Medical-stone-doped yttria-stabilized zirconia health care ball formula and manufacturing method thereof

A technology of yttrium-stabilized zirconia and a manufacturing method, which is applied to the formula of yttrium-stabilized zirconia doped medical stone health care ball and its manufacturing field, can solve the problems of high cost, difficult market acceptance, rough and porous appearance, complicated production process, etc. The effect of large, good wear resistance and low production cost

Active Publication Date: 2013-08-21
湖南华联特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of zirconia bearing grade standard balls is first pressed out with dry powder as a block semi-finished product, and then processed into a spherical shape by an engraving machine, then fired, then ground, and then polished. The production process is complicated, the cost is high, and the pass rate is high. Low
[0005] In addition, direct isostatic pressing with dry powder, due to reasons such as rubber molds and materials, the roundness of the semi-finished product is very poor, and the amount of post-processing is large. If the finished product is directly ground without engraving, the grinding process (the zirconia product itself is very wear-resistant) ) cost is too high for the market to accept
[0006] The technology of directly pressing the spherical semi-finished product with dry powder through a fully automatic press, and then firing it has always been a technology that zirconia ceramics manufacturers want to complete but have not completed. The main defect is cracks, which are difficult to shape.
[0007] It is not acceptable to make medical stone into balls alone. First, its appearance is rough and porous, which is not beautiful; damaged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0034] A formula of yttrium-stabilized zirconia-doped medical stone health care ball and a production method thereof. Considering the health benefits and the technical requirements of high-end massage equipment, yttrium-stabilized zirconia was selected to be doped with medical stone, and standard ceramic balls were produced by dry powder pressing process.

[0035] Formula of the present invention and preparation method thereof are as follows:

[0036]1. Convert the yttrium-stabilized zirconia slurry into dry material and mix it with white medical stone powder at a ratio of 100:1. The particle size of the medical stone powder is less than 2 microns, white, and the fineness D50 of the zirconia slurry is less than 500 nanometers , After mixing, ball mill in a ball mill for 24 hours, and the mixing ratio of adding water is material: ball stone: water = 1:3:0.5.

[0037] 2. Take out the ball after mixing completely, and add the following colloid while stirring in the stirring mill...

Embodiment 2

[0045] A method for manufacturing yttrium-stabilized zirconia standard bearing balls. The invention adopts a dry powder pressing production process. Its specific process is as follows:

[0046] 1. Put the yttrium-stabilized zirconia powder into the ball mill according to the ratio, coarsely grind the large balls, finely grind the small balls, and ball-mill the slurry until the fineness D50 is 300 nanometers.

[0047] 2. After the slurry is out of the ball, add the following colloid while stirring in the stirring mill: based on 100 parts by weight of the dry mixture in the above 1, add 1.0 parts by weight of polyethylene glycol (PEG) successively, Add 0.5 parts by weight of stearic acid, add 0.5 parts by weight of gum arabic, add 0.3 parts by weight of antifoaming agent, and add 1.5 parts by weight of polyvinyl alcohol (PVA). Among them: PEG is added in the form of 10% aqueous solution, stearic acid is added in the form of 20% alcohol solution, gum arabic is added in the form...

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Abstract

The invention relates to a medical-stone-doped yttria-stabilized zirconia health care ball formula and a manufacturing method thereof. Part of medical stones is doped in yttria-stabilized zirconia, so that the formula has a health-care function of medial stones. The manufacturing method comprises the following steps of: with the adoption of a special colloid formula, first, pre-compressing dry power at low pressure; then, moulding at high pressure by isostatic pressing; sintering at 1400-1530 DEG C; and then, grinding and polishing to obtain the product provided by the invention. The manufacturing process flow is as follows: proportioning of yttria-stabilized zirconia slurry or powder without colloid and superfine power of medical stones; ball-milling and homogenizing; stirring and grinding (adding special formula colloid); spraying, drying and palletizing; pre-pressing; carrying out isostatic pressing; sintering; grinding; polishing; and preparing the medical stone doped yttria-stabilized zirconia health care ball. In addition, yttria-stabilized zirconia ceramic bearing balls can be produced without doping the medical stones to the yttria-stabilized zirconia, wherein other processes are unchanged. The three-point bending strength of the obtained product is greater than or equal to 600MPa, the fracture toughness is greater than or equal to 10MPa.ml/2 and the hardness (Hv) is greater than or equal to 1500GMa.

Description

technical field [0001] The invention belongs to a new ceramic material structural component for health care massage and its manufacturing method, in particular to a ball or bearing standard ball formula for ceramic health care massage equipment and its manufacturing method. Due to the chemical inertness of zirconia, it is The stone is mainly used for wrapping and does not affect the health care function of the medical stone. The obtained product is mainly used in high-end health care massage equipment, and the yttrium-stabilized zirconia standard ball without medical stone can be applied to ceramic bearings. Background technique [0002] The present invention has two technical backgrounds: health care massage effect and ceramic bearing ball. [0003] The health care industry is currently in the ascendant at home and abroad, with a huge market and huge development potential. Among them, health care massage equipment is accepted by the general public, and is more environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/632C04B35/622
Inventor 张亮李顺禄
Owner 湖南华联特种陶瓷有限公司
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