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Preparation process of barium strontium niobate ceramic powder

A technology of strontium barium niobate and ceramic powder, which is applied in the field of preparation of strontium barium niobate ceramic powder, can solve the problems of complex preparation process, influence on ceramic performance, long reaction cycle, etc., and achieve simple equipment, low cost, and low cost. The effect of synthesis temperature

Inactive Publication Date: 2008-05-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of this kind of piezoelectric ceramics is relatively simple, traditionally using high-temperature sintering method, such as the traditional solid-state reaction method introduced by Vandamme N S et al. in J.Am.Ceram.Soc.74 volume 1785 in 1991 Strontium barium niobate ceramic powder, due to the high combustion temperature ~ 1050°C when the powder is synthesized, the grains grow abnormally, which seriously affects the performance of the ceramic
Moreover, the preparation process is complicated, the reaction cycle is long, and the energy consumption is high.

Method used

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  • Preparation process of barium strontium niobate ceramic powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: raw material adopts 0.1mol NbCl 5 (AR) reacts with 0.2mol primary distilled water, adding 0.25mol H 2 C 2 o 4 2H 2 O, add 2.19molH 2 o 2 (30%, v / w) as catalyst, stir well to obtain yellow transparent solution, add 0.0375mol Ba(NO 3 ) 2 (AR) and 0.0125mol Sr(NO 3 ) 2 (AR) as an oxidizing agent, add 0.014molC 6 h 8 o 7 ·H 2 O(AR) was used as a reducing agent to obtain a transparent yellow precursor solution. Pour the above precursor solution into an evaporating dish and heat it on an electric furnace to react to obtain a light yellow solid. This solid was roasted in a muffle furnace at 850°C. get Sr 0.25 Ba 0.75 Nb 2 o 6 Ceramic powder.

Embodiment 2

[0011] Embodiment 2: raw material adopts 0.1mol NbCl 5 (AR) reacts with 0.22mol primary distilled water, adding 0.25mol H2 C 2 o 4 2H 2 O, add 2.19molH 2 o 2 (30%, v / w) as catalyst, stir well to obtain yellow transparent solution, add 0.036mol Ba(NO 3 ) 2 (AR) and 0.014mol Sr(NO 3 ) 2 (AR) as an oxidizing agent, add 0.028molC 6 h 8 o 7 ·H 2 O(AR) as reducing agent, add 0.025mol NH 4 NO 3 (AR) is used as a combustion aid to obtain a transparent yellow precursor solution. Pour the above precursor solution into an evaporating dish and heat it on an electric furnace to react to obtain a light yellow solid. This solid is roasted in a muffle furnace at 850 ° C to obtain Sr 0.28 Ba 0.72 Nb 2 o 6 Ceramic powder.

Embodiment 3

[0012] Embodiment 3: raw material adopts 0.1mol NbCl 5 (AR) reacts with 0.24mol primary distilled water, adding 0.25mol H 2 C 2 o 4 2H 2 O, add 2.19molH 2 o 2 (30%, v / w) as catalyst, stir well to obtain yellow transparent solution, add 0.035mol Ba(NO 3 ) 2 (AR) and 0.015mol Sr(NO 3 ) 2 (AR) as an oxidizing agent, add 0.056molC 6 h 8 o 7 ·H 2 O(AR) as reducing agent, add 0.05mol NH 4 NO 3 (AR) is used as a combustion aid to obtain a transparent yellow precursor solution. Pour the above precursor solution into an evaporating dish and heat it on an electric furnace to react to obtain a light yellow solid. This solid is roasted in a muffle furnace at 850 ° C to obtain Sr 0.3 Ba 0.7 Nb 2 o 6 Ceramic powder.

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Abstract

The present invention is the preparation process of barium strontium niobate ceramic powder. Niobium oxalate and oxidant barium nitrate and strontium nitrate are mixed and prepared into solution with pure water; proper amount of comburant and organic reductant citric acid, urea, glycine, oxalyl dihydrazine, carbamine, dimethyl hydrazide or hexamethine tetramine are added to obtain precursor solution; the precursor solution is heated to evaporate water and further heated to burn to obtain puffed powder; and the puffed powder is roasted in muffle to obtain the barium strontium niobate ceramic powder. The present invention has simple technological process, simple equipment, short time consumption, low synthesis temperature and molecule level mixing, and the product has high purity, fine grain, homogeneous crystal phase and other features.

Description

technical field [0001] The invention belongs to a preparation method of barium strontium niobate ceramic powder. Background technique [0002] Lead-based ceramics will cause serious damage to humans and the ecological environment in the process of production, use and disposal. Therefore, the research and preparation of piezoelectric ceramics with satisfactory usability and good environmental coordination requires that the material system itself does not contain Substances that may cause damage to the ecological environment do not produce substances that may be harmful to the environment during the process of preparation, use, and disposal, and the preparation process of the material has environmental coordination characteristics such as less energy consumption. [0003] The tungsten bronze structure niobate contained in the niobate-based lead-free piezoelectric ceramics has attracted attention as one of the lead-free piezoelectric ceramic systems. At present, the preparatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 刘雅言杨一飞郝先窦佰生
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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