Domestic ceramic raw material whiteness proficiency testing sample

Abstract

Provided is a domestic ceramic raw material whiteness proficiency testing sample, and belongs to the technical field of interlaboratory proficiency testing. The proficiency testing sample is prepared from zirconia particles of which the content is bigger than 99% and the average particle size is smaller than 74 micrometers, and is characterized in that the zirconia particles are prepared by adopting a zirconium compound as a precursor and utilizing a chemical precipitation method through zirconium compound hydrolysis-washing-calcinating-grinding, and the whiteness proficiency testing sample is prepared from the zirconia particles through a whiteness uniformity and stability test after pelleting. The domestic ceramic raw material whiteness proficiency testing sample is high in whiteness uniformity and stability, meets the requirements of the proficiency testing sample, makes up the gap of the field of current inland domestic ceramic raw material whiteness proficiency testing, and provides technical support for developing laboratory domestic ceramic raw material whiteness proficiency testing.

Description

technical field

[0001] The invention discloses a whiteness proficiency test sample of a daily-use ceramic raw material, which belongs to the technical field of inter-laboratory proficiency test. Background technique

[0002] Proficiency Testing (Proficiency Testing) refers to the use of inter-laboratory comparisons to determine the calibration / testing capabilities of laboratories. At present, various laboratory proficiency testing activities have become an important basis for evaluating a laboratory's testing level, and are increasingly valued by relevant government departments and third-party testing laboratories. As an important indicator in the traditional ceramic industry, the whiteness of daily-use ceramics plays a very important role in the field of daily-use ceramics. Therefore, how to ensure the detection ability of ceramic whiteness has a very important impact on improving the quality of ceramics. In order to improve the testing ability of ceramic whiteness, it wil...

Examples

Embodiment 1

[0025] Embodiment 1 is the best embodiment.

[0026] Example 1

[0027] (1) Preparation of ultrafine zirconia:

[0028] Weigh 50.00 g of zirconium oxychloride octahydrate into a 1 L three-neck flask, add 540 ml of distilled water, slowly add 90 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; Vacuum filtration, washed 4 times with double distilled water, when the pH is 7.0, stop washing, put the sample in an oven and dry it at 105°C for 24 hours, then calcined in a muffle furnace at 380°C for 3h, the calcined sample After cooling, put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved.

[0029] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.91%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 23.55 μm.

[0030] (2) Uniformity and stability testing:

[0031...

Embodiment 2

[0052] (1) Preparation of ultrafine zirconia:

[0053] Weigh 50.00 g of zirconium tetrachloride in a 1 L three-necked flask, add 390 ml of distilled water, slowly add 65 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; vacuum filter the white precipitate prepared above , washed 5 times with double distilled water, when the pH was 7.1, stop washing, put the sample in an oven and dry at 100°C for 25 hours, then calcined in a muffle furnace at 385°C for 4h, after cooling the calcined sample Put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved and placed in a desiccator.

[0054] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.86%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 29.97 μm.

[0055] (2) Uniformity and stability testing:

[0056] Detect its unifor...

Embodiment 3

[0067] (1) Preparation of ultrafine zirconia:

[0068] Weigh 50.00 grams of zirconium oxychloride octahydrate into a 1 L three-neck flask, add 500 ml of distilled water, slowly add 100 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; Vacuum filtration, washed 4 times with twice distilled water, when the pH is 7.0, stop washing, put the sample in an oven and dry it at 110°C for 26 hours, then calcinate it in a muffle furnace at 500°C for 4h, and the calcined sample After cooling, put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved.

[0069] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.45%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 31.09 μm.

[0070] (2) Uniformity and stability testing:

[0071] Take a 15.00g sample and place it in the mold of the ...

technical field

[0001] The invention discloses a whiteness proficiency test sample of a daily-use ceramic raw material, which belongs to the technical field of inter-laboratory proficiency test. Background technique

[0002] Proficiency Testing (Proficiency Testing) refers to the use of inter-laboratory comparisons to determine the calibration / testing capabilities of laboratories. At present, various laboratory proficiency testing activities have become an important basis for evaluating a laboratory's testing level, and are increasingly valued by relevant government departments and third-party testing laboratories. As an important indicator in the traditional ceramic industry, the whiteness of daily-use ceramics plays a very important role in the field of daily-use ceramics. Therefore, how to ensure the detection ability of ceramic whiteness has a very important impact on improving the quality of ceramics. In order to improve the testing ability of ceramic whiteness, it wil...

Examples

Embodiment 1

[0025] Embodiment 1 is the best embodiment.

[0026] Example 1

[0027] (1) Preparation of ultrafine zirconia:

[0028] Weigh 50.00 g of zirconium oxychloride octahydrate into a 1 L three-neck flask, add 540 ml of distilled water, slowly add 90 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; Vacuum filtration, washed 4 times with double distilled water, when the pH is 7.0, stop washing, put the sample in an oven and dry it at 105°C for 24 hours, then calcined in a muffle furnace at 380°C for 3h, the calcined sample After cooling, put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved.

[0029] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.91%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 23.55 μm.

[0030] (2) Uniformity and stability testing:

[0031...

Embodiment 2

[0052] (1) Preparation of ultrafine zirconia:

[0053] Weigh 50.00 g of zirconium tetrachloride in a 1 L three-necked flask, add 390 ml of distilled water, slowly add 65 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; vacuum filter the white precipitate prepared above , washed 5 times with double distilled water, when the pH was 7.1, stop washing, put the sample in an oven and dry at 100°C for 25 hours, then calcined in a muffle furnace at 385°C for 4h, after cooling the calcined sample Put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved and placed in a desiccator.

[0054] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.86%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 29.97 μm.

[0055] (2) Uniformity and stability testing:

[0056] Detect its unifor...

Embodiment 3

[0067] (1) Preparation of ultrafine zirconia:

[0068] Weigh 50.00 grams of zirconium oxychloride octahydrate into a 1 L three-neck flask, add 500 ml of distilled water, slowly add 100 ml of 30% ammonia water dropwise with a dropping funnel, and stir vigorously for 1 hour to obtain a white precipitate; Vacuum filtration, washed 4 times with twice distilled water, when the pH is 7.0, stop washing, put the sample in an oven and dry it at 110°C for 26 hours, then calcinate it in a muffle furnace at 500°C for 4h, and the calcined sample After cooling, put it into an electromagnetic pulverizer for grinding, and the ground powder is sieved.

[0069] The zirconia content of the sample was analyzed by X-ray fluorescence spectroscopy to be 99.45%, and the average particle size of the sample was measured by a laser scattering particle size distribution analyzer to be 31.09 μm.

[0070] (2) Uniformity and stability testing:

[0071] Take a 15.00g sample and place it in the mold of the ...

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