CN112110724B - 具有可逆调控性能的共生层状钙钛矿材料及制备方法 - Google Patents
具有可逆调控性能的共生层状钙钛矿材料及制备方法 Download PDFInfo
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Abstract
一种具有可逆调控性能的共生层状钙钛矿材料及制备方法。材料的化学式为SrBi7.8‑ xErxYb0.2Ti7O27,其中,x=0,0.01,0.05,0.1或0.15。制备方法是以Bi2O3、SrCO3、Er2O3、Yb2O3和TiO2作为原料,按化学配比进行混合研磨,经高温固相反应法而合成。本发明优点:SrBi7.8‑ xErxYb0.2Ti7O27陶瓷材料在近紫外光(405nm)辐照下具有明显的变色效应,材料颜色从浅黄色变为灰黑色。同时,陶瓷材料具有近红外光(980nm)激发的上转换发光,且材料的上转换发光强度在近紫外光(405nm)和热退火激励下形成可逆调控,而且响应迅速,重复性好。SrBi7.8‑ xErxYb0.2Ti7O27材料未来可用于光开关、光学存储、安全防伪等领域。
Description
技术领域
本发明属于光调控材料技术领域,具体涉及一种具有可逆调控性能的共生层状钙钛矿材料及制备方法。
背景技术
材料物化性能的有效调控对开发高效电子元器件具有重要意义。光致变色是指材料受到特定光源激发后能够发生颜色变化的一种现象。以往对于光致变色材料的研究主要集中于有机物,对无机光致变色材料的研究相对较少,而无机光致变色材料的性能也不是太理想,限制了该类材料的实际应用,这就需要科研工作者开发新的无机光致光色材料。
上转换发光是在两个或者多个低能量光子激发下辐射一个高能量光子的过程。上转换发光材料在环境科学、电子工业、生物医学、农业生产等重要领域具有广泛应用。上转换发光性能的有效调控是当前科研工作者关注的重要方向之一。然而,以往上转换发光调控通常通过非可逆化学途径开展。为了适应新型光电器件的发展和需求,需科研工作者设计开发具有可逆调控发光性能的上转换材料。
若能发明一种稀土掺杂共生层状钙钛矿材料,同时实现光致变色和上转换发光性能的可逆调控,无疑具有重要意义。
发明内容
为了解决上述问题,本发明的目的在于提供一种具有可逆调控性能的共生层状钙钛矿材料及制备方法。
为了达到上述目的,本发明提供的具有可逆调控性能的共生层状钙钛矿材料是化学式为SrBi7.8-xErxYb0.2Ti7O27的陶瓷材料,其中,x=0,0.01,0.05,0.1或0.15。
本发明提供的具有可逆调控性能的共生层状钙钛矿材料的制备方法是:以SrCO3、Bi2O3、Er2O3、Yb2O3和TiO2作为原料,按比例混合后,利用乙醇作为溶剂在球磨机中进行研磨,之后将混合均匀的粉末进行干燥,于1100℃下预烧;然后将预烧的粉末重新研磨后利用压片机压成片状,在1200℃下烧结,冷却到室温后,经碳化硅表面抛光减薄,最终获得SrBi7.8-xErxYb0.2Ti7O27的陶瓷材料。
所述的SrCO3、Bi2O3、Er2O3、Yb2O3和TiO2的质量比如下:
当x=0时,为1/12.6777/0/0.2644/3.7868;
当x=0.01时,为1/12.6614/0.0127/0.2644/3.7868;
当x=0.05时,为1/12.5963/0.0641/0.2644/3.7868;
当x=0.1时,为1/12.5152/0.1283/0.2644/3.7868;
当x=0.15时,为1/12.4338/0.1927/0.2644/3.7868。
所述的球磨机采用行星式球磨机。
所述的球磨机中的研磨时间为24h。
所述的预烧时间为5小时。
所述的烧结时间为1.5小时。
本发明提供的具有可逆调控性能的共生层状钙钛矿材料及制备方法具有如下优点和特点:
1、以SrCO3、Bi2O3、Er2O3、Yb2O3、TiO2作为原料,并利用简单高温固相反应法而制备出SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
2、SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料被近紫外光(405nm)辐照1分钟后,样品颜色发生变化,展现明显的光致变色效应,从浅黄色变为灰黑色,250℃加热1分钟后材料颜色又从灰黑色变为浅黄色,具有较好的可逆性能。
3、SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料被近紫外光(405nm)辐照1分钟后,与光致变色相对应,材料漫反射谱强度明显降低。
4、在近红外光(980nm)激发下,SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料展现出明亮的绿光发射与相对较弱的红光发射。
5、SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料被近紫外光(405nm)辐照一定时间后,上转换发光强度相比于辐照前显著降低,辐照前后上转换绿光峰强度调控率(R,R=(I0-It)/I0,其中I0辐照前的上转换发光强度,It为辐照后的上转换发光强度)最高约为62.1%。
6、辐照后的SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料在热处理后,上转换发光恢复到辐照前的状态,在连续交替辐照与加热作用下,SrBi7.8- xErxYb0.2Ti7O27陶瓷材料上转换发光展现出较好的可逆调控,因此在光开光、信息存储与安全防伪领域具有应用前景。
附图说明
图1是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料的X射线衍射图谱。
图2是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料在近紫外光辐照前后和加热前后的表面照片。
图3是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料在近紫外光辐照前后的漫反射光谱。
图4是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料在980纳米近红外光激发下的室温上转换发射谱。
图5是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料在近紫外光(405nm)辐照前后的上转换发射光谱。
图6(a)—(d)是本发明实施例提供的SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料在近紫外光(405nm)辐照与热处理(250℃)交替作用下调控率R随测试循环次数N的变化关系。
具体实施方式
现结合具体实施例对本发明进行详细描述:
实施例1:
制备SrBi7.8-xErxYb0.2Ti7O27陶瓷材料,其中x=0,制备方法如下:
称取0.4474克SrCO3、5.6720克Bi2O3、0.1183克Yb2O3,1.6942克TiO2置于干净的玛瑙罐中,以无水乙醇(99.7%)作为介质,在行星式球磨机上球磨,时间为24小时。将球磨产物用烘箱烘干,获得烘干粉体。将烘干粉体用玛瑙研钵研磨,然后置于刚玉坩埚中,放入箱式炉中,连续升温至1100℃预烧5小时,降温至550℃后程序终止。将随炉冷却后所得产物用玛瑙研钵磨细,通过压片机压制成直径为13mm的圆片,然后用氧化铝粉覆盖,置于氧化铝板上在空气中1200℃烧结1.5小时,最终获得片状SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
实施例2:
制备SrBi7.8-xErxYb0.2Ti7O27陶瓷材料,其中x=0.01,制备方法如下:
称取0.4474克SrCO3、5.6647克Bi2O3、0.0057克Er2O3、0.1183克Yb2O3,1.6942克TiO2置于干净的玛瑙罐中,以无水乙醇(99.7%)作为介质,在行星式球磨机上球磨,时间为24小时。将球磨产物用烘箱烘干,获得烘干粉体。将烘干粉体用玛瑙研钵研磨,然后置于刚玉坩埚中,放入箱式炉中,连续升温至1100℃预烧5小时,降温至550℃后程序终止。将随炉冷却后所得产物用玛瑙研钵磨细,通过压片机压制成直径为13mm的圆片,然后用氧化铝粉覆盖,置于氧化铝板上在空气中1200℃锻烧90分钟,最终获得片状SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
实施例3:
制备SrBi7.8-xErxYb0.2Ti7O27陶瓷材料,其中x=0.05,制备方法如下:
称取0.4474克SrCO3、5.6356克Bi2O3、0.0287克Er2O3、0.1183克Yb2O3,1.6942克TiO2置于干净的玛瑙罐中,以无水乙醇(99.7%)作为介质,在行星式球磨机上球磨,时间为24小时。将球磨产物用烘箱烘干,获得烘干粉体。将烘干粉体用玛瑙研钵研磨,然后置于刚玉坩埚中,放入箱式炉中,连续升温至1100℃预烧5小时,降温至550℃后程序终止。将随炉冷却后所得产物用玛瑙研钵磨细,通过压片机压制成直径为13mm的圆片,然后用氧化铝粉覆盖,置于氧化铝板上在空气中1200℃锻烧90分钟,最终获得片状SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
实施例4:
制备SrBi7.8-xErxYb0.2Ti7O27陶瓷材料,其中x=0.1,制备方法如下:
称取0.4474克SrCO3、5.5993克Bi2O3、0.0574克Er2O3、0.1183克Yb2O3,1.6942克TiO2置于干净的玛瑙罐中,以无水乙醇(99.7%)作为介质,在行星式球磨机上球磨,时间为24小时。将球磨产物用烘箱烘干,获得烘干粉体。将烘干粉体用玛瑙研钵研磨,然后置于刚玉坩埚中,放入箱式炉中,连续升温至1100℃预烧5小时,降温至550℃后程序终止。将随炉冷却后所得产物用玛瑙研钵磨细,通过压片机压制成直径为13mm的圆片,然后用氧化铝粉覆盖,置于氧化铝板上在空气中1200℃锻烧90分钟,最终获得片状SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
实施例5:
制备SrBi7.8-xErxYb0.2Ti7O27陶瓷材料,其中x=0.15,制备方法如下:
称取0.4474克SrCO3、5.5629克Bi2O3、0.0862克Er2O3、0.1183克Yb2O3,1.6942克TiO2置于干净的玛瑙罐中,以无水乙醇(99.7%)作为介质,在行星式球磨机上球磨,时间为24小时。将球磨产物用烘箱烘干,获得烘干粉体。将烘干粉体用玛瑙研钵研磨,然后置于刚玉坩埚中,放入箱式炉中,连续升温至1100℃预烧5小时,降温至550℃后程序终止。将随炉冷却后所得产物用玛瑙研钵磨细,通过压片机压制成直径为13mm的圆片,然后用氧化铝粉覆盖,置于氧化铝板上在空气中1200℃锻烧90分钟,最终获得片状SrBi7.8-xErxYb0.2Ti7O27陶瓷材料。
为了验证本发明的效果,本发明人进行了如下实验:
1、将上述实施例制备的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料利用碳化硅研磨粉减薄至0.5毫米厚度。
2、用普通相机拍摄SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料的表面照片。
3、利用近紫外光(405nm,设定功率为80毫瓦)辐照SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料1分钟,然后用普通相机拍摄陶瓷材料的表面照片。
4、将步骤3中辐照后的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料在250℃热处理1分钟,然后用普通相机拍摄陶瓷材料的表面照片。
5、近紫外光辐照前后,利用反射谱测试仪表征SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料的漫反射谱光谱。
6、以近红外光(980nm)为激发波长,利用光谱仪测试上述SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料的室温上转换发射光谱。
7、将步骤3中辐照后的SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料按照步骤6中的测试条件,测试上转换发射光谱。
本发明实施例制备的SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料的晶体结构表征如图1所示,所有衍射峰都与标准数据很好地吻合。图2给出了SrBi7.8- xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料在近紫外光辐照前后和加热前后的表面照片,405nm辐照1分钟后样品颜色变为灰黑色,250℃加热1分钟后样品颜色褪色为浅黄色。图3给出了SrBi7.8-xErxYb0.2Ti7O27(x=0,0.01,0.05,0.1或0.15)陶瓷材料在近紫外光辐照前后的漫反射光谱。图4给出了SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1或0.15)陶瓷材料在980纳米近红外光激发下的室温上转换发射谱,样品展现出有明亮的绿光向外发射。图5给出了SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1,0.15)陶瓷材料在近紫外光(405nm)辐照前后的上转换发射光谱,调控率值最高为62.1%。图6给出了SrBi7.8-xErxYb0.2Ti7O27(x=0.01,0.05,0.1,0.15)陶瓷材料在近紫外光(405nm)辐照与热处理(250℃)交替作用下调控率R随测试循环次数N的变化关系,SrBi7.8-xErxYb0.2Ti7O27陶瓷材料的上转换调控展现出很好的重复性。
Claims (6)
1.一种具有可逆调控性能的共生层状钙钛矿材料,其特征在于:所述的共生层状钙钛矿材料是化学式为SrBi7.8-xErxYb0.2Ti7O27的陶瓷材料,其中,x=0,0.01,0.05,0.1或0.15;
其制备方法是:以SrCO3、Bi2O3、Er2O3、Yb2O3和TiO2作为原料,按比例混合后,利用乙醇作为溶剂在球磨机中进行研磨,之后将混合均匀的粉末进行干燥,于1100℃下预烧;然后将预烧的粉末重新研磨后利用压片机压成片状,在1200℃下烧结,冷却到室温后,经碳化硅表面抛光减薄,最终获得SrBi7.8-xErxYb0.2Ti7O27的陶瓷材料;
所述的SrCO3、Bi2O3、Er2O3、Yb2O3和TiO2的质量比如下:
当x=0时,为1/12.6777/0/0.2644/3.7868;
当x=0.01时,为1/ 12.6614/ 0.0127/0.2644/3.7868;
当x=0.05时,为1/ 12.5963/ 0.0641/ 0.2644/3.7868;
当x=0.1时,为1/ 12.5152/ 0.1283/ 0.2644/3.7868;
当x=0.15时,为1/12.4338/ 0.1927/ 0.2644/3.7868。
2.一种如权利要求1所述共生层状钙钛矿材料的制备方法,其特征在于:所述的制备方法是:以SrCO3、Bi2O3、Er2O3、Yb2O3和TiO2作为原料,按比例混合后,利用乙醇作为溶剂在球磨机中进行研磨,之后将混合均匀的粉末进行干燥,于1100℃下预烧;然后将预烧的粉末重新研磨后利用压片机压成片状,在1200℃下烧结,冷却到室温后,经碳化硅表面抛光减薄,最终获得SrBi7.8-xErxYb0.2Ti7O27的陶瓷材料。
3.根据权利要求2所述的制备方法,其特征在于:所述的球磨机采用行星式球磨机。
4.根据权利要求2所述的制备方法,其特征在于:所述的球磨机中的研磨时间为24h。
5.根据权利要求2所述的制备方法,其特征在于:所述的预烧时间为5小时。
6.根据权利要求2所述的制备方法,其特征在于:所述的烧结时间为1.5小时。
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