Preparation method for veneering porcelain used for alumina all-ceramic crown

A technology of alumina and porcelain decoration, which is applied in the field of preparation of rare metal materials, and can solve problems such as high prices and limited development

Inactive Publication Date: 2016-04-27
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the porcelain powders for all-ceramic crowns produced by foreign companies have good performance in terms of perfo

Method used

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Embodiment Construction

[0016] A method for preparing porcelain for alumina all-ceramic crowns, comprising the following steps:

[0017] Step 1: Prepare porcelain powder:

[0018] Weigh various compounds with an electronic balance, and the required B 2 0 3 、K 2 0. Na 2 0. The amount of CaO is converted into H 3 B0 3 、K 2 C0 3 、Na 2 C0 3 , CaC0 3 Add the raw materials to deionized water and ball mill; place the obtained slurry in an oven to dry, put it into an alumina crucible after drying, heat it in an electric furnace, take it out and pour the melt into cold water to quench; The quenched glass-like substance is ground and passed through a sieve with an aperture of 61 μmm to obtain porcelain powder.

[0019] Step 2: Preparation of Porcelain:

[0020] Take 0.2g of porcelain powder, mix thoroughly with deionized water, smear it on the alumina ceramic bottom crown, heat it in an electric furnace, and cool the furnace to room temperature; the thickness of the decorative porcelain formed afte...

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Abstract

The invention relates to the technical field of preparation of rare metal materials, specifically to a preparation method for veneering porcelain used for an alumina all-ceramic crown. The preparation method comprises the following steps: weighing a variety of compounds by using an electronic balance and respectively converting the amounts of desired B2O3, K2O, Na2O and CaO into the amounts of H3BO3, K2CO3, Na2CO3 and CaCO3; adding raw materials into deionized water and carrying out ball milling; drying slurry, putting dried slurry into an alumina crucible, delivering the alumina crucible into an electric furnace, carrying out heating, taking out a melt and pouring the melt into cold water for cold quenching; grounding glassy mass obtained after quenching and carrying out sieving with sieve with a bore diameter of 61 [mu]mm so as to obtain baked porcelain powder; weighing 0.2 g of the baked porcelain powder, uniformly blending the baked porcelain powder with deionized water, smearing an alumina ceramic bottom crown with the obtained mixture, delivering the alumina ceramic bottom crown to the electric furnace for heating and carrying out cooling to room temperature in the furnace; and carrying out sintering so as to form the veneering porcelain with a thickness of about 1.5 mm. The microstructure of the baked porcelain powder obtained after sintering is microcrystalline glass, and the thermal expansion coefficient of the baked porcelain powder is 7.2 * 10 <-6>/K. The baked porcelain powder and alumina ceramic have good thermal matching performance; and thermal shock resistance temperature reaches 240 DEG C.

Description

technical field [0001] The invention relates to the technical field of preparation of rare metal materials, in particular to a method for preparing decorative porcelain for alumina all-ceramic crowns. Background technique [0002] With the continuous development of science and technology and the improvement of people's living standards, dental restoration materials have received more and more attention. All-ceramic restorations with better biocompatibility and aesthetic performance have become the main development trend of dental fixed restorations. one. All-ceramic restorations generally use glass-infiltrated alumina and other high-strength ceramic materials to prepare the bottom crown, and the surface is coated with special porcelain powder, which is sintered at the temperature of porcelain to form a decorative porcelain similar to tooth enamel, so that the all-ceramic restoration has The color and luster comparable to real teeth, to achieve the purpose of real ones. Por...

Claims

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Application Information

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IPC IPC(8): C04B41/87C03C10/02
CPCC04B41/5023C03C10/00C04B41/009
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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