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Preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic

A temperature-stable, ceramic preparation technology, applied in the field of functional ceramics, can solve the problems of limited application range, poor temperature stability, and achieve the effect of ensuring temperature stability, high dielectric constant, and uniform grains

Active Publication Date: 2015-05-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, (Ba,Sr)TiO 3 The dielectric constant of ceramics has a large mutation near the Curie point, and has the defect of poor temperature stability, which limits its application range

Method used

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  • Preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic
  • Preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic
  • Preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: adding the first part of KOH solution with a concentration of 4mol / L to Sr(NO) with a concentration of 1.5mol / L 3 ) 2 solution mixed to obtain mixed solution A, in mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1.2; while TiCl 4 Add dropwise into the second KOH solution with a concentration of 5mol / L, and mix evenly to obtain a mixed solution B. In the mixed solution B, TiCl 4 : The molar ratio of KOH is 1:4; then press Sr(NO 3 ) 2 and TiCl 4 The molar ratio is 1:0.8, take mixed solution A and mixed solution B to mix, stir evenly to get SrTiO 3 precursor solution;

[0032] Step 2: TiCl 4 Add BaCl dropwise 2 Mix well in the solution, in which BaCl 2 and TiCl 4 The molar ratio is 1:0.6, to obtain a mixed solution C; then KOH is added to the mixed solution C, wherein BaCl 2 The molar ratio with KOH is 1:5 to get BaTiO 3 precursor solution;

[0033] Step 3: the SrTiO prepared in step 1 3 Precursor solution and BaTiO produced in step 2 3 ...

Embodiment 2

[0036] Step 1: adding the first part of KOH solution with a concentration of 4.9mol / L into Sr(NO 3 ) 2 solution mixed to obtain mixed solution A, in mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1.4; while TiCl 4 Add dropwise the second part of KOH solution with a concentration of 4.9mol / L, and mix well to obtain a mixed solution B. In the mixed solution B, TiCl 4 : The molar ratio of KOH is 1:3.5; then press Sr(NO 3 ) 2 and TiCl 4 The molar ratio is 1:0.9, take mixed solution A and mixed solution B to mix, stir evenly to get SrTiO 3 precursor solution;

[0037] Step 2: TiCl 4 Add BaCl dropwise 2 Mix well in the solution, in which BaCl 2 and TiCl 4 The molar ratio of is 1:0.7, obtains mixed solution C; Then KOH is added in mixed solution C, wherein BaCl 2 The molar ratio with KOH is 1:6 to get BaTiO 3 precursor solution;

[0038] Step 3: the SrTiO prepared in step 1 3 Precursor solution and BaTiO produced in step 2 3 Mix the precursor solution, st...

Embodiment 3

[0041] Step 1: adding the first part of KOH solution with a concentration of 4.2mol / L into Sr(NO 3 ) 2 solution mixed to obtain mixed solution A, in mixed solution A, Sr(NO 3 ) 2 : The molar ratio of KOH is 1:1; while TiCl 4 Add dropwise into the second part of KOH solution with a concentration of 4.5mol / L, and mix evenly to obtain a mixed solution B. In the mixed solution B, TiCl 4 : The molar ratio of KOH is 1:3; then press Sr(NO 3 ) 2 and TiCl 4 The molar ratio is 1:1.1, take mixed solution A and mixed solution B to mix, stir evenly to get SrTiO 3 Precursor solution;

[0042] Step 2: TiCl 4 Add BaCl dropwise 2 Mix well in the solution, in which BaCl 2 and TiCl 4 The molar ratio is 1:0.8, to obtain a mixed solution C; then KOH is added to the mixed solution C, wherein BaCl 2 The molar ratio with KOH is 1:7 to get BaTiO 3 Precursor solution;

[0043] Step 3: the SrTiO prepared in step 1 3 Precursor solution and BaTiO produced in step 2 3 Mix the precursor solu...

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Abstract

The invention relates to a preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic. The preparation method comprises the following steps: uniformly mixing a SrTiO3 precursor solution and a BaTiO3 precursor solution, adding MgCl2 and mixing uniformly, and performing a hydrothermal reaction to obtain powder, wherein the molar ratio of SrTiO3, BaTiO3 and MgCl2 is a(0.9-x):0.1b:x; performing grinding, granulation and tableting forming of the obtained powder; and sintering at 1,200-1,300 DEG C to obtain Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic. According to the preparation method provided by the invention, the Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic is simple in chemical composition and meets the requirements of industrial production, the doping matters are simple and easily available, and the obtained powder is of pure phase so that the ceramic has relatively high dielectric constant and the temperature stability and uniform and dense grains are guaranteed.

Description

technical field [0001] The invention relates to the field of functional ceramics, in particular to a Ba (0.9-x) Sr 0.1 Mg x TiO 3 Method for preparing temperature-stable lead-free ceramics. Background technique [0002] Materials are the material basis of social and technological progress, and energy, information, and new materials occupy the three pillar positions in the process of modern civilization. Functional ceramic materials in new materials have been widely used in recent years, especially functional materials with superior properties have been highly valued by the scientific and technological community. With the advancement of science and technology, the requirements for materials are continuously improved. Electronic equipment not only needs to be miniaturized and environmentally friendly, but also requires very harsh working environments. For example, the working environment temperature in aerospace, oil drilling and other fields is different. at normal opera...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
Inventor 蒲永平刘雨雯靳乾
Owner SHAANXI UNIV OF SCI & TECH
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