Preparation method for relaxor ferroelectric single crystal raw material

A ferroelectric single crystal and raw material technology, applied in the direction of single crystal growth, single crystal growth, polycrystalline material growth, etc., can solve the problems of increasing the complexity of the production process, prolonging the production cycle, increasing the cost, etc., and reducing the Risk of leaking crucibles, effect of improved quality and efficiency, reduced production costs

Inactive Publication Date: 2015-04-01
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problems of the above-mentioned process are firstly that the activity of lead in the raw material is high, which easily causes lead to corrode the platinum crucible and increases the risk of the crucible leaking; More platinum materials increase the cost of production
If the process of multiple filling is adopted, the crucible will be repeatedly calcined at high temperature, which increases the complexity of the production process, prolongs the production cycle, and increases the risk of crucible leakage

Method used

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Embodiment Construction

[0028] specific implementation plan

[0029] Raw materials for relaxor ferroelectric single crystals mainly include binary system single crystal lead magnesium niobate-lead titanate (PMN-PT), and its main component is xPb(Mg 1 / 3 Nb 2 / 3 )O 3 -(1-x)PbTiO 3 , lead niobate zincate-lead titanate (PZN-PT), its main component is xPb(Zn 1 / 3 Nb 2 / 3 )O 3 -(1-x)PbTiO 3 , lead indium niobate-lead titanate (PIN-PT), the main component of which is xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x)PbTiO 3 And ternary single crystal lead indium niobate-lead magnesium niobate-lead titanate (PIN-PMN-PT), the main component of which is xPb(In 1 / 2 Nb 1 / 2 )O 3 -y Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -(1-x-y)PbTiO 3 And the above-mentioned binary system and ternary system materials modified by doping. Among them, the adjustment range of x is 0.1-0.45, and the adjustment range of y is 0.1-0.5. The doped modified substances include Mn ions, Fe ions, etc., usually adding MnO 2 or Fe 2 o 3 .

[0030] Provide specific...

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Abstract

The invention discloses a preparation method for a relaxor ferroelectric single crystal raw material. The relaxor ferroelectric single crystal raw material comprises lead magnesium niobate-lead titanate (PMN-PT), lead zinc niobate-lead titanate (PZN-PT), lead indium niobate-lead titanate (PIN-PT), lead indium niobate-lead magnesium niobate-lead titanate (PIN-PMN-PT) as well as PMN-PT, PZN-PT, PIN-PT and PIN-PMN-PT which are subjected to doping modification. The preparation method comprises the following steps: adopting basic magnesium carbonate containing crystal water, rutile titanium dioxide, high-purity niobium pentoxide, high-purity indium sesquioxide, high-purity zinc oxide and high-purity lead oxide as raw materials, performing step sintering to finally synthesize a single crystal raw material of required chemical composition, performing processes of secondary ball milling, drying, granulating, forming, adhesive removal, ceramic firing and the like on the synthesized single crystal raw material to prepare a ceramic raw material matched with a growth crucible in shape, and filling the growth crucible with the ceramic raw material. According to the preparation method, the quality of finished crystals can be remarkably improved and the seepage risk of the crucible can be reduced.

Description

technical field [0001] The invention belongs to the technical field of crystal material preparation, and relates to a preparation technology of a binary system and a ternary system relaxation type ferroelectric single crystal raw material. Background technique [0002] Piezoelectric material is a functional material for electromechanical conversion, widely used in many fields such as hydrophone, sonar, anti-theft alarm, medical B-ultrasound, non-destructive flaw detection, navigation and aviation, and structural monitoring. Compared with the traditional lead zirconate titanate (PZT) piezoelectric ceramics, lead magnesium niobate-lead titanate (PMN-PT) and lead indium niobate-lead magnesium niobate-lead titanate ( PIN-PMN-PT), its piezoelectric constant d 33 Up to 2500pC / N, 5 times that of PZT ceramics; piezoelectric constant d 15 It can reach 6000pC / N, 10 times that of PZT ceramics; its electromechanical coupling coefficient is greater than 90%, much higher than 60% of PZT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B11/00
CPCC30B11/00C30B29/22
Inventor 徐卓车俊李振荣王富贵
Owner XI AN JIAOTONG UNIV
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