A kind of glass powder for all-ceramic dental porcelain and preparation method thereof

The technology of glass powder and porcelain teeth is applied in the field of glass powder for porcelain enamel for all-ceramic teeth and its preparation. sexual effect

Active Publication Date: 2017-09-12
FOSHAN BAIRUI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of this invention is to overcome the shortcomings of current products such as low transparency, easy to bounce porcelain, and poor acid resistance.

Method used

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  • A kind of glass powder for all-ceramic dental porcelain and preparation method thereof
  • A kind of glass powder for all-ceramic dental porcelain and preparation method thereof
  • A kind of glass powder for all-ceramic dental porcelain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepare materials according to the following quality, and fully mix them uniformly:

[0023]

[0024] (2) Place the homogeneously mixed raw materials in step (1) in a frit furnace at room temperature, raise the temperature to 650° C., and keep it warm for 20 minutes, then heat it to 1400° C., and keep it warm for 120 minutes, so that the raw materials are fully fused into molten glass;

[0025] (3) Pour the glass liquid obtained in step (2) into deionized water for water quenching, and the glass liquid forms small glass particles through rapid cooling;

[0026] (4) heat preservation at 100~150° C. for 30 minutes, and dry the glass frit after water quenching;

[0027] (5) Filter out the glass particles obtained in step (4) and grind them with a planetary ball mill to a glass powder with a particle size of 3-5 μm to obtain glass powder for all-ceramic teeth;

[0028] (6) After testing, the softening point of the glass powder is 581°C, and the coefficient of therma...

Embodiment 2

[0030] (1) Prepare materials according to the following quality, and fully mix them uniformly:

[0031]

[0032] (2) Place the homogeneously mixed raw materials in step (1) in a frit furnace at room temperature, raise the temperature to 650°C and keep it warm for 20 minutes, then heat it to 1420°C and keep it warm for 120 minutes, so that the raw materials are fully melted into molten glass;

[0033] (3) Pour the glass liquid obtained in step (2) into deionized water for water quenching, and the glass liquid forms small glass particles through rapid cooling;

[0034] (4) heat preservation at 100~150° C. for 30 minutes, and dry the glass frit after water quenching;

[0035] (5) Filter out the glass particles obtained in step (4) and grind them with a planetary ball mill to a glass powder with a particle size of 3-5 μm to obtain glass powder for all-ceramic teeth;

[0036] (6) After testing, the softening point of the glass powder is 587°C, and the coefficient of thermal exp...

Embodiment 3

[0038] (1) Prepare materials according to the following quality, and fully mix them uniformly:

[0039]

[0040] (2) Place the homogeneously mixed raw materials in step (1) in a room temperature frit furnace, raise the temperature to 650°C, and then keep it warm for 20 minutes, then heat it to 1450°C, and keep it warm for 150 minutes, so that the raw materials are fully melted into molten glass;

[0041] (3) Pour the glass liquid obtained in step (2) into deionized water for water quenching, and the glass liquid forms small glass particles through rapid cooling;

[0042] (4) heat preservation at 100~150° C. for 30 minutes, and dry the glass frit after water quenching;

[0043] (5) Filter out the glass particles obtained in step (4) and grind them with a planetary ball mill to a glass powder with a particle size of 3-5 μm to obtain glass powder for all-ceramic teeth;

[0044] (6) After testing, the softening point of the glass powder is 595°C, and the coefficient of thermal...

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Abstract

The invention provides a glass powder for all-ceramic dental porcelain and a preparation method thereof. The glass powder is composed of the following components in mass ratio: Y2O32-5%, SiO265-70%, Al2O310-16%, B2O312-20%, Li2O1~5%. The above materials are fully mixed and evenly heated from room temperature to 650-700°C and then held for 20 minutes, then heated to 1350-1450°C and held for 120-180 minutes to fully melt the raw materials into a liquid state, and then quenched with deionized water to form glass particles. The glass particles are ball-milled to 3-5 μm, and the glass powder for all-ceramic teeth can be obtained. The glass powder obtained in the present invention is characterized in that it does not contain K2O, Na2O and other components, and has the advantages of high transparency, good bending resistance, and good acid resistance. The coefficient is 8.8~9.2×10‑6 / ℃.

Description

technical field [0001] The invention relates to a glass powder for all-ceramic dental porcelain and a preparation method thereof. The prepared glass powder has the advantages of high transparency, good flexural resistance, good acid resistance and the like, and is mainly used in the field of dental all-ceramic restoration. technical background [0002] Since the clinical application of all-ceramic dental materials began in the 1980s, it has developed from the initial single-layer material to laminated composite materials, from glass ceramics to oxide ceramics; the processing technology has developed from porcelain and casting to computer-aided design and machining precision cutting process. The current all-ceramic restorations have good marginal fitness and good mechanical properties, which can meet the requirements of most dental restorations. All-ceramic materials are favored by prosthodontists and patients due to their excellent aesthetic effect and good biocompatibility...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00
Inventor 王亚东侯金章欧阳雪琼关海斌庞瑞君
Owner FOSHAN BAIRUI NEW MATERIAL TECH CO LTD
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