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Method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube

A ceramic powder and bismuth ferrite-based technology, which is applied in the field of preparing bismuth ferrite-based strips coated with silver tube ceramic powder, achieves the effects of high efficiency, improved uniformity, and easy industrial production

Inactive Publication Date: 2019-04-23
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned shortcomings that the existing bismuth ferrite-based ceramics are difficult to prepare strips through plastic deformation, the present invention provides a method for preparing bismuth ferrite-based strips by coating ceramic powders with silver tubes, which is a method for iron coating by coating ceramic powders with silver tubes. Special forming method for preparation of bismuth acid-based strips: Utilizing the excellent formability of metallic silver, the coated ceramic powder is subjected to drawing and rolling deformation under the action of three-dimensional compressive stress to obtain ceramic strips with the target thickness

Method used

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  • Method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube
  • Method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube

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Effect test

Embodiment 1

[0031] The method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube includes the following steps:

[0032] Step 1. Prepare ceramic powder rod:

[0033] (1) Using the sol-gel self-combustion method, prepare 9g of bismuth ferrite-based ceramic powder with a particle size of ≤500nm.

[0034] (2) Fill the bismuth ferrite-based ceramic powder in the lower mold, and then close the upper and lower molds and place them on the hydraulic press for compression; it is compressed into a ceramic powder rod with a diameter of 6mm and a length of 115mm. 4MPa, the pressing time is 10s;

[0035] Step 2. Silver tube coated ceramic powder rod:

[0036] (1) Cut to obtain a silver tube; among them, the wall thickness of the silver tube is 1mm, the outer diameter of the silver tube is 8mm, and the length of the silver tube is 120mm;

[0037] (2) Put the ceramic powder rod into the silver tube, and seal both ends of the silver tube by argon arc welding;

[0038] Step ...

Embodiment 2

[0044] The method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube includes the following steps:

[0045] Step 1. Prepare ceramic powder rod:

[0046] (1) Using traditional sol-gel method to prepare 0.97BiFeO3-0.03BaTiO 3 18g of bismuth ferrite-based binary solid solution powder, particle size ≤500nm;

[0047] (2) Fill the binary solid solution powder in the lower mold, then close the upper and lower molds, and place them on the hydraulic press for pressing; press into a ceramic powder rod with a diameter of 8mm and a length of 110mm, where the pressure during pressing 8MPa, the pressing time is 15s;

[0048] Step 2. Silver tube coated ceramic powder rod:

[0049] (1) Cut to obtain a silver tube; wherein the wall thickness of the silver tube is 1mm, the outer diameter of the silver tube is 10mm, and the length of the silver tube is 120mm;

[0050] (2) Put the ceramic powder rod into the silver tube, and seal both ends of the silver tube by ar...

Embodiment 3

[0057] The method for preparing bismuth ferrite-based strip material by coating ceramic powder with silver tube includes the following steps:

[0058] Step 1. Prepare ceramic powder rod:

[0059] (1) Using the sol-gel self-combustion method, prepare 7g of bismuth ferrite-based ceramic powder with a particle size of ≤500nm;

[0060] (2) Fill the bismuth ferrite-based ceramic powder in the lower mold, then close the upper and lower molds, and place them on the hydraulic press for pressing; press into a ceramic powder rod with a diameter of 4mm and a length of 110mm. The pressure is 2MPa, and the pressing time is 10s;

[0061] Step 2. Silver tube coated ceramic powder rod:

[0062] (1) Cut to obtain a silver tube; wherein the wall thickness of the silver tube is 1mm, the outer diameter of the silver tube is 6mm, and the length of the silver tube is 120mm;

[0063] (2) Put the ceramic powder rod into the silver tube, and seal both ends of the silver tube by argon arc welding;

[0064] Step 3...

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Abstract

A method for preparing bismuth ferrite-based strips by coating ceramic powder with silver tubes, belonging to the technical field of ceramic strip processing. The method is: 1) Prepare ceramic powder rods: use sol-gel auto-combustion method or traditional sol-gel method to prepare bismuth ferrite-based ceramic powder and then press it into ceramic powder rods; 2) Silver tube coating ceramic powder Rod: Cut to obtain a silver tube; put the ceramic powder rod into the silver tube, and seal both ends of the silver tube; 3) Coat and draw the silver tube with both ends sealed; 4) Coat the silver tube with ceramic wire, and the silver tube-coated ceramic strip is obtained by cladding and rolling. The method of the present invention uses a silver tube to coat ceramic powder, so that the ceramic powder is in a high hydrostatic pressure environment; the coating deformation process avoids shearing of the ceramic powder and improves the uniformity of deformation; the method of the present invention has high efficiency and low cost. Low and easy to realize industrial production.

Description

Technical field [0001] The invention belongs to the technical field of ceramic strip processing, and particularly relates to a method for preparing a bismuth ferrite-based strip with silver tube coated ceramic powder. Background technique [0002] Bismuth Ferrite (BiFeO 3 ) As one of the few multiferroic materials with ferroelectric and antiferromagnetic properties at room temperature, it has potential applications in magnetic and electrical coupling effects, information storage, etc., and has received widespread attention. At present, bismuth ferrite is generally prepared into powder, and then sintered into the only forms of fibers, films and blocks, which severely limits its wider application in functional devices. Ceramics have almost no plastic deformation ability at room temperature, and are brittle and difficult to plastically deform. Therefore, it is very difficult to prepare bismuth ferrite ceramic strips. Summary of the invention [0003] Aiming at the above-mentioned sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/26C04B35/622C04B2235/60
Inventor 包立齐西伟梅瑞斌张敏
Owner NORTHEASTERN UNIV LIAONING
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