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Cold-pressing sintering method and cold-pressing sintering apparatus for Bi2O3 ceramic

A sintering device and sintering method technology, applied in the field of low-temperature sintered ceramics, can solve problems such as energy consumption, easy deformation, and coarse grains, and achieve the effects of improving quality, stirring evenly and thoroughly, and dissolving thoroughly

Inactive Publication Date: 2019-11-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional Bi 2 o 3 Ceramics are prepared by high-temperature sintering, and their grains are relatively coarse, easily deformed, and consume a lot of energy. Therefore, a low-temperature method for preparing ceramics is urgently needed.

Method used

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  • Cold-pressing sintering method and cold-pressing sintering apparatus for Bi2O3 ceramic
  • Cold-pressing sintering method and cold-pressing sintering apparatus for Bi2O3 ceramic
  • Cold-pressing sintering method and cold-pressing sintering apparatus for Bi2O3 ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of Bi of the present invention 2 o 3 The ceramic cold-press sintering device includes a control box, a feeding device and a sintering device that are fixedly connected together. The feeding device is fixedly installed on the upper end of the control box, and one end of the sintering device is fixedly connected to the control box. The control box includes Box 1, a display screen 2 and an input key 3 are embedded and installed on the box body 1, and a control system circuit board is installed in the control box to control the operation of all components in the cold-press sintering device. The feeding device includes a barrel 4 , a raw material balance meter 41 is installed on the barrel, a stirring shaft 5 is installed in the barrel 4, and one end of the stirring shaft 5 stretches out of the barrel 4, and the first drive motor 6 is fixedly connected outside the barrel 4, and the barrel 4 There is a feed inlet at the top of the tank, a discharge pipe 7 is fixedly c...

Embodiment 2

[0050] S1: First weigh 5kg of Bi 2 o 3 Pour the powder into the barrel, then take a propionic acid solution with a concentration of 0.5mol / L and press Bi 2 o 3 10% of the powder mass is added to barrel 4.

[0051] S2: Turn on the main switch of the control system, set the heating curve, heat the mold 21 to 70°C at a heating rate of 15°C / min, keep it for 10 minutes, then heat it to 280°C at a heating rate of 15°C / min and keep it for 0.5 hours, set 200MPa pressure, keep the pressure for 0.5 hours, and start the program.

[0052] S3: Start the program, the first driving motor 6 drives the stirring shaft 5 to rotate and mix the raw materials for five minutes to fully mix the raw materials, and at the same time adjust the feeding adjustment device to adjust the injection volume, and use the two-way hydraulic machine 10 to drive the hydraulic piston 11 to move to the left to the limit.

[0053] S4: Open the electric throttle valve 8 to make the mixed raw materials fill the injec...

Embodiment 3

[0062] S1: First weigh 7kg of Bi 2 o 3 Pour the powder into the barrel, then take a propionic acid solution with a concentration of 5mol / L and press Bi 2 o 3 The proportion of 20% of the powder mass is added to barrel 4.

[0063] S2: Turn on the main switch of the control system, set the heating curve, heat the mold 21 to 150°C at a heating rate of 10°C / min, keep it for 18 minutes, then heat it to 250°C at a heating rate of 5°C / min and keep it for 0.5 hours, set 300MPa pressure, keep the pressure for 0.5 hours, and start the program.

[0064] S3: Start the program, the first driving motor 6 drives the stirring shaft 5 to rotate and mix the raw materials for five minutes to fully mix the raw materials, and at the same time adjust the feeding adjustment device to adjust the injection volume, and use the two-way hydraulic machine 10 to drive the hydraulic piston 11 to move to the left to the limit.

[0065] S4: Open the electric throttle valve 8 to make the mixed raw material...

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Abstract

The invention relates to the technical field of low-temperature sintered ceramics, and especially relates to a cold-pressing sintering method and a cold-pressing sintering apparatus for a Bi2O3 ceramic. The apparatus comprises a control box, a feeding device and a sintering device which are fixedly connected together, the sintering device comprises a shell, an upper forming hydraulic machine is fixedly mounted on the upper end surface of the shell, the main shaft of the upper forming hydraulic machine is fixedly provided with an upper mold core, a lower forming hydraulic machine is fixedly mounted at a position, corresponding to the upper forming hydraulic machine, of the lower end surface of the shell, the main shaft of the lower forming hydraulic machine is fixedly provided with a lowermold core, the sidewall of the shell is provided with a mounting table, a mold is detachably mounted on the mounting table, and the outer wall of the mold is provided with a heating mechanism. The cold-pressing sintering method and the cold-pressing sintering apparatus for a Bi2O3 ceramic can realize the high-density Bi2O3 ceramic, and the processed Bi2O3 ceramic has the advantages of high yield,clean surface and realization of industrial batch streamline production.

Description

technical field [0001] The invention relates to the technical field of low-temperature sintered ceramics, in particular to a Bi 2 o 3 A ceramic cold-press sintering method and a cold-press sintering device. Background technique [0002] Bi 2 o 3 The special crystal structure and excellent photoelectric properties determine that as a new type of functional material, it has broad application prospects in electronic ceramic powder materials, electrolyte materials, photoelectric materials, high-temperature superconducting materials, and catalysts. [0003] Bismuth oxide is an oxide semiconductor with cubic fluorite ore-type defects, and 1 / 4 of the oxygen ion sites in its crystal lattice are vacant, so it has very high oxygen ion conductivity. Bismuth oxide has four main crystal phases ( Monoclinic α-Bi 2 o 3 , tetragonal β-Bi 2 o 3 , γ-Bi in bulk cubic phase 2 o 3 , δ-Bi of the face cubic phase 2 o 3 ) and two non-stoichiometric phases (Bi 2 o 2.33 and Bi 2 o 2.7...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622C04B35/64
CPCC04B35/453C04B35/622C04B35/64
Inventor 朱归胜宋金杰徐华蕊傅维宁尹荣王琦朱伟
Owner GUILIN UNIV OF ELECTRONIC TECH
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