低温固相反应合成纳米Ba1-_ySr_yTi_(1-x)Sn_xO_3  

Low temperature solid-state synthesis of nano-Ba_(1-y)Sr_yTi_(1-x)Sn_xO_3

作　　者：李潇[1] 孙会谦[1] 刘静培[1] 丁士文[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《电子元件与材料》2007年第2期55-57,共3页Electronic Components And Materials

基　　金：河北省自然科学基金重点资助项目(299078)

摘　　要：以TiCl4,SnCl4·5H2O,Sr(OH)2·8H2O和Ba(OH)2.8H2O为原料,采用低温固相反应合成了一系列纳米Ba1–yZnyTi1–xSnxO3(0≤x≤0.30,0≤y≤1.00)固溶体。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形貌观察,粒子为均匀球形,平均粒径50 nm。制陶实验发现,在BaTiO3纯相中掺入适量的Sn 4+和Sr2+,当(x=0.1,y=0.1)时,经1 150℃烧结的陶瓷片室温相对介电常数达到13 000,介质损失仅为0.008,烧结温度较之微米级粉体降低200～250℃。A series of nano-Ba1-ySryTi1-xSnxO3（0≤x≤0.30, 0≤y≤1.00） solid solutions were synthesized by low temperature solid-state reaction using TIC14, SnCl4 · 5H2O, Sr（OH）2 · 8H2O and Ba（OH）2 · 8H2O as raw materials. XRD phase analysis demonstrates that the compounds are mutually miscible in the solid solutions with cubic crystal structure. TEM shows the nanoparticls are spherical in shape with uniform distribution and an average particle size of 50 nm in diameter. The results of preparing ceramics show that by doping with Sn4＋ and Sr2＋ in pure BaTiO3 phase （x=0.1, y=0.1）, the dielectric constant increases to 13 000 while dielectric loss decreases to 0.008 at room temperature. The sintering temperature of the nano-powder is 1 150℃, which is 200-250℃ lower than that of the micro-powder.

关 键 词：无机非金属材料 低温固相反应 合成 钛酸钡纳米晶体 介电性能 

分 类 号：O611.4[理学—无机化学]