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Synthesizing and application methods of sodium zirconate

A synthesis method, sodium zirconate technology, applied in zirconium compounds, separation methods, chemical instruments and methods, etc., can solve problems such as sintering and rapid decline in adsorption capacity, achieve cost savings, realize reduction and resource utilization, and promote Effect of pyrolysis hydrogen production process

Active Publication Date: 2019-04-05
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

in the existing CO 2 Among solid adsorbents, CaO adsorbent is one of the most studied adsorbents because of its high adsorption capacity and large storage capacity, but CaO also has some disadvantages, such as easy sintering during multiple cycles. phenomenon, thus making its effect on CO 2 The adsorption capacity drops rapidly

Method used

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  • Synthesizing and application methods of sodium zirconate
  • Synthesizing and application methods of sodium zirconate
  • Synthesizing and application methods of sodium zirconate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weighed 1.1476g of sodium carbonate solid and 1.4389g of crown material waste. After X-ray fluorescence (XRD) analysis of the crown material waste, it was found that the zirconia content was 92.53%. After mixing, they were placed in a ball mill for ball milling. The rotational speed of the ball mill was 500 rpm. The ball milling time is 2h. The resulting powder is then calcined in a muffle furnace. The calcination procedure in the muffle furnace is to raise the temperature from 20°C to 850°C, and calcine at a constant temperature of 850°C for 6h. The product can be obtained.

Embodiment 2

[0043] Weigh 1.3779g of sodium carbonate solid and 1.4389g of dental crown material waste. After X-ray fluorescence (XRF) analysis of the dental crown material waste, it can be known that the zirconia content is 92.53%, and they are mixed and placed in a ball mill for ball milling . The rotational speed of the ball mill was 550 rpm. The ball milling time is 1.5h. The resulting powder is then calcined in a muffle furnace. The calcination temperature in the muffle furnace was 800°C, and the calcination was carried out at a constant temperature of 800°C for 5h. The product can be obtained.

Embodiment 3

[0045] Weighed 1.1476g of sodium carbonate powder and 1.4389g of crown material waste. After X-ray fluorescence (XRF) analysis of the crown material waste, it was found that the zirconia content was 92.53%, and then the obtained powder was calcined. The calcination temperature is 750°C, and the calcination is carried out at a constant temperature of 750°C for 8 hours. The product can be obtained.

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Abstract

The invention discloses synthesizing and application methods of sodium zirconate and belongs to the field of resource utilization of solid wastes. The synthesizing method of the sodium zirconate comprises the following steps of (1) mixing YSZ (yttria-stabilized zirconia) solids and sodium carbonate solids at a certain weight; (2) calcinating the products obtained in the step (1) at a temperature of 750-850 DEG C for 5-8 hours. The synthesizing method of the sodium zirconate can not only complete recycling of dental crown material wastes to achieve reduction and resource utilization of solid dental wastes, but also synthesize the sodium zirconate in a simple and easily-operated mode, which can serve as a carbon dioxide absorbent with good carbon dioxide absorbency or be applied to pyrolysishydrogen production of biomass and biomass waste.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, in particular to a synthesis method and application of sodium zirconate. Background technique [0002] Zirconium dioxide can be used to produce dental crown materials because of its high hardness, good chemical stability, corrosion resistance, high mechanical strength and good biocompatibility. Also because of the high strength, high safety and natural color of the crown made of zirconia, it is deeply loved by many patients. At room temperature, zirconia is a monoclinic phase, which is not suitable for the production of dental crowns, so it needs to be stabilized with yttrium oxide at a concentration of 3% by mole to obtain square zirconia, represented by YSZ , and then the YSZ disc was processed by CAD / CAM (Computer-Aided Design and Computer-Aided Manufacturing) to prepare the desired crown. The CAD / CAM method leaves 30 percent of the YSZ powdery waste residue. YSZ is not a hazardous mate...

Claims

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Application Information

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IPC IPC(8): C01G25/00B01J20/04B01D53/02C01B3/22
CPCB01D53/02B01D2257/504B01J20/04C01B3/22C01G25/00C01P2002/72C01P2002/80Y02C20/40Y02P20/151Y02W30/20
Inventor 赵明王凡梅蒙·穆罕默德·扎基·哈桑
Owner TSINGHUA UNIV
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