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Method for preparing barium zirconate crucible by slip casting

A technology of grouting molding and barium zirconate, which is applied in the field of high-temperature solid electrolyte materials, can solve the problems of difficult sintering of high-purity and high-density barium zirconate crucibles, and achieve the effect of cheap raw materials, low cost and high strength

Inactive Publication Date: 2014-08-13
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a barium zirconate crucible by grouting in order to solve the problem that a high-purity and high-density barium zirconate crucible is difficult to sinter

Method used

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  • Method for preparing barium zirconate crucible by slip casting
  • Method for preparing barium zirconate crucible by slip casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 500 grams of barium zirconate powder calcined at 1600°C for 8 hours, add 30wt% deionized water, ball mill for 24 hours, and then dry in an oven at 80°C. Add 15wt% deionized water and 10wt% gum arabic solution to the dried powder, mix and ball mill for 2 hours, and pass through a 200-mesh sieve to remove large particles of impurities that may be contained in the slurry to obtain a pouring slurry. Then add the slurry in a plaster mold of a certain shape, and after the thickness reaches 2mm, pour out the remaining slurry. Place the gypsum mold for a period of time, then remove the mold, pour out the green body, dry it in an oven at 30°C, trim the green body after reaching a certain level, and finally dry it naturally at room temperature. Place the formed dry biscuit sample in a muffle furnace, raise the temperature to 1640°C at a rate of 2°C / min in an air atmosphere, and keep it warm for 10 hours to obtain a barium zirconate crucible.

[0023] figure 1 is the fract...

Embodiment 2

[0025] Weigh 500 g of barium zirconate powder calcined at 1600 °C for 10 h, add 30 wt % deionized water, ball mill for 24 hours, and then dry in an oven at 80 °C. Add 15wt% deionized water and 10wt% gum arabic solution to the dried powder, mix and ball mill for 5 hours, and pass through a 200-mesh sieve to remove large particles of impurities that may be contained in the slurry to obtain a pouring slurry. Then add the slurry in a plaster mold of a certain shape, and after the thickness reaches 10mm, pour out the remaining slurry. Place the gypsum mold for a period of time, then remove the mold, pour out the green body, dry it in an oven at 30°C, trim the green body after reaching a certain level, and finally dry it naturally at room temperature. Place the formed dry green body sample in a muffle furnace, raise the temperature to 1750°C at a rate of 2°C / min in an air atmosphere, and keep it warm for 10 hours to obtain a barium zirconate crucible.

[0026] figure 2 Barium zir...

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Abstract

The invention discloses a method for preparing a barium zirconate crucible by slip casting, comprising the following steps: a) calcining a commercial barium zirconate powder; b) carrying out ball milling on the calcined powder for 24h and drying for later use; c) adding distilled water and a solution of Arabic gum into the dried powder, mixing for 2-5h, sieving through a 200-mesh sieve, and removing large particle impurities in the slurry; d) injecting the slurry into a plaster mold until a certain thickness is reached, pouring out the residual slurry, placing the plaster mold in the air, demoulding, pouring out a biscuit, drying in an environment of 30-40 DEG C, carrying out fettling, and naturally drying; and 3) heating at the rate of 1-20 DEG C / min to 1600-1800 DEG C, and carrying out thermal insulation for 2-12 h so as to obtain the barium zirconate crucible. The invention has advantages as follows: raw materials are cheap and easily available; the technology is simple; costs are low; and the method is suitable for large-scale production. The prepared barium zirconate crucible has characteristics of high strength, high thermal shock resistance, high density and the like, can be used in a high-temperature environment, and provides a good material foundation for crystal growth and other applications.

Description

technical field [0001] The invention relates to the technical field of high-temperature solid electrolyte materials, in particular to a method for preparing a barium zirconate crucible. Background technique [0002] REBa 2 Cu 3 o 7 (RE = Y, Sm, Nd, etc.) exhibit a very high field-free critical current density at 77K, and have a wide range of practical application prospects. YB 2 Cu 3 o 7-δ (YBCO) is one of several typical oxide high-temperature superconducting materials, because YBCO has a certain ratio of metal cations, and the content of oxygen that determines the carrier can be easily changed as needed. Studies have shown that there are some nodes or branches in the superconducting energy gap of YBCO. These nodes and branches make the physical properties of high Tc oxide superconductors very sensitive to impurities and defects in the crystal. Therefore, in order to investigate the mechanism of high Tc superconductivity and other physical properties in depth, it is ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/48C04B35/622
Inventor 崔景慧王培景文峰夏金峰冯涛黄德信粘洪强杨薇李强
Owner EAST CHINA NORMAL UNIV
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