稀土氧化物对低温固相合成镁铝尖晶石纤维的影响  

Effects of rare earth oxides on low temperature solid phase synthesis of MgAl_(2)O_(4) fibers

作　　者：郭江鹏 邓长宇 王昕悦 陈昕煜 段红娟[1] 张海军[1] Guo Jiangpeng;Deng Changyu;Wang Xinyue;Chen Xinyu;Duan Hongjuan;Zhang Haijun(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《耐火材料》2024年第5期410-413,418,共5页Refractories

基　　金：国家自然科学基金面上项目(52072274,52272021);国家自然科学基金重点项目(52232002);湖北三峡实验室开放/创新基金(SK232006);湖北省自然科学基金项目(2022CFB629)。

摘　　要：为探究稀土氧化物和合成温度对合成镁铝尖晶石纤维的影响,以碱式硫酸镁晶须、铝溶胶为主要原料,分别以Y_(2)O_(3)、La_(2)O_(3)、Nd_(2)O_(3)为添加剂,经不同温度热处理后,制备了镁铝尖晶石纤维,研究了添加剂的种类(Y_(2)O_(3)、La_(2)O_(3)、Nd_(2)O_(3))、加入量(加入质量分数分别为0、1%、2%和3%)以及不同热处理温度(800、1000和1200℃保温3 h)对低温固相合成镁铝尖晶石纤维的影响。结果表明:1)以碱式硫酸镁晶须、铝溶胶为原料,添加质量分数为3%(w)的Nd_(2)O_(3)或Y_(2)O_(3)在800℃热处理时均对镁铝尖晶石纤维的合成具有较为明显的促进作用。2)热处理温度为1000℃时,添加3%(w)Nd_(2)O_(3)合成镁铝尖晶石纤维的效果最好。To investigate the effects of rare earth oxides and heat treatment temperatures on their synthesis,MgAl_(2)O_(4) fibers were prepared using basic magnesium sulfate whiskers and alumina sol as raw materials,and Y_(2)O_(3),La_(2)O_(3)and Nd_(2)O_(3)as additives,heat treating at different temperatures.The effects of additive types(Y_(2)O_(3),La_(2)O_(3)and Nd_(2)O_(3)),additive additions(0,1%,2%and 3%,by mass)and heat treatment temperatures(800,1000 and 1200℃for 3 h)on the low temperature solid phase synthesis of MgAl 2O 4 fibers were studied.The results show that:(1)with basic magnesium sulfate whiskers and alumina sol as raw materials and heat treatment temperature of 800℃,adding 3%Nd_(2)O_(3)or Y_(2)O_(3)can significantly promote the synthesis of MgAl_(2)O_(4) fibers;(2)when the heat treatment temperature is 1000℃,adding 3%Nd_(2)O_(3)has the best effect on the synthesis of MgAl_(2)O_(4) fibers.

关 键 词：镁铝尖晶石纤维 稀土氧化物 添加剂 低温合成 

分 类 号：TQ17[化学工程—硅酸盐工业]