patent Type & Authority Applications(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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