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Synthesis method of rodlike Mg<2+>-doped SrTiO3

A synthesis method and rod-shaped technology, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of complex steps, high Curie temperature, high energy consumption of high-temperature calcination, etc., and achieve simple preparation method and good dielectric properties , strong practical effect

Active Publication Date: 2017-05-31
LULIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Strontium titanate is often used in electronic components, but it also has some defects: dielectric loss, large temperature coefficient, high Curie temperature, etc. If some elements are doped in strontium titanate, it will greatly change the properties of the material. Performance, so that its performance has been significantly improved
However, there are problems such as complex steps, the need to add additives, high energy consumption for high-temperature calcination, and impurities

Method used

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  • Synthesis method of rodlike Mg&lt;2+&gt;-doped SrTiO3
  • Synthesis method of rodlike Mg&lt;2+&gt;-doped SrTiO3
  • Synthesis method of rodlike Mg&lt;2+&gt;-doped SrTiO3

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Experimental program
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Effect test

Embodiment 1

[0036] Reagents used in the experiment: tetrabutyl titanate (AR, Tianjin Kemiou Chemical Reagent Co., Ltd.), absolute ethanol (AR, Xi’an Chemical Reagent Factory), sodium hydroxide (NaOH, AR, Tianjin Hengxing Chemical Reagent Manufacturing Co., Ltd. Co., Ltd.), formic acid (HCOOH, AR, Tianjin Fuchen Chemical Reagent Factory), strontium hydroxide (AR, Tianjin Fuchen Chemical Reagent Factory), magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O, AR, Tianjin Fuchen Chemical Reagent Factory).

[0037] Instruments used in the experiment: electric blast drying oven (QZX-9246MBE, Shanghai Boxun Industrial Co., Ltd. Medical Equipment Factory), electron microscope (JSM-6010LV, Japan Electronics (JEOL)), MSAL-XRD 2 Fully automatic X-ray powder diffractometer (CuKa ray, tube pressure = 36kV, tube flow 20mA, scanning speed 8 0 / min), the TENSOR27FT-IR analyzer of Bruker, Germany (the sample adopts the KBr tablet method, and its working spectral range is 7500-370cm -1 ), German Dataphysics company ...

Embodiment 2

[0062] The synthesis steps of rod-shaped magnesium-doped strontium titanate:

[0063]1. Preparation of amorphous titanium dioxide: Add 40 mL of absolute ethanol and 1 mL of tetrabutyl titanate to a petri dish in sequence. Then the petri dish was placed in a constant temperature water bath, and reacted at 35° C. for 8 h. After the reaction was completed, the obtained solid powder was stored in bottles for use in the following experiments.

[0064] 2. Preparation of anatase titanium dioxide: 2.0 g of amorphous titanium dioxide was weighed and placed in a crucible. The crucible was put into a muffle furnace and calcined at a high temperature of 450°C for 2h. After the reaction was completed, the resulting solid powder was stored in bottles for use in the following experiments.

[0065] 3. Precursor Na 2 Ti 3 o 7 Preparation: Weigh 1.0 g of homemade anatase titanium dioxide into a polytetrafluoroethylene lining, and add 20 mL of 10 mol / L sodium hydroxide solution. After sti...

Embodiment 3

[0069] The synthesis steps of rod-shaped magnesium-doped strontium titanate:

[0070] 1. Preparation of amorphous titanium dioxide: Add 40 mL of absolute ethanol and 1 mL of tetrabutyl titanate to a petri dish in sequence. Then the petri dish was placed in a constant temperature water bath, and reacted at 35° C. for 8 h. After the reaction was completed, the obtained solid powder was stored in bottles for use in the following experiments.

[0071] 2. Preparation of anatase titanium dioxide: 2.0 g of amorphous titanium dioxide was weighed and placed in a crucible. The crucible was put into a muffle furnace and calcined at a high temperature of 450°C for 2h. After the reaction was completed, the resulting solid powder was stored in bottles for use in the following experiments.

[0072] 3. Precursor Na 2 Ti 3 o 7 Preparation: Weigh 1.0 g of homemade anatase titanium dioxide into a polytetrafluoroethylene lining, and add 20 mL of 10 mol / L sodium hydroxide solution. After st...

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Abstract

The invention discloses a synthesis method of rodlike Mg<2+>-doped SrTiO3. Firstly, a precursor Na2Ti3O7 is prepared from titanium dioxide and sodium hydroxide as raw materials under a hydrothermal condition of 200 DEG C; and secondly, rodlike Mg<2+>-doped SrTiO3 powder is prepared from Na2Ti3O7, strontium hydroxide and magnesium nitrate as raw materials. A product does not contain other impurities and is a pure substance through FT-IR analysis. The internal structure and surface of the final product SMT are discussed separately through XRD, ICP, SEM and CA. The method is mild in reaction conditions, friendly to environment and high in yield; and meanwhile, the form, crystallinity and size of strontium titanate can be effectively controlled. The method is simple in step, convenient to operate and high in practicability.

Description

technical field [0001] The invention belongs to the field of synthesis of nano crystal electronic ceramics, in particular to a rod-shaped Mg 2+ doped SrTiO 3 synthetic method. Background technique [0002] In our daily life, the vast majority of functional materials used are perovskite materials, among which strontium titanate is the main research object. Since 1950, scientists have studied SrTiO 3 Various solid solutions have been studied in depth. SrTiO 3 with typical ABO 3 Crystal structure, is one of the most typical perovskite oxide materials. Strontium titanate is often used in electronic components, but it also has some defects: dielectric loss, large temperature coefficient, high Curie temperature, etc. If some elements are doped in strontium titanate, it will greatly change the properties of the material. Performance, so that its performance has been significantly improved. Therefore, the preparation method of doped strontium titanate has received extensive ...

Claims

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Application Information

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IPC IPC(8): C01G23/00C04B35/47C04B35/626
CPCC01G23/006C01P2002/34C01P2002/72C01P2002/82C01P2004/03C01P2004/04C01P2004/10C04B35/47C04B35/62645C04B2235/3206C04B2235/3208C04B2235/3215
Inventor 高淑娟薛玫薛金辉李林枝贾胜利
Owner LULIANG UNIV
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