Millimeter-Wave Sintering of High Pure Alumina – Microstructure and Mechanical Properties
Millimeter-Wave Sintering of High Pure Alumina – Microstructure and Mechanical Properties
复制标题
高纯氧化铝的毫米波烧结——微观结构和机械性能
DOI：
10.1007/978-3-540-32944-2_61
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Akinobu Yoshikawa
中科院分区：
文献类型：
--
作者：
Y. Makino;S. Miyake;S. Sano;H. Saito;B. Kyoh;H. Kuwahara;Akinobu Yoshikawa
从结构和机械性能的角度研究了高纯氧化铝的毫米波（MM）烧结特性，并与传统烧结氧化铝进行了比较。 MM烧结在1250℃下得到了接近完全致密的纯氧化铝，表明与传统烧结相比，烧结温度降低了约250℃。通过SEM观察和XRD测量，发现在MM加热1250℃和传统加热1500℃下烧结的两种氧化铝中检测到相似的晶粒尺寸（2μm至3μm）和相似的微晶尺寸。此外，在1200℃的MM烧结中观察到微晶的显着生长。MM烧结氧化铝显示出高于800MPa的平均弯曲强度，而传统烧结氧化铝仅显示出低于600MPa的平均弯曲强度。结论是MM烧结氧化铝的高抗弯强度并不是归因于晶粒和微晶尺寸的差异。
Characteristics of millimeter-wave (MM) sintering were investigated in high pure alumina from the standpoints of their structural and mechanical properties, comparing with the conventionally-sintered alumina. Nearly fully-densified pure alumina was obtained at 1250 C in the MM-sintering, indicating the decrease of about 250 C in the sintering temperature in comparison with the conventional sintering. From SEM observation and XRD measurement, it was found that similar grain sizes ranging from 2 µm to 3 µm and similar crystallite sizes were detected in both aluminas, which were sintered at 1250 C by MM-heating and at 1500 C by conventional heating. Further, remarkable growth of crystallites was observed in the MM sintering at 1200 C. MM-sintered aluminas showed the average bending strength higher than 800 MPa, whereas conventionally-sintered aluminas showed only the average bending strength less than 600 MPa. It is concluded that the high bending strength of MM-sintered alumina is not attributed to the differences of both grain and crystallite sizes.