Oriented growth method of relaxor ferroelectric single crystal lead zincate niobate-lead titanate

A relaxation ferroelectric single crystal, lead niobate zincate technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of inability to directly observe the growth crystal state, small size, uncertain growth direction, etc. Achieve the effect of controllable crystal nucleation direction, high yield and high quality

Inactive Publication Date: 2021-06-04
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The lead niobate zincate-lead titanate crystal obtained by the usual method has an uncertain growth direction and a small size. After the crystal is obtained, lead oxide adheres to the surface, which is troublesome to handle and cannot directly observe the state of the growing crystal.

Method used

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  • Oriented growth method of relaxor ferroelectric single crystal lead zincate niobate-lead titanate
  • Oriented growth method of relaxor ferroelectric single crystal lead zincate niobate-lead titanate
  • Oriented growth method of relaxor ferroelectric single crystal lead zincate niobate-lead titanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 0.93Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.07PbTiO 3 Crystal preparation

[0024] The initial raw materials PbO, ZnO, Nb 2 o 3 、TiO 2 According to 0.93Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.07PbTiO 3 The chemical composition of the mixture was weighed and mixed uniformly, ground for 2 hours, and initially calcined at 850°C for 4 hours. Then continue to grind the powder after initial calcining for 2 hours, and put it into a tube furnace for secondary calcining at 950°C for 4 hours to obtain 0.93Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.07PbTiO 3 For the polycrystalline powder, take out the powder that has been calcined twice, and then add PbO in the same amount as the polycrystalline powder as a cosolvent, and continue to fully grind for 2 hours. Put the above-mentioned mixed material into a platinum crucible, put it in a furnace, first raise the temperature to 1200°C to melt the mixed material into a solution, and then cool down to start growing crystals (such as figure 1 shown), when the ...

Embodiment 2

[0025] Example 2 0.96Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.04PbTiO 3 Crystal preparation

[0026] The initial raw materials PbO, ZnO, Nb 2 o 3 、TiO 2 According to 0.96Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.04PbTiO 3 The chemical composition of the mixture was weighed and mixed uniformly, ground for 2 hours, and initially calcined at 880°C for 4 hours. Then continue to grind the powder after initial calcining for 2 hours, and put it into a tube furnace for secondary calcining at 950°C for 6 hours to obtain 0.96Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.04PbTiO 3 For the polycrystalline powder, take out the pre-fired powder for the second time, then add the same amount of PbO as the polycrystalline powder as a cosolvent, and continue to fully grind for 2 hours. Put the above-mentioned mixture into a platinum crucible, put it in a furnace, first raise the temperature to 1200°C to melt the mixture into a solution, and then cool down to start growing crystals. At 1078°C, add lead-titanium niobate zincate with a ...

Embodiment 3

[0027] Example 3 0.98Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.02PbTiO 3 Crystal preparation

[0028] The initial raw materials PbO, ZnO, Nb 2 o 3 、TiO 2 According to 0.98Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.02PbTiO 3 The chemical composition of the mixture was weighed and mixed uniformly, ground for 2 hours, and initially calcined at 850°C for 4 hours. Then continue to grind the powder after initial calcining for 2 hours, and put it into a tube furnace for secondary calcining at 960°C for 4 hours to obtain 0.98Pb(Zn 1 / 3 Nb 2 / 3 o 3 )-0.02PbTiO 3 For the polycrystalline powder, take out the powder that has been calcined twice, and then add PbO in the same amount as the polycrystalline powder as a cosolvent, and continue to fully grind for 2 hours. Put the above-mentioned mixture into a platinum crucible, put it in a furnace, first raise the temperature to 1200°C to melt the mixture into a solution, then cool down to start growing crystals, and at 1080°C, add lead-titanium niobate zincate whos...

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Abstract

The invention discloses an oriented growth method of relaxor ferroelectric single crystal lead zinc niobate-lead titanate, and belongs to the technical field of single crystal growth. The initial raw material is prepared according to the following formula: (1-x) Pb (Zn<1 / 3>Nb<2 / 3>O<3>)-xPbTiO<3>, 0<x<0.2; the preparation method comprises the following steps: weighing and mixing the raw materials according to the chemical composition ratio, grinding, pre-sintering, melting at high temperature, cooling, putting in a seed crystal for oriented growth and the like. The method is convenient to operate, controllable in crystal nucleation direction and high in yield, high-quality and large-size PZN-PT crystals can be obtained, seed crystals cannot be dissolved, the grown crystals cannot be attached by volatile PbO, and the crystal growth condition can be visually observed from a quartz glass plate.

Description

technical field [0001] The invention belongs to the technical field of single crystal growth, in particular to a method for directional growth of relaxor ferroelectric single crystal lead niobate zincate-lead titanate (PZN-PT). Background technique [0002] For a long time, among many functional materials, ferroelectric materials have been favored by people. Piezoelectric materials can realize mutual conversion between mechanical energy and electrical energy. In addition to piezoelectric and ferroelectric properties, piezoelectric materials can be , heat, light, electricity, sound, etc.) will also show unique performance, and it is the core material for making drives, sensors, transducers, radars, micro motors and other devices, and the devices made of these materials are even more popular. It is widely used in medical imaging, modern electronic technology, detection technology, sensing technology, ultrasonic transducer technology and national defense and military industry, ...

Claims

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Application Information

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IPC IPC(8): C30B29/30C30B29/32C30B9/12
CPCC30B9/12C30B29/30C30B29/32
Inventor 李亮宫美琪周强李芳菲
Owner JILIN UNIV
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