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

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...

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