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中文摘要：
以三种钛渣为研究对象,采用X射线衍射和晶体结构分析,研究镁含量和冷却速度对钛渣中钛物相转变的影响。结果表明,急速冷却的钛渣中,生成的钛物相为黑钛石,化学式为MgnTi（3-n）O5（0〈n〈1）;缓慢冷却的钛渣中，当镁含量较高时，黑钛石转变为板钛镁矿，化学式为MgTi2O5；当镁含量较低时，板钛镁矿MgTi2O5和金红石型TiO2同时存在。板钛镁矿MgTi2O5的稳定性比黑钛石MgnTi3-nO5的稳定性好，缓慢冷却有助于镁掺杂进入黑钛石晶体，稳定其晶体结构。
英文摘要：
X-ray diffraction（XRD） and crystal structure analysis were used to study the effects of Mg content and cooling rate on the titanium phase transformation of three types of titanium slag. The results indicate that in the rapid cooling process, the titanium phase is anosovite, whose chemical formula is MgnTi（3-n）O5（0n1）. In the slow cooling process, when the Mg content is high, anosovite transforms into karrooite MgTi2O5 structure; when the Mg content is low, karrooite MgTi2O5 and rutile TiO2 both exist. The stability of karrooite MgTi2O5 is better than that of anosovite MgnTi（3-n）O5. Slow cooling contributes to the doping of Mg into the anosovite crystal and stabilises the anosovite crystal structure.
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