Formation characteristics of calcium stannate from SnO2 and CaCO3 synthesized in CO-CO2 and air atmospheres
Formation characteristics of calcium stannate from SnO2 and CaCO3 synthesized in CO-CO2 and air atmospheres
复制标题
CO-CO2 和空气气氛中合成的 SnO2 和 CaCO3 锡酸钙的形成特性
DOI：
10.1016/j.jpcs.2018.05.040
复制
发表时间：
2018-10
影响因子：
4
通讯作者：
Jiang Tao
中科院分区：
文献类型：
--
作者：
Zhang Yuanbo;Han Benlai;Su Zijian;Liu Bingbing;Jiang Tao
锡酸钙（Ca2SnO4）是一种常见的介电陶瓷，一般在焙烧温度超过1300 °C的空气气氛中采用高温固相法制备。在本研究中，ca2sno4更容易在co - co2气氛中合成，相对较低的温度小于1000 °C，反应时间为30 min。采用x射线衍射、扫描电镜、电感耦合等离子体原子发射光谱和矢量网络分析等方法，对比研究了二氧化锡（SnO2）和碳酸钙（CaCO3）在空气和co - co2气氛下的固态法制备ca2sno4的形成行为和微波介电性能。锡酸钙的生成行为表明，sno2和caco3在co - co2和空气环境中的反应均受三维扩散控制。在co - co2气氛下，反应速率常数k较高，表观活化能E较低。此外，在co - co2气氛下，采用低温固相法合成了ca2sno4。结果表明，ca2sno4陶瓷具有较高的介电常数和较低的介电正切损耗。然而，合成温度和时间分别降低了300 °C和8 h以上。
Calcium stannate (Ca2SnO4) is a common dielectric ceramic that is generally prepared by a high-temperature solid-state method in an air atmosphere with a roasting temperature of more than 1300 °C. In this study, Ca2SnO4was much more easily synthesized in a CO-CO2atmosphere at a relatively low temperature of less than 1000 °C for 30 min. We comparatively investigated the formation behavior and microwave dielectric properties of Ca2SnO4synthesized from tin dioxide (SnO2) and calcium carbonate (CaCO3) by a solid-state method in air and CO-CO2atmospheres using X-ray diffraction, scanning electron microscopy, inductively coupled plasma atomic emission spectroscopy, and vector network analysis. The formation behavior of calcium stannate indicated that the reactions between SnO2and CaCO3in CO-CO2and air atmospheres were both controlled by three-dimensional diffusion. In a CO-CO2atmosphere, the reaction had a higher reaction rate constant (k) and lower apparent activation energy (E). In addition, Ca2SnO4was synthesized by a low-temperature solid-state method in a CO-CO2atmosphere. The results indicated that Ca2SnO4ceramics had a higher dielectric constant and lower dielectric tangent loss than those synthesized by the high-temperature solid-state method in air. However, the synthesis temperature and time were reduced by more than 300 °C and 8 h, respectively.
登录
查看更多内容
CO-CO2气氛下CaCO3对氧化锡气态还原的影响
DOI：
10.1080/08827508.2016.1168414
发表时间：
2016-03
影响因子：
5
作者：
Su Zijian;Zhang Yuanbo;Liu Bingbing;Chen Jun;Li Guanghui;Jiang Tao
通讯作者：
Jiang Tao
影响因子：
2.2
作者：
Reena Kumari;R. Gangwar
通讯作者：
Reena Kumari;R. Gangwar
影响因子：
4
作者：
K. James;P. Krishnaprasad;K. Hasna;M. Jayaraj
通讯作者：
K. James;P. Krishnaprasad;K. Hasna;M. Jayaraj
影响因子：
4
作者：
Kanta Maan Sangwan;N. Ahlawat;R. Kundu;S. Rani;S.Usha Rani;N. Ahlawat;S. Murugavel
通讯作者：
Kanta Maan Sangwan;N. Ahlawat;R. Kundu;S. Rani;S.Usha Rani;N. Ahlawat;S. Murugavel
影响因子：
3.8
作者：
Moshtaghi, Saeed;Gholamrezaei, Sousan;Niasari, Masoud Salavati
通讯作者：
Niasari, Masoud Salavati