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Glass permeated zirconia ceramic dental material and its prepn process

A technology of zirconia and glass, used in dental preparations, dentistry, dental prostheses, etc.

Active Publication Date: 2007-03-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports on tetragonal zirconia infiltrated glass.

Method used

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  • Glass permeated zirconia ceramic dental material and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0016] The preparation of embodiment 1~6 infiltration glass

[0017] According to the mass percentage content of each component listed in Table 1, weigh a certain amount of analytically pure SiO 2 , B 2 o 3 、BaCO 3 、La 2 o 3 、Al 2o 3 , Y 2 o 3 , ZrO 2 , CaCO 3 、TiO 2 , CeO 2 and Fe 2 o 3 , respectively, fully mixed and ground with a planetary ball mill, taken out and dried; respectively put the mixed powder in a platinum alloy dry pot, placed in a resistance furnace, and heated to 800°C for 1 to 3 hours in an air atmosphere, and then raised to To 1300 ℃ ~ 1500 ℃, constant temperature 3 ~ 6 hours, then take out at 1000 ℃ and pour into cold water for rapid cooling to form small glass pieces, and finally ball milled into particles with a size of about 1 micron, dried for later use.

[0018] Example

[0019] *The colorant is CeO 2 and Fe 2 o 3 .

Embodiment 7～10 4

[0020] Preparation of Example 7-10 Tetragonal Porous Zirconia Green Body

[0021] Tetragonal zirconia powders stabilized with 3mol% yttria are used as raw materials, and the average particle sizes are 0.97 μm, 2.5 μm, 5.4 μm and 10.9 μm, respectively. Add 3wt% glycerin as a binder, mix evenly, and press it into a sheet-shaped green body under an axial pressure of about 50 MPa, and the relative density of the obtained green body is in the range of 45-50%. According to the relationship between the average particle size of the powder and the sintering temperature shown in Table 2, the green body was sintered at the corresponding sintering temperature for 2 hours in a resistance furnace and in an air atmosphere to form a tetragonal porous zirconia green body. The heating rate is as follows: the first step is to raise the temperature from room temperature to 300°C at a rate of 2K / min, and then keep it at 300°C for 1h; the second step is to raise the temperature to 1100°C at a rate ...

Embodiment 11

[0023] Preparation of Example 11 Zirconia-Glass Composite Material

[0024] The porous tetragonal zirconia body prepared in Examples 7 to 10 is processed into a sheet sample of 30 mm × 30 mm × 4 mm, and then the glass powder prepared in Examples 1 to 6 is adjusted into a powder slurry with dehydrated alcohol, Spread it evenly on the upper surface of the sample (the thickness of the coating depends on the penetration thickness), then dry it in an oven at 70°C for 15 minutes, take it out and put it in a resistance furnace, heat it up to 1150°C in an air atmosphere, keep it warm for 4 hours, and then cool slowly to At room temperature, a dense zirconia-glass dental material can be obtained. XRD analysis was carried out on the phase structure of the infiltrated zirconia-glass dental material. As shown in Figure 1, the main phase of the tetragonal zirconia powder used and the tetragonal porous zirconia green body sintered at 1450 °C were all tetragonal. phase, but still contains p...

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Abstract

The present invention is glass permeated zirconia ceramic dental material and its preparation process, and features that glass is permeated into quadratic porous zirconia ceramic to obtain zirconia-glass material for dental repair. The glass consists of SiO2 15-25 wt%, B2O3 10-30 wt%, BaO 0-38 wt%, La2O3 1-28 wt%, Al2O3 0-12 wt%, Y2O3 2-15 wt%, ZrO2 3-16 wt%, CaO 0-30 wt%, TiO2 0-7 wt%, CeO2 0-2 wt%, and Fe2O3 0-2 wt%. The glass is permeated to porous zirconia ceramic at 1100-1250 deg.c, and the zirconia ceramic maintains its quadratic structure. The glass permeated zirconia ceramic material is suitable for dental repair.

Description

technical field [0001] The invention relates to a glass-infiltrated zirconia all-ceramic dental material and a preparation method thereof, belonging to the field of biological materials. Background technique [0002] All-ceramic dental materials not only have good biocompatibility, but also can vividly reproduce the natural color and color depth of teeth. It is a dental restoration technology integrating health and beauty. It is more and more favored by dentists and patients. It is the future Focus on the research and development of dental restorative technology. [0003] The main difficulty in the application of ceramic materials in dental restoration lies in the difficulty in the preparation of dental crowns. Many materials (such as dense alumina, dense zirconia, etc.) With the advancement of material science and technology, great progress has been made in the preparation technology of all-ceramic crowns (all-ceramic crowns), and a variety of all-ceramic crown preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068C03C10/02C04B35/48A61C13/083A61K6/027
CPCC03C3/068
Inventor 朱庆山余斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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