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文章摘要
六钛酸钠晶须的高温热稳定性研究
High-temperature thermal stability of Na2Ti6O13 whiskers
投稿时间:2019-12-26  
DOI:
中文关键词: 六钛酸钠晶须  热稳定性  近红外反射性能  TiO2  微观形貌
英文关键词: Na2Ti6O13 whiskers  thermal stability  near-infrared reflectivity  TiO2  microstructure
基金项目:国家自然科学基金资助项目(51474166,51672195);湖北省中央引导地方科技发展专项资金资助项目(2019ZYYD076).
作者单位E-mail
莫文琴 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 1529691767@qq.com 
王周福 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  
王玺堂 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  
刘浩 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  
马妍 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  
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中文摘要:
      以TiO(OH)2和Na2CO3为原料、NaCl为助熔剂,在900 ℃温度下制备了六钛酸钠晶须,并对其进行不同温度条件下的热处理,借助DSC、XRD、SEM及UV-VIS-NIR对六钛酸钠的热解过程、物相组成、显微形貌及近红外反射性能进行分析测试,研究了其高温热稳定性。结果表明,经900 ℃热处理后,六钛酸钠晶须发生部分分解,生成金红石型TiO2,随着热处理温度的升高,六钛酸钠晶须分解量不断增大且微观形貌随之改变;当热处理温度不高于1200 ℃时,样品近红外反射性能热稳定性高。
英文摘要:
      With TiO(OH)2 and Na2CO3 as raw materials and NaCl as fluxing agent, Na2Ti6O13 whiskers were prepared at 900 ℃ and heat-treated at different temperatures. DSC,XRD,SEM and UV-VIS-NIR were used to characterize the pyrolysis process,phase composition,microstructure and near-infrared reflectivity of Na2Ti6O13 whiskers, and the high-temperature thermal stability of Na2Ti6O13 whiskers was investigated . The results show that a small part of Na2Ti6O13 can be decomposed into rutile-type TiO2 after heat-treatment at 900 ℃. With the heat-treatment temperature increasing, the amount of Na2Ti6O13 whiskers decomposed increases and the morphology of Na2Ti6O13 whiskers is changed correspondingly. When the heat-treatment temperature is not higher than 1200 ℃, the near-infrared reflectivity of samples has good thermal stability.
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