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Alumina all-ceramic dental prosthetic material and preparation method thereof

A restoration material, alumina technology, applied in dental preparations, dentistry, dental prosthesis and other directions, can solve the problem of not preparing alumina all-ceramic dental restoration materials, and achieves convenient large-scale industrial production, novel and simple preparation method, Small grain effect

Inactive Publication Date: 2017-05-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few researches on alumina all-ceramic dental restoration materials in China, and no commercially available alumina all-ceramic dental restoration materials have been prepared.

Method used

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  • Alumina all-ceramic dental prosthetic material and preparation method thereof
  • Alumina all-ceramic dental prosthetic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An alumina all-ceramic dental restorative material, the raw material of which is 99.65wt.% Al with a particle size of 170nm 2 o 3 , 50nm 0.175wt.% ZrO 2 powder and 80nm 0.175wt.% MgO powder.

[0022] A preparation method of an alumina all-ceramic dental restorative material, the steps are as follows:

[0023] (1) Raw material composition design: with 99.65wt.% Al of 170nm 2 o 3 As the main material, with 50nm0.175wt.%ZrO 2 powder and 80nm 0.175wt.% MgO powder as additives;

[0024](2) Mixing of raw materials: Wet ball milling process is adopted, alcohol is used as dispersant, corundum is used as grinding ball, raw material: grinding ball: alcohol mass ratio is 1:2:3, mixing on planetary ball mill for 12h, using Pass through a 200-mesh sieve after drying in a rotary evaporator;

[0025] (3) After sieving, the powder is subjected to two-way dry pressing with a pressure of 200MPa;

[0026] (4) Pre-burning: The formed sample is pre-fired in a medium-temperature air ...

Embodiment 2

[0031] An alumina all-ceramic dental restorative material, the raw material of which is 99.75wt.% Al with a particle size of 170nm 2 o 3 , 0.125wt.% ZrO at 50nm 2 Powder, 0.125wt.% MgO powder of 80nm.

[0032] A preparation method of an alumina all-ceramic dental restorative material, the steps are as follows:

[0033] (1) Raw material composition design: with 99.75wt.% Al of 170nm 2 o 3 As the main material, with 50nm0.125wt.%ZrO 2 Powder and 80nm 0.125wt.% MgO powder as additives;

[0034] (2) Mixing of raw materials: Wet ball milling process is adopted, alcohol is used as dispersant, corundum is used as grinding ball, raw material: grinding ball: alcohol mass ratio is 1:2:3, mixing on planetary ball mill for 12h, using Pass through a 200-mesh sieve after drying in a rotary evaporator;

[0035] (3) After sieving, the powder is subjected to two-way dry pressing with a pressure of 200MPa;

[0036] (4) Pre-burning: The formed sample is pre-fired in a medium-temperature ...

Embodiment 3

[0041] An alumina all-ceramic dental restorative material, the raw material of which is 99.8wt.% Al with a particle size of 170nm 2 o 3 , 0.1wt.% ZrO at 50nm 2 Powder, 0.1wt.% MgO powder of 80nm.

[0042] A preparation method of an alumina all-ceramic dental restorative material, the steps are as follows:

[0043] (1) Raw material composition design: with 99.8wt.% Al of 170nm 2 o 3 As the main material, with 50nm0.1wt.%ZrO 2 powder and 80nm 0.1wt.% MgO powder as additives;

[0044] (2) Mixing of raw materials: Wet ball milling process is adopted, alcohol is used as dispersant, corundum is used as grinding ball, raw material: grinding ball: alcohol mass ratio is 1:2:3, mixing on planetary ball mill for 12h, using Pass through a 200-mesh sieve after drying in a rotary evaporator;

[0045] (3) After sieving, the powder is subjected to two-way dry pressing with a pressure of 200MPa;

[0046] (4) Pre-burning: The formed sample is pre-fired in a medium-temperature air furnac...

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Abstract

The invention discloses an alumina all-ceramic dental prosthetic material and a preparation method thereof. With 170nm of 99.65wt.%-99.8wt.% Al2O3 as a main ingredient and 500nm of 0.10wt.%-0.175wt.% of ZrO2 powder and 80nm of 0.10wt.%-0.175wt.% of MgO powder as additives, the high-intensity semitransparent alumina sintered body (the dental prosthetic material), which is higher than 99.5% in relative density, is prepared by mixing the main ingredient and the additives by virtue of a wet process according to proportions, conducting drying, compression molding and pre-sintering, then conducting step-step rapid sintering in an induction furnace, and then conducting annealing heat treatment, wherein in the entire process, a sample, which becomes black due to deoxidization in a vacuum rapid sintering process, is oxidized once again and becomes white. The high-intensity and light-transparent alumina ceramic sintered body is uniform in microstructure, and average grain size is less than 2.0 [mu]m, three-point-bending intensity reaches 690MPa to the greatest extent and maximum hardness is greater than 19GPa; and meanwhile, the alumina all-ceramic material is adjustable in light transmittance.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials and its preparation, and in particular relates to a high-strength translucent alumina all-ceramic dental restorative material with three-bridge connection used in the field of stomatology and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of stomatology, various dental restoration materials have become a research hotspot. At present, the treatment methods for tooth defects are still using various natural materials or artificial materials to restore the ecology and functions of the damaged parts. For dental restorative materials, the main service condition is the oral environment. Therefore, on the one hand, it needs to have good biocompatibility and a gloss similar to real teeth; on the other hand, it needs to have good mechanical properties. Therefore, dental restoration materials have also shifted from early metals and alloys t...

Claims

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Application Information

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IPC IPC(8): A61K6/02C04B35/10C04B35/63C04B35/64
CPCC04B35/10C04B35/6303C04B35/64C04B2235/3206C04B2235/3244A61K6/818
Inventor 杨建锋郭海霞刘凯凯徐照芸曲囡张亚明
Owner XI AN JIAOTONG UNIV
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