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Preparation method of BCTZ-xBi<3+> system multifunctional electronic ceramic powder

An electronic ceramic, bctz-xbi3 technology, applied in the field of preparation of BCTZ-xBi3+ system multifunctional electronic ceramic powder, can solve the problems of few studies on relaxor ferroelectrics, achieve shortened sintering time, short production cycle, The effect of uniform distribution of ingredients

Inactive Publication Date: 2014-08-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, BCTZ system electronic ceramics are only used as a lead-free piezoelectric material, and there is little research on it as a relaxor ferroelectric

Method used

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  • Preparation method of BCTZ-xBi&lt;3+&gt; system multifunctional electronic ceramic powder
  • Preparation method of BCTZ-xBi&lt;3+&gt; system multifunctional electronic ceramic powder
  • Preparation method of BCTZ-xBi&lt;3+&gt; system multifunctional electronic ceramic powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A BCTZ-xBi 3+ The preparation method of system multifunctional electronic ceramics comprises the following steps:

[0040] 1) Press Ba:Ca:Zr:Bi=0.9:0.1:0.1:0.005 molar ratio, BaCl 2 2H 2 O, CaCl 2 , ZrOCl 2 ·8H 2 O and Bi(NO 3 ) 3 Dissolve in water respectively, fully stir until completely dissolved, then mix the aqueous solutions of the four substances to obtain a mixed solution;

[0041] 2) According to Ti: Ba: [OH - ]=1:1:5 molar ratio, TiCl 4 Add NaOH and NaOH into the mixed solution, stir well until the mixed solution is white and viscous, and obtain BCTZ-0.005Bi 3+ System powder precursor;

[0042] 3) BCTZ-xBi 3+ The powder precursor of the system is placed in a hydrothermal reaction kettle, and after 15 hours of heat preservation reaction at 150°C, it is cooled to room temperature to obtain BCTZ-xBi 3+ System powder; wherein, the filling degree of the hydrothermal reactor is 60%;

[0043] 4) BCTZ-0.005Bi 3+ After the system powder was washed with de...

Embodiment 2

[0046] A BCTZ-xBi 3+ The preparation method of system multifunctional electronic ceramics comprises the following steps:

[0047] 1) According to the molar ratio of Ba: Ca: Zr: Bi=0.9:0.1:0.1:0.010, BaCl 2 2H 2 O, CaCl 2 , ZrOCl 2 ·8H 2 O and Bi(NO 3 ) 3 Dissolve in water respectively, fully stir until completely dissolved, then mix the aqueous solutions of the four substances to obtain a mixed solution;

[0048] 2) According to the molar ratio of Ti:Ba:[OH-]=1:1:6, TiCl 4 Add NaOH and NaOH into the mixed solution, stir well until the mixed solution is white and viscous, and obtain BCTZ-0.010Bi 3+ System powder precursor;

[0049] 3) BCTZ-0.010Bi 3+ The powder precursor of the system is placed in a hydrothermal reaction kettle, and after 14 hours of heat preservation reaction at 160 ° C, it is cooled to room temperature to obtain BCTZ-xBi 3+ System powder; wherein, the filling degree of the hydrothermal reactor is 70%;

[0050] 4) BCTZ-0.010Bi 3+ After the system ...

Embodiment 3

[0053] A BCTZ-xBi 3+ The preparation method of system multifunctional electronic ceramics comprises the following steps:

[0054] 1) According to the molar ratio of Ba: Ca: Zr: Bi=0.9:0.1:0.1:0.015, BaCl 2 2H 2 O, CaCl 2 , ZrOCl 2 ·8H 2 O and Bi(NO 3 ) 3 Dissolve in water respectively, fully stir until completely dissolved, then mix the aqueous solutions of the four substances to obtain a mixed solution;

[0055] 2) According to Ti: Ba: [OH - ]=1:1:7 molar ratio, TiCl 4 Add NaOH and NaOH into the mixed solution, stir well until the mixed solution is white and viscous, and obtain BCTZ-0.015Bi 3+ System powder precursor;

[0056] 3) BCTZ-0.015Bi 3+ The powder precursor of the system is placed in a hydrothermal reaction kettle, and after 15 hours of heat preservation reaction at 150°C, it is cooled to room temperature to obtain BCTZ-0.015Bi 3+ System powder; wherein, the filling degree of the hydrothermal reactor is 60%;

[0057] 4) BCTZ-0.015Bi 3+ After the system ...

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Abstract

The invention discloses a preparation method of a BCTZ-xBi<3+> system multifunctional electronic ceramic powder. The method comprises the following steps: 1) respectively dissolving BaCl2 2H2O, CaCl2, ZrOCl2, 8H2O and Bi(NO3)3 in water, fully stirring until complete dissolution, mixing the aqueous solutions of the four substances to obtain a mixed solution; 2)adding TiCl4 and NaOH into the mixed solution, and fully stirring to obtain a BCTZ-xBi<3+> system powder precursor; 3) conducting thermal insulation treatment on the BCTZ-xBi<3+> system powder precursor in the hydrothermal environment to obtain a BCTZ-xBi<3+> system powder; 4) washing, precipitating, drying, grinding and molding the BCTZ-xBi<3+> system powder to obtain a BCTZ-xBi<3+> system blank; and 5) conducting microwave sintering on the BCTZ-xBi<3+> system blank in air atmosphere to obtain the BCTZ-xBi<3+> system multifunctional electronic ceramic powder. The invention employs the hydrothermal method to prepare ceramic with small grain, and through Bi ion doping, the ceramic eventually exhibits excellent relaxation behavior. The preparation process has the advantages of simpleness, short production cycle, low sintering temperature and short sintering time, is applicable to industrialized mass production.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a BCTZ-xBi 3+ The preparation method of the system multifunctional electronic ceramic powder. Background technique [0002] BaTiO 3 It is the earliest discovered perovskite dielectric material, which exhibits good ferroelectric behavior at room temperature. It was once known as the pillar of the electronic ceramic industry and is widely used in various electronic material components. Relaxor ferroelectrics have been valued by more and more material researchers due to their superior characteristics over traditional ferroelectrics (such as wide Curie temperature region and high temperature hysteresis loop, etc.), among which BaTiO 3 The relaxation ferroelectric based on the base is one of the biggest research hotspots. BCTZ (Ba 1-x Ca x Ti 1-x Zr x o 3 ) system ceramics not only has good piezoelectric properties, but also has the properties of relaxor ferroelectrics, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622C04B35/626
Inventor 蒲永平孙梓雄
Owner SHAANXI UNIV OF SCI & TECH
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