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单向压制成型氧化锆压坯的烧结行为和力学性能。

Sintering behavior and mechanical properties of zirconia compacts fabricated by uniaxial press forming.

机构信息

BK21 project, School of Dentistry, Chonnam National University, Gwangju, Korea.

出版信息

J Adv Prosthodont. 2010 Sep;2(3):81-7. doi: 10.4047/jap.2010.2.3.81. Epub 2010 Sep 30.

DOI:10.4047/jap.2010.2.3.81
PMID:21165274
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2994699/
Abstract

PURPOSE

The purpose of this study was to compare the linear sintering behavior of presintered zirconia blocks of various densities. The mechanical properties of the resulting sintered zirconia blocks were then analyzed.

MATERIALS AND METHODS

Three experimental groups of dental zirconia blocks, with a different presintering density each, were designed in the present study. Kavo Everest® ZS blanks (Kavo, Biberach, Germany) were used as a control group. The experimental group blocks were fabricated from commercial yttria-stabilized tetragonal zirconia powder (KZ-3YF (SD) Type A, KCM. Corporation, Nagoya, Japan). The biaxial flexural strengths, microhardnesses, and microstructures of the sintered blocks were then investigated. The linear sintering shrinkages of blocks were calculated and compared.

RESULTS

Despite their different presintered densities, the sintered blocks of the control and experimental groups showed similar mechanical properties. However, the sintered block had different linear sintering shrinkage rate depending on the density of the presintered block. As the density of the presintered block increased, the linear sintering shrinkage decreased. In the experimental blocks, the three sectioned pieces of each block showed the different linear shrinkage depending on the area. The tops of the experimental blocks showed the lowest linear sintering shrinkage, whereas the bottoms of the experimental blocks showed the highest linear sintering shrinkage.

CONCLUSION

Within the limitations of this study, the density difference of the presintered zirconia block did not affect the mechanical properties of the sintered zirconia block, but affected the linear sintering shrinkage of the zirconia block.

摘要

目的

本研究旨在比较不同密度预烧氧化锆块的线性烧结行为。然后分析所得烧结氧化锆块的力学性能。

材料和方法

本研究设计了三组不同预烧密度的牙科氧化锆块实验组。Kavo Everest® ZS 坯料（Kavo，比伯拉赫，德国）用作对照组。实验组块由商业氧化钇稳定四方氧化锆粉末（KZ-3YF（SD）A型，KCM. 公司，名古屋，日本）制成。然后研究了烧结块的双轴弯曲强度、显微硬度和微观结构。计算并比较了烧结块的线性烧结收缩率。

结果

尽管预烧密度不同，但对照组和实验组的烧结块表现出相似的力学性能。然而，烧结块的线性烧结收缩率取决于预烧块的密度。随着预烧块密度的增加，线性烧结收缩率降低。在实验组块中，每个块的三个部分根据区域显示出不同的线性收缩率。实验组块的顶部显示出最低的线性烧结收缩率，而实验组块的底部显示出最高的线性烧结收缩率。

结论

在本研究的限制范围内，预烧氧化锆块的密度差异不会影响烧结氧化锆块的力学性能，但会影响氧化锆块的线性烧结收缩率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/65d679bdfb55/jap-2-81-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/ce2b1d0abf66/jap-2-81-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/3da808db8675/jap-2-81-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/2d468f8462c2/jap-2-81-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/75dbd0d10e0b/jap-2-81-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/c375ddcd7e65/jap-2-81-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/65d679bdfb55/jap-2-81-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/ce2b1d0abf66/jap-2-81-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/3da808db8675/jap-2-81-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/2d468f8462c2/jap-2-81-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/75dbd0d10e0b/jap-2-81-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/c375ddcd7e65/jap-2-81-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6e/2994699/65d679bdfb55/jap-2-81-g006.jpg

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