An innovative CaSiO 3 dielectric material from eggshells by sol-gel process Nuchnapa TangboriboonTunchanoke Khongnakhon • Supawinee KittikulRuksapong Kunanuruksapong •
An innovative CaSiO 3 dielectric material from eggshells by sol-gel process Nuchnapa TangboriboonTunchanoke Khongnakhon • Supawinee KittikulRuksapong Kunanuruksapong •
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采用溶胶凝胶工艺从蛋壳中提取的创新 CaSiO 3 介电材料 Nuchnapa TangboriboonTunchanoke Khongnakhon • Supawinee KittikulRuksapong Kunanuruksapong •
DOI：
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发表时间：
2011
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通讯作者：
A. Sirivat
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作者：
A. Sirivat
采用溶胶-凝胶法合成硅酸钙（CaSiO3），硅灰石，CaO：SiO2摩尔比为1：1，并在1100℃下烧结1小时。以鸡蛋壳为原料合成硅酸钙，与通过溶胶-凝胶法从金属醇盐前驱体获得的硅酸钙相比，具有成本低、纯度高、湿度敏感性低等优点。 CaSiO3 样品具有三斜晶相或斜晶相结构以及良好的电性能。在 25℃ 和 1 MHz 条件下，介电常数和电导率分别为 62.59 ± 0.44 和 8.0052 9 10 -4 (X.m) -1。样品的透射电子显微镜（TEM）图像显示出良好的分散性和均匀的颗粒，平均直径约为0.5 nm。 X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和同步热分析（STA）用于验证合成。
Calcium silicate (CaSiO3), wollastonite, with a molar ratio of CaO:SiO2 of 1:1, was synthesized by a sol-gel process and sintered at 1,100C for 1 h. The synthesis of calcium silicate was carried out using chicken eggshells as the starting material possessing several advantages such as low cost, high purity, and less moisture sensitivity, when compared with those obtained from metal alkoxide precur- sors via the sol-gel process. The CaSiO3 samples have the triclinic or anorthic phase formations and good electrical properties. The dielectric constant and electrical conductiv- ity are 62.59 ± 0.44 and 8.0052 9 10 -4 (X.m) -1 , respec- tively, at 25C and 1 MHz. The transmission electron microscopy (TEM) images of the samples show a good dispersion and uniform particles with an average diameter of about 0.5 nm. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron micros- copy (SEM), and Simultaneous thermal analysis (STA) were used to verify the synthesis.