Dental ceramic material and its preparation method

A porcelain and dental technology, applied in dentures and other directions, can solve the problems of large drying and firing shrinkage, difficult to mix evenly, cracking of the porcelain layer, etc. Effect

Inactive Publication Date: 2008-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanometer and ultrafine powders are difficult to mix evenly, and the drying and firing shrinkage is large, which can easily lead to cracking and peeling of the ceramic layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Put 40g of leucite powder with an average particle size of 53nm and 4g of alumina powder with an average particle size of 80nm in a beaker, add 100g of absolute ethanol, and place in an ultrasonic tank while stirring and ultrasonicating for 60 minutes ;

[0026] (2) 156 g of frit powder with an average particle size of 25 μm is placed in a ball mill and mixed with the nano-powder processed in step (1) and 50 g of absolute ethanol, with alumina balls as the grinding medium, and the ball milling time is 3 hours ;

[0027] (3) Precipitate the powder mixed in step (2), remove the supernatant and dry at 100°C;

[0028] (4) Mix the powder dried in step (3) with 10wt% polyvinyl alcohol aqueous solution in a stirrer at a weight ratio of 95:5, then put it in a plastic bag and evacuate to 80kPa;

[0029] (5) Place the powder and plastic bag in step (4) in a cold isostatic press, pressurize to 200MPa, and keep for 3 minutes;

[0030] (6) Take out the powder block obtained i...

Embodiment 2

[0033] (1) Put 56g of leucite powder with an average particle diameter of 20nm, 2g of alumina powder with an average particle diameter of 80nm, and 2g of zirconia powder with an average particle diameter of 500nm in a beaker, add 160g of absolute ethanol , placed in an ultrasonic tank while stirring and ultrasonicating for 30 minutes;

[0034] (2) 140 g of frit powder with an average particle size of 25 μm is mixed with the nano-powder processed in step (1) and 40 g of absolute ethanol in a planetary mill, with zirconia balls as the grinding medium, and the grinding time is 2 Hour;

[0035] (3) Precipitate the powder mixed in step (2), remove the supernatant and dry at 110°C;

[0036] (4) Stir and mix the powder dried in step (3) and 10wt% polyvinyl alcohol aqueous solution in a beaker at a weight ratio of 95:5 for 30 minutes, then put it in a plastic bag and evacuate to 30kPa;

[0037] (5) Place the powder and plastic bag in step (4) in a cold isostatic press, pressurize to...

Embodiment 3

[0041] (1) Put 45g of leucite powder with an average particle diameter of 53nm, 2g of alumina powder with an average particle diameter of 80nm, and 2g of zirconia powder with an average particle diameter of 500nm in a beaker, add 100g of absolute ethanol , placed in an ultrasonic bath while stirring and ultrasonicating for 50 minutes;

[0042] (2) 151 g of frit powder with an average particle size of 25 μm is mixed with the nano-powder processed in step (1) and 40 g of absolute ethanol in a planetary mill, with zirconia balls as the grinding medium, and the ball milling time is 1 Hour;

[0043] (3) Precipitate the powder mixed in step (2), remove the supernatant and dry at 120°C;

[0044] (4) Stir and mix the dried powder in step (3) with 10wt% polyvinyl alcohol aqueous solution in a weight ratio of 95:5 in a beaker for 30 minutes, then put it in a plastic bag and evacuate to 100kPa;

[0045] (5) Place the powder and plastic bag in step (4) in a cold isostatic press, pressur...

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Abstract

A dental ceramic material for dental department is prepared through mixing the superfine particles of leucite, alumina and zirconium oxide with alcohol, stirring, mixing it with frit powder, adding alcohol, grinding, drying, mixing with adhesive, vacuumizing, compression, grinding for granulating and sieving.

Description

technical field [0001] The invention relates to the field of dental ceramic materials and nanotechnology, in particular to a dental ceramic material containing nanometer or ultrafine powder for dental restoration and a preparation method thereof. Background technique [0002] Dental ceramic materials have become the most important method for the treatment of tooth loss due to their good biocompatibility, wear resistance and corrosion resistance, natural and lifelike color since they were used clinically. Among them, the most widely used metal-based ceramic material is a composite of metal and ceramic materials made by high-temperature firing. It not only has the characteristics of high strength and toughness of metal materials, good edge adhesion, etc., but also has vivid ceramic color, corrosion resistance and With good wear resistance and strong self-cleaning effect, it is a commonly used and ideal restoration material for clinical restoration of teeth and dentition defect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/109C04B35/622A61C13/083
Inventor 吴建青杨金平
Owner SOUTH CHINA UNIV OF TECH
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