Preparation methods of multi-rare-earth co-doped boride and nano heat insulation powder thereof and application of nano heat insulation powder

A nano-insulation and co-doping technology, applied in metal borides, boron/borides, nanotechnology, etc., can solve the problems of difficult large-scale industrial production, high cost, high energy consumption, and achieve effective thermal energy, good insulation Thermal effect, low energy consumption effect

Active Publication Date: 2020-06-16
TIANJIN BAOGANG RES INST OF RARE EARTHS +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At present, the cost of nano-synthesis of rare earth borides is high and the output is low, so it is difficult to produce on a large scale
The traditional sintering method of rare earth boride micron powder needs to be synthesized at a high temperature above 1000°C, and the energy consumption is high

Method used

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  • Preparation methods of multi-rare-earth co-doped boride and nano heat insulation powder thereof and application of nano heat insulation powder
  • Preparation methods of multi-rare-earth co-doped boride and nano heat insulation powder thereof and application of nano heat insulation powder
  • Preparation methods of multi-rare-earth co-doped boride and nano heat insulation powder thereof and application of nano heat insulation powder

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Multi-rare earth co-doped borides, the chemical formula is La 0.6 Eu 0.4 B 6 .

[0055] The preparation method of the above multi-rare earth co-doped boride is as follows: drying the rare earth source in an oven at 180° C. for 3 hours, and drying the boron source at 190° C. for 60 minutes. The dried rare earth source, boron source and additives were mixed and ball milled for 2 hours. The mixed raw materials were placed in a microwave experimental furnace, the temperature was raised to 700°C, kept for 6 hours, and cooled to room temperature with the furnace. The synthesized powder was repeatedly leached with dilute hydrochloric acid at 90°C, rinsed with distilled water and suction-filtered, and vacuum-dried to obtain the multi-rare earth co-doped boride powder. Among them, the content of rare earth source, boron source and additives is:

[0056] Rare earth source 301 parts by weight;

[0057] 324 parts by weight of boron source;

[0058] 195 parts by weight of auxi...

Embodiment 2

[0068] Multi-rare earth co-doped boride, its chemical formula is Gd 0.7 Ce 0.3 B 6 .

[0069] The preparation method of the above multi-rare earth co-doped boride is: drying the rare earth source mixture in an oven at 150° C. for 2 hours, and drying the boron source at 200° C. for 80 minutes. The dried rare earth source, boron source and additives were mixed and ball-milled for 2 hours, and the mixed raw materials were placed in a microwave experimental furnace, the temperature was raised to 600°C, kept for 8 hours, and cooled to room temperature with the furnace. The synthesized powder was repeatedly leached with dilute hydrochloric acid at 80°C, rinsed with distilled water and suction-filtered, and vacuum-dried to obtain the multi-rare earth co-doped boride powder. Among them, the contents of rare earth source, boron source and additives are as follows:

[0070] Rare earth oxide mixture 172 parts by weight;

[0071] 143 parts by weight of boron source;

[0072] 135 par...

Embodiment 3

[0082] Multi-rare earth co-doped borides, whose chemical formula is La 0.9 Gd 0.1 B 6 .

[0083] The preparation method of the above multi-rare earth co-doped boride is as follows: drying the rare earth source in an oven at 180° C. for 3 hours, and drying the boron source at 190° C. for 60 minutes. The dried rare earth source, boron source and additives were mixed and ball milled for 2 hours. The mixed raw materials were placed in a microwave experimental furnace, the temperature was raised to 800°C, kept for 8 hours, and cooled to room temperature with the furnace. The synthesized powder was repeatedly leached with dilute hydrochloric acid at 90°C, rinsed with distilled water and suction-filtered, and vacuum-dried to obtain the multi-rare earth co-doped boride powder. Among them, the content of rare earth source, boron source and additives is:

[0084] Rare earth source 458 parts by weight;

[0085] 485 parts by weight of boron source;

[0086] 234 parts by weight of auxi...

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Abstract

The invention provides preparation methods of a multi-rare earth co-doped boride and nano thermal insulation powder thereof and an application of the nano heat insulation powder. The chemical formulais R<x>R'<1-x>B6, wherein R and R' are different rare earth elements, B is boron element, x is greater than 0 and less than 1, and R and R' are selected from two of praseodymium, dysprosium, lanthanum, cerium, rubidium, ytterbium, europium, gadolinium or yttrium. According to the multi-rare-earth co-doped boride, due to doping of multiple rare earth, spectral absorption waves of the material are subjected to red shift, a better heat insulation effect is achieved; and the preparation method adopts a microwave solid phase method, so that the powder granularity is smaller and can reach hundred nanometers or below.

Description

technical field [0001] The invention belongs to the field of energy-saving and environment-friendly materials, and in particular relates to a poly-rare-earth co-doped boride and a preparation method thereof, a high-permeability rare-earth nano heat insulation powder containing the poly-rare-earth co-doped boride, a preparation method and an application thereof. Background technique [0002] In recent years, more and more attention has been paid to the issue of energy shortage, and energy conservation and emission reduction have become the main theme of the times. According to statistics, nearly 1 / 3 of global greenhouse gas emissions are related to building energy consumption. For occasions where a large amount of glass is used, such as building windows, ceilings, and car windows, the thermal radiation of light will lead to a substantial increase in energy consumption. There are many new glass products on the market, such as insulating glass, Low-e glass, etc., but they are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/04C08K3/38C09J123/08C09J11/04C09D7/61C09J129/14B82Y30/00B82Y40/00
CPCC01B35/04C08K3/38C09J123/0853C09J11/04C09D7/61C09J129/14B82Y30/00B82Y40/00C08K2201/011C01P2002/72C01P2004/64
Inventor 李璐尹健温永清邓冠南秦晓婷张日成段西健张呈祥张秀荣鲁飞孙良成刘小鱼
Owner TIANJIN BAOGANG RES INST OF RARE EARTHS
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