<A href="http://gouwuche.com/science?_ob=ArticleURL&_udi=B6TWC-48CXHY0-37&_user=9422552&_coverDate=09%2F30%2F1994&_alid=1441336399&_rdoc=1&_fmt=high&_orig=search&_cdi=5559&_sort=r&_docanchor=&view=c&_ct=1&_acct=C000052141&_version=1&_urlVersion=0&_userid=9422552&md5=9823d02fa76566a1849b88fc321d5f24" ?>Thermodynamic evaluation and phase diagram of PbO---TiO2 system