%0 Journal Article
%T EFFECT OF Al_2O_3 ON THE FORMATION OF Ba_2Ti_9O_(20)<br>掺杂 Al_2O_3对 Ba_2Ti_9O_(20)相形成的影响
%A YU JiaqingWANG Jiasheng
%A ZHAO Hangwei
%A YU Baohai
%A WANG Shengyu
%A <br>喻家庆
%A 王家生
%A 赵航炜
%A 于宝海
%A 王盛宇
%J 材料研究学报
%D 1992
%I 
%X An investigation was made of the effect of Al_2O_3 compound on the formation ofBa_2Ti_9O_(20)phase in the solid state reactions.The formation of Ba_2Ti_9O_(20)crystal,which is diffi-cult in the BaO-TiO_2 binary system because of stress arising along the crystal-sturcture layerscaused by the structural factor,can be eased by the addition of a little Al_2O_3 into the binary re-action system.When Al_2O_3 participates in the reaction,BaAl_2Ti_6O_(16)crystal is formed and ex-ists in the way of inter-growth with the crystallizing Ba_2Ti_9O_(20)crystal.The intergrowthremarkebly decreases the stress arising along the crystal-structured layers of the crystallizingBa_2Ti_9O_(20)and reduces the height of potential energy barrier of its crystallization,resulting in itseasy formation in the reactions.
%K dielectric ceramic
%K Ba_2Ti_9O_(20)
%K formation mechanism<br>功能陶瓷
%K Ba_2Ti_9O_(20)
%K 形成机制
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=8023C1155FE58448&yid=F53A2717BDB04D52&vid=B31275AF3241DB2D&iid=B31275AF3241DB2D&sid=652E7E360EBE3082&eid=640CCB6E396307A8&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=1