%0 Journal Article
%T Electrical conductivity and infra red of CaTiO3 doped with CuO<br>
%A FFHammad
%A MShKhalil
%A A H Salama
%A <br>
%J 材料科学技术学报
%D 2001
%I 
%X The electrical conductivity of pure CaTiO3 and that containing 0.5～5.0 mole fraction CuO as dopant were measured in the temperature range 291～773 K. The conductivity values varied as a function of temperature and dopant concentration. The activation energy in the lower temperature range depended on the impurity content while in the high temperature range it indicated a value of energy gap width. The infrared absorption spectra in the range of 100～4000 cm-1revealed the presence of two main bands at 340 and 570 cm-1 which were assigned to TiO6 octahedral normal mode. Bands in the range of 106～270 cm-1 were due to the vibration of anion TiO-2. Some bands were observed at higher values due to the presence of lattice imperfections.There was a slight shift in band position with increasing dopant concentration which favors the formation of orthorhombic modification.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=FB998AB5D93458EB1383C97F2D42CFB5&yid=14E7EF987E4155E6&vid=BCA2697F357F2001&iid=B31275AF3241DB2D&sid=06DAE5E1DF7D0B6A&eid=B10D796AE1B3FEBD&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=0