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首页> 外文期刊>Materials Letters >Infrared transmission of hot-pressed Y- and Dy-alpha-sialon ceramics
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Infrared transmission of hot-pressed Y- and Dy-alpha-sialon ceramics

机译：Y-和Dy-α-赛隆热压陶瓷的红外透射

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By hot pressing at 1800 deg C for 2 h and heat treatment at 1700 deg C for 20 h, infrared transmittance of Y- and Dy-alpha-sialon, (Y1017 and Dy1017, corresponding to m= 1, n= 1.7; Y2010 and Dy2010, corresponding to m=2.0, n= 1.0), according to formula M_(m/3)Si_(12-(m+n))Al_(m+n)O_nN_(16-n) in 1500-4000 cm~(-1) (6.6-2.5 mu m) were studied. The results showed that the infrared transmittance of around 45 percent and 50 percent could be obtained for hot-pressed Y2010/Dy2010 and Y1017/Dy1017 samples respectively in 0.5 mm thickness in the range of 2000-3300 cm~(-1). The higher optical transmittance values of Y1017/Dy1017 than that of Y2010/Dy2010 were mainly resulted from the fact that the phase assemblage of Y1017/Dy1017 consisted of only crystallized alpha-sialon phase and small amount of melilite phase was formed for Y2010/Dy2010. The heat treatment encouraged the grain growth of alpha-sialon. Optical transmittances of Y1017/Dy1017 slightly decreased after heat treatment however, especially for Dy1017, which is mainly due to the formation of a small amount of garnet phase. Whereas, the optical transmittance of Y2010/Dy2010 increased from 45 percent to 55 percent as a result of alpha-sialon growing up and intergranular glassy phase moving. The results indicated that a suitable composition to avoid the formation of the second crystalline phase after heat treatment is important to make alpha-sialon materials with good optical properties.
机译：通过在1800摄氏度下热压2小时并在1700摄氏度下热处理20小时，Y-和Dy-α-赛隆（Y1017和Dy1017的红外透射率，对应于m = 1，n = 1.7； Y2010和Dy2010，对应m = 2.0，n = 1.0），根据公式M_（m / 3）Si_（12-（m + n））Al_（m + n）O_nN_（16-n）在1500-4000 cm〜研究了（-1）（6.6-2.5微米）。结果表明，热压的Y2010 / Dy2010和Y1017 / Dy1017样品在0.5 mm厚度的2000-3300 cm〜（-1）范围内分别可获得约45％和50％的红外透射率。 Y1017 / Dy1017的光学透射率值比Y2010 / Dy2010的光学透射率值高是由于Y1017 / Dy1017的相组装仅由结晶的α-赛隆相组成，并且在Y2010 / Dy2010形成了少量的陨石相。热处理促进了α-赛隆的晶粒生长。然而，Y1017 / Dy1017的光透射率在热处理后略有下降，特别是对于Dy1017，这主要是由于少量石榴石相的形成。而由于alpha-sialon的生长和晶间玻璃态相的移动，Y2010 / Dy2010的透光率从45％增至55％。结果表明，避免热处理后形成第二结晶相的合适组成对于制造具有良好光学性质的α-赛隆材料很重要。

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