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Method for preparing ceramic powder by combustion method

A combustion method and powder technology, which is applied in the field of preparing ceramic powder by combustion method, can solve the problems of neglecting the preparation method of glycerin dosage and the like.

Inactive Publication Date: 2019-03-22
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] From the above analysis, it can be seen that in the work of using glycerin as a combustion aid to prepare ceramic powder, influenced by the traditional concepts of documents A and B, the ratio of glycerin to nitrate is limited to more than 1.07, while ignoring the use of less glycerin Preparation

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  • Method for preparing ceramic powder by combustion method
  • Method for preparing ceramic powder by combustion method
  • Method for preparing ceramic powder by combustion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of Ce 0.8 SM 0.2 o 1.9 The process of ceramic powder is as follows:

[0024] Take 347.37g of Ce(NO 3 ) 3 ·6H 2 O,88.89g of Sm(NO 3 ) 3 ·6H 2 0, dissolve with deionized water, be prepared as the solution of 1L standard volume with volumetric flask, obtain the nitrate solution that metal ion total concentration is 1mol / L; Get the nitrate solution 23.18ml that last step prepares, get 1.50g glycerol again, Mix the two to obtain a mixed solution, the molar ratio of glycerin and metal ions in this mixed solution is 0.70:1; heat the mixed solution in the previous step at 100°C to evaporate water until the solution becomes viscous; put the viscous solution in the previous step in Combustion is initiated at 300°C to produce ceramic oxide powder.

[0025] figure 1 for Ce 0.8 SM 0.2 o 1.9 Scanning electron microscope micrograph of ceramic powder, it can be seen that it is in a very bulky state; figure 2 for Ce 0.8 SM 0.2 o 1.9 The X-ray diffraction an...

Embodiment 2

[0027] Preparation of Ce 0.8 SM 0.2 o 1.9 The process of ceramic powder is as follows:

[0028] Take 347.37g of Ce(NO 3 ) 3 ·6H 2 O,88.89g of Sm(NO 3 ) 3 ·6H 2 0, dissolve with deionized water, be prepared as the solution of 1L standard volume with volumetric flask, obtain the nitrate solution that metal ion total concentration is 1mol / L; Get the nitrate solution 23.18ml that last step prepares, get 2.00g glycerin again, Mix the two to obtain a mixed solution, the molar ratio of glycerin and metal ions in this mixed solution is 0.94:1; heat the mixed solution in the previous step at 150°C to evaporate water until the solution becomes viscous; put the viscous solution in the previous step Initiate combustion at 250°C to generate ceramic oxide powder; burn the ceramic oxide powder in the previous step at 300°C for 2 hours to obtain the final Ce 0.8 SM 0.2 o 1.9 Ceramic powder.

Embodiment 3

[0030] According to the method in embodiment 2, change the glycerol consumption in the preparation process, prepare Ce 0.8 SM 0.2 o 1.9 ceramic powder, and analyzed the bulk density and sintered density of the obtained sample at 1300°C, the process is as follows:

[0031] Take 347.37g of Ce(NO 3 ) 3 ·6H 2O,88.89g of Sm(NO 3 ) 3 ·6H 2 O, dissolve with deionized water, be prepared as the solution of 1L standard volume with volumetric flask, obtain the nitrate solution that metal ion total concentration is 1mol / L; Get the total 8 groups of nitrate solution 23.18ml of last step preparation respectively, respectively with 0.50g, 1.00g, 1.50g, 2.00g, 2.50g, 3.00g, 4.00g and 6.00g were mixed with 8 groups of glycerin to obtain a mixed solution; the molar ratio of glycerol to metal ions in the 8 groups of mixed solutions was between 0.23:1 to 2.81:1; heat the mixed solution in the previous step at 150°C to evaporate water until the solution becomes viscous; burn the viscous so...

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Abstract

The invention discloses a method for preparing oxide ceramic powder by a glycerin nitrate combustion method. The method comprises the following specific steps: mixing glycerin and a metal nitrate aqueous solution, wherein the molar ratio of the glycerin to metal ions is in a range of (0.70 to 1) to (0.94 to 1); and facilitating moisture volatilization of the solution under a heating condition, thereby initiating combustion to decompose nitrate into oxide to obtain the ceramic powder. By adopting the method, various oxide ceramic powder can be prepared, and the defect that a large amount of glycerin is used in a conventional method is overcome; and the method is low in cost, and can be used for preparing the ceramic powder with performances of high bulkiness and high sintering activity being equivalent to the performances of ceramic powder prepared by the conventional method.

Description

technical field [0001] The invention relates to a method for preparing oxide ceramic powder by a combustion method. The specific process is to mix an aqueous solution of nitrate with glycerin, volatilize the water in the solution under heating conditions, and initiate combustion. Under the high temperature environment caused by the combustion process, the nitrate Decompose to generate oxides to obtain ceramic powder. Background technique [0002] The basic process of preparing ceramic powder by combustion method is to mix the nitrate aqueous solution corresponding to the ceramic powder with the combustion aid to obtain a mixed solution. The water in this mixed solution is volatilized during the heating process, and the combustion aid starts to burn when it reaches a certain temperature, and the high temperature caused by the combustion promotes the decomposition of nitrate components into oxides to obtain ceramic powder. Combustion aids commonly used in existing research re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/626
CPCC04B35/50C04B35/62605C04B2235/3206C04B2235/3213C04B2235/3225C04B2235/3229C04B2235/3244C04B2235/3275C04B2235/3279C04B2235/3286C04B2235/77
Inventor 李海滨李宝光周公文李阳闫真张诚然王鹏刘良禄郝晓函
Owner YUNNAN UNIV