Low-temperature preparation method of strontium lanthanum aluminate composite material

A nano-composite material, lanthanum strontium aluminate technology, applied in the field of material manufacturing, can solve the problems of high preparation temperature, difficult to control, easy agglomeration and crystallization of products, etc.

Inactive Publication Date: 2018-03-23
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a low-temperature preparation method of strontium-lanthanum aluminate nanocomposites, and solve the problem of high preparation temperature of strontium-lanthanum aluminate nanocomposites in the prior art, easy agglomeration of products and difficulty in controlling the degree of crystallization technical issues

Method used

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preparation example Construction

[0013] This embodiment provides a low-temperature preparation method of a strontium lanthanum aluminate nanocomposite material, comprising the following steps:

[0014] (1) Mix strontium salt solution, lanthanum salt solution, aluminum salt solution, organic fuel and complexing agent uniformly: press SrLaAlO 4 The stoichiometric ratio takes the Sr-containing compound, the La-containing compound and the Al-containing compound as raw materials, preferably, the raw materials adopt Sr(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O and La 2 o 3 , and Sr(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O and La 2 o 3 The molar ratio is 1:1:0.5; prepare a mixed solution of strontium nitrate, lanthanum nitrate and aluminum nitrate; add organic fuel and complexing agent to the mixed solution of strontium nitrate, lanthanum nitrate and aluminum nitrate, stir it with electromagnetic for 10-60min, Make a uniformly mixed solution, preferably, the time of electromagnetic stirring is 30min; the organic fuel is at le...

Embodiment 1

[0020] This embodiment provides a low-temperature preparation method of strontium lanthanum aluminate nanocomposite material, comprising the following steps:

[0021] (1) Weigh 1mol of Sr(NO 3 ) 2 and 1mol of Al(NO 3 ) 3 9H 2 O was added to No. 1 beaker, and deionized water was added and stirred to completely dissolve the contents in the beaker; weigh 0.5 mol of La with a purity of 99.99%. 2 o 3 Add to No. 2 beaker, then add excess concentrated nitric acid, wait for La 2 o 3 After completely dissolving, add ammonia water to the beaker, adjust the pH value of the solution to 4, and obtain La(NO 3 ) 3 solution. Pour the lanthanum nitrate solution in the No. 2 beaker into the No. 1 beaker, and stir the mixed solution to mix evenly to obtain the mixed solution of strontium nitrate, lanthanum nitrate and aluminum nitrate. Then weigh 4 mol of urea as fuel and 16 mol of ethylene glycol as complexing agent, add them into the mixed solution of strontium nitrate, lanthanum nit...

Embodiment 2

[0024] This embodiment provides a low-temperature preparation method of strontium lanthanum aluminate nanocomposite material, comprising the following steps:

[0025] (1) Weigh 1mol of Sr(NO 3 ) 2 and 1mol of Al(NO 3 ) 3 9H 2 O was added to No. 1 beaker, and deionized water was added and stirred to completely dissolve the contents in the beaker; weigh 0.5 mol of La with a purity of 99.99%. 2 o 3 Add to No. 2 beaker, then add excess concentrated nitric acid, wait for La 2 o 3 After completely dissolving, add ammonia water to the beaker, adjust the pH value of the solution to 4, and obtain La(NO 3 ) 3 solution. Pour the lanthanum nitrate solution in the No. 2 beaker into the No. 1 beaker, and stir the mixed solution to mix evenly to obtain the mixed solution of strontium nitrate, lanthanum nitrate and aluminum nitrate. Then weigh 1 mol of urea as fuel and 5 mol of ethylene glycol as complexing agent, add them into the mixed solution of strontium nitrate, lanthanum nitr...

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Abstract

The invention provides a low-temperature preparation method of a strontium lanthanum aluminate composite material. The low-temperature preparation method comprises the following steps: uniformly mixing a strontium nitrate solution, a lanthanum nitrate solution, an aluminum nitrate solution, an organic fuel and a complexing agent, gradually raising the temperature of the mixed solution to 500 to 900 DEG C from room temperature to carry out a combustion reaction, and cooling to room temperature after the reaction so as to obtain the strontium lanthanum aluminate composite material. The strontiumlanthanum aluminate composite material is synthesized by using a combustion synthesis method, the organic fuel is added into the raw materials, and the preparation temperature of the strontium lanthanum aluminate composite material is reduced by using a great deal of heat released in the combustion process of the organic fuel; the complexing agent is added into the raw materials, and the temperature is gradually raised, the raw materials can be uniformly distributed in the solution, when the temperature is gradually raised, the complexing agent is slowly expanded, and a loosened product withunifromer granular sizes and purity is generated, so that the problems that the product is easy to agglomerate and the crystallization degree is unlikely to control can be effectively solved.

Description

technical field [0001] The invention relates to the field of material manufacturing, and more specifically, relates to a low-temperature preparation method of a strontium-lanthanum aluminate nanocomposite material. Background technique [0002] Strontium Lanthanum Aluminate (SrLaAlO 4 ) is a typical ABCO 4 type of oxide, ABCO 4 Oxides have a special crystal structure and rich and excellent properties, and they have huge potential for practical development. SrLaAlO 4 It has good chemical stability, thermal stability and good dielectric properties, making it have good application prospects in dielectric ceramics and laser substrates. At the same time, with SrLaAlO 4 as the matrix, doped with Dy 3+ Ionic luminescent materials can be used for white light luminescent materials, which have good color coordinates and color temperature, and meet the excitation requirements of LED chips on the market. [0003] Currently SrLaAlO 4 The synthesis method of composite materials is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C04B35/44C04B35/626B82Y40/00
CPCB82Y40/00C01P2002/72C01P2004/04C04B35/44C04B35/6267C04B2235/3213C04B2235/3227C01F17/34
Inventor 朱俊豪朱德生
Owner YANGTZE UNIVERSITY
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