CN1865154A - Method for preparing cubic phase babrium titanate using microwave method - Google Patents
Method for preparing cubic phase babrium titanate using microwave method Download PDFInfo
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- CN1865154A CN1865154A CN 200610012618 CN200610012618A CN1865154A CN 1865154 A CN1865154 A CN 1865154A CN 200610012618 CN200610012618 CN 200610012618 CN 200610012618 A CN200610012618 A CN 200610012618A CN 1865154 A CN1865154 A CN 1865154A
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Abstract
This invention provides a method for producing cubic barium titanate by microwave, comprising: (1) dissolve the sodium hydroxide in the double distilled water, add equimolar barium chloride and titanium chloride into the above reaction system, adjust the pH to 12-14, and then stir for 0.5-1h; (2)put the above reaction system in microwave oven, adjust the power of the microwave oven to 250-400W, and leave the reaction for 20-30min; (3)take out the reactant, followed by drying and abrasion so as to obtain the product. This method can obtain single cubic phase barium titanate, with mild reaction conditions and short production cycle.
Description
Technical field
The present invention relates to the compound of titanium, specifically belonging to a kind of is raw material with bariumchloride and titanium chloride, in alkaline medium with the method for method for preparing cubic phase babrium titanate using microwave.
Background technology
Barium titanate has higher dielectric constant, good ferroelectric, piezoelectricity, withstand voltage and insulating property, is the key material of environmental harmony type piezoelectricity ferro pottery in electronic industry, the fine ceramics industry.
Along with the electronic ceramics industrial expansion, the demand of barium titanate will constantly increase, and will be also more and more higher to its specification of quality, and single-phase by preparing, high-purity, superfine powdery material is the main path that improves the electron ceramic material performance.
Usually the method for preparing barium titanate adopts calcination method, oxalate method and sol-gel method more, but prepared barium titanate powder is a mixing crystal formation, and its performance can not show a candle to single-phase barium titanate.Though hydrothermal method can obtain single cubic phase barium titanate, the production cycle is longer.
Summary of the invention
The purpose of this invention is to provide and a kind ofly not only can obtain single cubic phase barium titanate, and temperature of reaction is low, the method for preparing cubic phase barium titanate that technical process is short.
The method of a kind of method for preparing cubic phase babrium titanate using microwave provided by the invention is to be raw material with bariumchloride and titanium chloride, makes single cubic phase barium titanate through microwave method in alkaline medium.Its concrete grammar comprises the steps:
(1) with dissolution of sodium hydroxide in redistilled water; Equimolar bariumchloride and titanium chloride are added in the above-mentioned reaction system, regulate pH value 12-14; Stir 0.5～1h then;
(2) above-mentioned reaction system is placed microwave oven, transfer power to the 250～400W (temperature of reaction is 100～300 ℃) of microwave oven, reaction times 20～30min;
(3) take out reactant, dry, grinding obtains the purpose product.
PH value is preferably 13 in the described step (1).
The power of microwave oven is preferably 260～325W (150～200 ℃ of temperature of reaction) in the described step (2).
Compared with prior art, the preparation method of cubic phase barium titanate of the present invention not only can obtain single cubic phase barium titanate, and temperature of reaction is low, and the time is short, mild condition.
Accompanying drawing
Fig. 1 is the X-ray diffraction figure of the barium titanate that makes of the embodiment of the invention 1.
Fig. 2 is the X-ray diffraction figure of the barium titanate that makes of the embodiment of the invention 2.
Embodiment
Embodiment 1
With the 0.1mol dissolution of sodium hydroxide in the 20ml redistilled water, titanium chloride with 0.002mol bariumchloride and equimolar amount adds in the above-mentioned reaction system in the lump then, reacting system PH value is adjusted to 13, violent stirring 30min is placed in the microwave oven, and power transfers to 260W, reaction 25min, take out, dry, grinding obtains barium titanate.
With the 0.15mol dissolution of sodium hydroxide in the 20ml redistilled water, titanium chloride with 0.004mol bariumchloride and equimolar amount adds in the above-mentioned reaction system in the lump then, reacting system PH value is adjusted to 13, violent stirring 1h is placed in the microwave oven, and power transfers to 325W, reaction 30min, take out, dry, grinding obtains barium titanate.
The employed microwave oven of the embodiment of the invention is the micro computer microwave chemical reactor LWMC-201 that is produced by Nanjing Ling Jiang scientific and technological development limited liability company.
The phase purity XRD analysis of barium titanate sample of the present invention adopts Germany to produce (D8 ADVANCE, BRUKER AXS) X-ray diffraction instrument, with Cu target (λ=1.5406nm) under 20～80 degree, 2 θ synthetics is carried out the X-ray powdery analysis.
The crystal spectrogram of twice product is basic identical, and shown in accompanying drawing 1,2, XRD shows cubic phase barium titanate crystal spectrogram.Can see that barium titanate characteristic peak obviously occurs at places such as (100), (110), (111), (200), (210).
Claims (3)
1. the method for a method for preparing cubic phase babrium titanate using microwave is characterized in that comprising the steps:
(1) with dissolution of sodium hydroxide in redistilled water; Equimolar bariumchloride and titanium chloride are added in the above-mentioned reaction system, regulate pH value 12-14; Stir 0.5～1h then;
(2) above-mentioned reaction system is placed microwave oven, transfer power to the 250～400W of microwave oven, reaction 20～30min;
(3) take out reactant, dry, grinding obtains the purpose product.
2. according to the method for the described method for preparing cubic phase babrium titanate using microwave of claim 1, it is characterized in that pH value is 13 in the described step (1).
3. according to the method for the described method for preparing cubic phase babrium titanate using microwave of claim 1, it is characterized in that the power of microwave oven is 260～325W in the described step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610012618 CN1865154A (en) | 2006-04-21 | 2006-04-21 | Method for preparing cubic phase babrium titanate using microwave method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610012618 CN1865154A (en) | 2006-04-21 | 2006-04-21 | Method for preparing cubic phase babrium titanate using microwave method |
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| CN1865154A true CN1865154A (en) | 2006-11-22 |
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| CN 200610012618 Pending CN1865154A (en) | 2006-04-21 | 2006-04-21 | Method for preparing cubic phase babrium titanate using microwave method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214977B (en) * | 2007-01-05 | 2011-07-20 | 北京理工大学 | Preparation method of lithium zirconate material for absorbing carbon dioxide at high temperature |
| CN106631004A (en) * | 2016-12-26 | 2017-05-10 | 湖南先导电子陶瓷科技产业园发展有限公司 | Technology for preparing high-purity superfine barium titanate by improved liquid-phase settling method |
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2006
- 2006-04-21 CN CN 200610012618 patent/CN1865154A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214977B (en) * | 2007-01-05 | 2011-07-20 | 北京理工大学 | Preparation method of lithium zirconate material for absorbing carbon dioxide at high temperature |
| CN106631004A (en) * | 2016-12-26 | 2017-05-10 | 湖南先导电子陶瓷科技产业园发展有限公司 | Technology for preparing high-purity superfine barium titanate by improved liquid-phase settling method |
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