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Dental zirconia all-ceramic material and preparation method thereof

A zirconia and dental technology, applied in the field of dental zirconia all-ceramic materials and their preparation, can solve problems such as failure to improve the powder microstructure, and achieve the effects of being beneficial to cell proliferation, reducing the probability of occurrence and strong adhesion

Inactive Publication Date: 2020-07-28
南京赛诺特斯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This method only improves the macroscopic properties such as the friction system of the powder from the sintering temperature, but fails to improve the microstructure such as the particle size and particle size distribution of the powder, and improves the phase stability and fatigue resistance of the ceramic body made of the powder. limited

Method used

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  • Dental zirconia all-ceramic material and preparation method thereof
  • Dental zirconia all-ceramic material and preparation method thereof
  • Dental zirconia all-ceramic material and preparation method thereof

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Embodiment 1

[0027] This embodiment discloses a dental zirconia all-ceramic material, which is prepared by using the polyacrylamide gel method to prepare nano-ZrO 2 Synthesis of powder by dry pressing. Conventional preparation of ZrO 2 Powder methods include hydrothermal synthesis, microemulsion, co-precipitation, and sol-gel methods. The polyacrylamide gel method is an improved sol-gel method, which has the advantages of low cost, simple operation, and adjustable powder composition. Nano-ZrO 2 The powder is made of ZrOCl by using 2 ·8H 2 O and ZrO(NO 3 ) 2 2H 2 The gel precursor prepared from the composite zirconium source composed of O is prepared through gel thermal decomposition steps and crystallization steps to obtain powder particle sizes distributed in the range of 60.4 to 82.6 nm. Specifically, ZrOCl 2 ·8H 2 O and ZrO(NO 3 ) 2 2H 2O is configured as a 0.4mol / L aqueous solution at a molar ratio of 1:1. Then, acrylamide (AM) and methylenebisacrylamide (N,N'-methylene b...

Embodiment 2

[0045] The invention also discloses a preparation method of a dental zirconia all-ceramic material, which includes nano-ZrO prepared by polyacrylamide gel method 2 The powder is dry pressed. The nano-ZrO 2 The powder is made of ZrOCl by using 2 ·8H 2 O and ZrO(NO 3 ) 2 2H 2 The gel precursor prepared from the composite zirconium source composed of O is prepared through gel thermal decomposition steps and crystallization steps to obtain powder particle sizes distributed in the range of 60.4 to 82.6 nm. Among them, the gel precursor reaches 85% to 95% decomposition rate in the gel thermal decomposition step, and 90% to 95% ZrO in the crystallization step 2 From tetragonal phase to monoclinic phase.

[0046] According to a preferred embodiment, ZrOCl in the composite zirconium source 2 ·8H 2 O and ZrO(NO 3 ) 2 2H 2 The molar ratio of O is 0.5:1 to 2:1. The thermal decomposition step of the gel is carried out under the condition of 550°C to 570°C. The crystallization...

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Abstract

The invention discloses a dental zirconium oxide all-ceramic material. Nano ZrO2 powder prepared by a polyacrylamide gel method is dry-pressed to synthesize the all-ceramic material. The nano ZrO2 powder is prepared by thermally decomposing and crystallizing a gel precursor, which is prepared from a composite zirconium source composed of ZrOCl2.8H2O and ZrO(NO3)2.2 H2O, and the particle size of nano ZrO2 is in a range of 60.4 to 82.6 nm, the decomposition rate of the gel reaches 85% to 95% in the gel thermal decomposition step, and 90% to 95% of ZrO2 is converted from a tetragonal phase to a monoclinic phase in the crystallization step.

Description

technical field [0001] The invention relates to the technical field of biological materials, in particular to a dental zirconia all-ceramic material and a preparation method thereof. Background technique [0002] With the progress of research on oral restorative materials, all-ceramic restorations technology (All-ceramic restorations technology) with good biocompatibility and aesthetic effect is widely considered to be an ideal restoration method. Among known all-ceramic material systems, zirconia (zirconium oxide, ZrO 2 ) Ceramics have obvious advantages over other materials in terms of mechanical properties such as strength and toughness, so they have become the focus of attention and research on current oral materials. [0003] Zirconia crystals have three structures: monoclinic (m), tetragonal (t) and cubic (c). The critical temperatures of phase transitions among these three phases are 1170°C and 2370°C, respectively. In the oral environment, zirconia ceramics have f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/63C04B35/632C04B38/02C04B38/06
CPCC04B35/48C04B35/622C04B35/6303C04B35/632C04B38/02C04B38/067C04B2235/3206C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3272C04B2235/3279C04B2235/3298C04B2235/3418C04B2235/3427C04B2235/5436C04B2235/5445C04B2235/9661
Inventor 孔令兵张天舒刘银董强
Owner 南京赛诺特斯材料科技有限公司
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