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Zirconia particles

A technology of zirconia particles and zirconia, applied in zirconia, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as light transmittance reduction

Active Publication Date: 2012-10-03
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Decrease in light transmittance as primary particle size increases and / or degree of association between primary particles increases

Method used

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  • Zirconia particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] In a glass vessel, MEEAA (130.55 grams) was dissolved in a zirconium acetate solution (735 grams). The mixture (ie, the aqueous precursor solution) was placed in a large flat glass dish and dried overnight in a forced-air oven at 75°C to 85°C to obtain 322 grams of dry mixed salt (ie, the concentrated precursor).

[0163] A sample (54 grams) of the dry mixed salt was dissolved in 900 grams of DI water. The clear solution was placed in a 2 liter PARR high pressure reaction vessel equipped with a stirrer. The reactor was purged with nitrogen and heated electrically with stirring to a temperature of 185°C. The mixture was maintained at 185°C for 15 minutes, then the oven was switched off and the mixture was stirred for an additional 15 minutes. At this point, remove the container from the heater and cool rapidly in an ice-water bath. This step provides a liquid phase and a solid phase. The liquid was siphoned off and the solid phase was placed in a glass dish and place...

Embodiment 2

[0167] In a glass vessel, MEEAA (130.55 grams) was dissolved in a zirconium acetate solution (735 grams). The mixture was placed in a large flat glass dish and dried overnight in a forced air oven at 75°C to 85°C to obtain 322 grams of dry mixed salt.

[0168] A sample (30 grams) of dry mixed salts was dissolved in 985 grams of DI water. The clear solution was placed in a 2 liter PARR high pressure reaction vessel equipped with a stirrer. The reactor was purged with nitrogen and heated electrically to a temperature of 185° C. within 1 hour with stirring. Turn off the electric stove, remove the container from the heater, and cool rapidly in an ice-water bath. This step provides a liquid phase and a solid phase. The liquid was siphoned off and the solid phase was placed in a glass dish and placed in a preheated forced air drying oven at 75°C to 85°C to obtain a light colored brittle material (ie dried solid).

[0169] A sample of the dried solid (2.0 grams) was dispersed in ...

Embodiment 3

[0172] In a glass container, MEEAA (26.46 grams) was dissolved in a zirconium acetate solution (735 grams). The mixture was placed in a large flat glass dish and dried overnight in a forced air oven at 75°C to 85°C to obtain a dry mixed salt.

[0173] A sample (81 grams) of the dry mixed salt was dissolved in 1,350 grams of DI water. The clear solution was placed in a 2 liter PARR high pressure reaction vessel equipped with a stirrer. The reactor was purged with nitrogen and heated electrically with stirring to a temperature of 185°C. The mixture was maintained at 185°C for 15 minutes. At this point the vessel was removed from the heater and rapidly cooled in an ice-water bath. This step provides a liquid phase and a solid phase. The liquid was siphoned off and the solid phase was placed in a glass dish and placed in a preheated forced air drying oven at 75°C to 85°C to obtain a light colored brittle material (ie dried solid). This procedure was repeated three more times ...

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Abstract

Zirconia particles, methods of making zirconia particles, composite materials that contain the zirconia particles, methods of making the composite materials, and zirconia sols that contain the zirconia particles are described. The zirconia particles are substantially non-associated and have an average size no greater than 50 nanometers and may contain yttrium. The zirconia particles are prepared by a method that includes two separate hydrothermal treatments.

Description

technical field [0001] The present invention relates to zirconia particles, methods of making zirconia particles, zirconia sols comprising zirconia particles, composite materials comprising zirconia particles, and methods of making composite materials. Background of the invention [0002] Zirconia particles can be added to the organic matrix to increase the refractive index or X-ray opacity of the organic matrix while retaining the light transmission of the organic matrix. The extent to which the x-ray opacity and / or the refractive index of the organic matrix can be increased depends on the percentage loading of zirconia in the organic matrix and the properties of the zirconia particles, such as crystallinity, crystal structure, primary particle size and primary particle size. the degree of association between them. [0003] Crystalline zirconia generally has a higher refractive index and greater X-ray scattering power than materials comprising amorphous zirconia. Light tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02C04B35/119C09C1/00C09K23/00
CPCC01P2002/70C09C1/00C01P2002/88C01P2004/64C01G25/02B82Y30/00Y10T428/25Y10T428/31504Y10T428/31786Y10T428/31551Y10T428/31681Y10T428/31609Y10T428/31855Y10T428/31529
Inventor 罗伯特·S·戴维森布兰特·U·科尔布丹尼·B·安德森詹姆斯·A·希金斯马克·J·亨德里克森约翰·T·布拉迪
Owner 3M INNOVATIVE PROPERTIES CO
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