本文以TiCl4为原料,将其水解生成的H2TiO3与化学计量比的Ba(OH)2·8H2O及Ca,Sr,Y,Mn的醋酸盐在室温下混合研磨后,于100℃烘干,再经800℃热处理,得到了一系列掺杂Ba0.85-xYx Sr0.07Ca0.08 MnyTi1-yO3纳米固溶体粉末.经XRD物相分析证明,产品为立方晶系的完全互溶取代固溶体.TEM电镜形貌分析,粒子分布较均匀,基本呈规则球形,粒径大约50 nm.通过制陶实验,研究了材料的PTC效应,当施主Y和受主Mn的掺杂量分别为1mol%和0.04mol%时,得到了室温电阻13Ω左右,升阻比达到106,电阻温度系数α为21.9%/℃的性质优良的PTC陶瓷材料.
参考文献
| [1] | ZHOU Dong-Xiang;GONG Shu-Ping.PTC Materials and Application[M].武汉:华中科技大学出版社,1989 |
| [2] | Chatterjee S;Sengupta K;Maiti H S .A miniature PTC thermistor based sensor elementfabricated by tape casting technique[J].Sensors and Actuators B:Chemical,1999,60(02):155-160. |
| [3] | Kleint C A;Stoepel U;Rost A .X-ray diffraction and conductivity investigations of lanthanum-doped barium titanate ceramics[J].Physica Status Solidi A Applied Research,1989,115:165-172. |
| [4] | Voltzke D.;Abieht H.-P. .Ca-containing additives in PTC-BaTiO_3 ceramics: effects on the microstructural evolution[J].Journal of the European Ceramic Society,2000(1):1663-1669. |
| [5] | Chen L F;Tseng T Y .Grain-boundary surface states of (Ba,Pb)TiO3 positive temperature coefficient ceramics doped with different additives and its influence on electrical properties[J].IEEE T Compon Pack Manu A,1996,19:423-430. |
| [6] | Zajc I;Drofenik M .Semiconducting BaTiO3 ceramic prepared by low temperature liquid phase sintering[J].Materials Research,1998,13:660-664. |
| [7] | Gillot C;Michenaud J P;Baukens I et al.Microscopic original of the PTC effect in niobium-doped barium titanate[J].Journal of the American Ceramic Society,1997,80:1043-1046. |
| [8] | Heywang W .Barium titanate as semiconductor with blocking layers[J].Solid-State Electronics,1961,3:51-58. |
| [9] | 苏毅,杨亚玲,李国斌.钛酸钡陶瓷粉体的合成技术[J].化工进展,2001(02):48-51. |
| [10] | 丁士文,王静,秦江雷,李希茂.纳米钛酸钡基介电材料的水热合成、结构与性能[J].中国科学B辑,2001(06):525-529. |
| [11] | 沈志刚,陈建峰,刘方涛,初广文,Yun Jimmy.纳米钛酸钡电子陶瓷粉体的制备技术[J].化工进展,2002(01):34-36,65. |
| [12] | 栾伟玲,高濂,郭景坤.溶胶-凝胶法制备纳米BaTiO3粉体的影响因素[J].无机材料学报,1999(06):861-865. |
| [13] | 苏毅,杨亚玲,胡亮.溶胶-凝胶法制备钛酸钡超细粉体的研究[J].化学研究与应用,2002(02):201-204. |
| [14] | LI Dao-Hua;YE Xiang-Rong;XIN Xin-Quan .Sythesis of nanomaterials by (humid) solid state reaction at room temperature[J].Chemical Research and Application,1999,11(04):415-418. |
| [15] | Liu ML;Zhou HL;Chen YR;Jia YQ .Room temperature solid-solid reaction preparation of iron-boron alloy nanoparticles and Mossbauer spectra[J].Materials Chemistry and Physics,2005(2/3):289-294. |
| [16] | 曹明贺,周东祥,龚树萍.Ca对BaTiO3 PTCR热敏电阻性能的影响[J].电子元件与材料,2000(04):18-19. |
| [17] | ZHANG Zhong-Tai;MI Qing;SUN Hong-fei .The characteristics of yttrium semiconducted BaSrTiO3 based PTCR ceramic swith the second Nb,Mn Codoped[J].Functional Materials,1998,29(04):366-369. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%