CN103525411A - 氧化铝/蒙脱土发光材料及其制备方法 - Google Patents

氧化铝/蒙脱土发光材料及其制备方法 Download PDF

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CN103525411A
CN103525411A CN201310498246.1A CN201310498246A CN103525411A CN 103525411 A CN103525411 A CN 103525411A CN 201310498246 A CN201310498246 A CN 201310498246A CN 103525411 A CN103525411 A CN 103525411A
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aluminum oxide
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李友芬
王�琦
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Beijing University of Chemical Technology
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Abstract

本发明公开了一种氧化铝/蒙脱土发光材料及其制备方法,其中发光材料为以下的物质:xAl2O3/(1-x)蒙脱土:yEu2+;发光材料的制备方法包括:以Al2O3、蒙脱土和Eu2O3为原料,按不同的质量比和摩尔比来称取各个原料,原料混合均匀后,在还原气氛下升温到1000℃~1550℃,保温烧结1h~5h,冷却到室温后研磨即制得本发明发光材料。样品为Al2O3/蒙脱土:Eu2+蓝色发光材料。加入蒙脱土后,所制备的样品具有Al2O3的晶体结构,有助于提高样品的发光性能。其制备工艺简单,成本低。

Description

氧化铝/蒙脱土发光材料及其制备方法
技术领域
本发明涉及一种发光材料及其制备方法,尤其涉及一种氧化铝/蒙脱土发光材料及其制备方法,采用无机物与蒙脱土复合的方式来提高材料的发光性能。
背景技术
稀土发光材料具有色纯度高、光吸收能力强、转换效率高、发射波长分布区域宽、荧光寿命长、性能稳定等优点,已经广泛应用于照明、显示、显像、光电子学器件等领域。
A12O3因具有透明性好、机械强度高,热传导性好、化学稳定性优良等优点,可用作发光的基质材料。Al2O3基发光材料的研究已经引起了国内外研究人员的关注,目前研究对象主要集中在发光薄膜方面,且制备方法以溶胶-凝胶法,共沉淀法为主,研究内容则侧重于稀土离子掺杂的发光机理,但由于普通Al2O3反应活性低,固相反应时必须借助于助熔剂,经高温焙烧后必须经过研磨,造成发光材料大小和形态不规则,引起发光性能降低和劣化。蒙脱土的主要成分是硅酸盐,矿物的颗粒细小,常在胶体尺寸范围内,呈晶体或非晶体,而且比表面积大,颗粒上带有负电性,具有与其他阳离子交换的能力,具有层间距的可调性和层间表面的可修饰性,其层间板对掺杂激活剂的发光材料的基质起到保护作用,不仅可以给基质提供相对稳定的环境,以展现其发光特性,而且可以改善其发光性能及光、热、化学稳定性,提高光转换效率,增强材料的发光强度,所以蒙脱土是很有特色的添加剂材料。目前,蒙脱土作为添加剂主要添加在有机基体中,而在无机基体中,通过添加蒙脱土来改善发光材料的性质的相关报道并不多见,因此本实验主要研究在Al2O3基体中添加蒙脱土,以Eu2+为激活剂,制备出Al2O3/蒙脱土:Eu2+发光材料,研究了蒙脱土对Al2O3基发光材料的作用。
发明内容
本发明要解决的技术问题在于针对现有的荧光材料以无机材料和蒙脱土混合为基质的几乎没有,证明了蒙脱土确实对Al2O3基发光材料有提高其发光性能的作用。提供一种制备工艺简单,成本低的氧化铝/蒙脱土发光材料。
本发明采用以下技术方案来解决上述技术问题:一种氧化铝/蒙脱土发光材料,其主要成分的化学通式为:x Al2O3/(1-x)蒙脱土: y Eu2+,其中x为质量百分数,y为摩尔百分数,其取值分别为0.1 ≤ x ≤ 0.9、0.005 ≤ y ≤0.3。
一种氧化铝/蒙脱土发光材料的制备方法,包括以下步骤:
(1)、以Al2O3、蒙脱土和Eu2O3为原料,各组分按质量比(x)Al2O3,(1-x)蒙脱土称重,其中x为0.1 ≤ x ≤ 0.9,激活剂Eu2O3为总摩尔数的0.5%~30%,并将该原料混合,研磨。
(2)、将前述步骤得到的物质在还原气氛下升温到1000~1550℃,在此条件下保温煅烧1~5小时,冷却到室温,研磨即可制得氧化铝/蒙脱土发光材料。
氧化铝/蒙脱土发光材料的制备方法中,所述步骤(2)中,将所述原料混合均匀后倒入刚玉坩埚中,然后将装有原料的刚玉坩埚放入高温梯度炉,在还原气氛下升温到1000~1550℃,在此条件下保温煅烧1~5小时,冷却到室温,研磨即可制得氧化铝/蒙脱土发光材料。
氧化铝/蒙脱土发光材料的制备方法中,所述步骤(2)中的还原气氛是指反应体系以碳粉为还原剂。
附图说明
下面将结合附图及实施例对本发明作进一步说明,附图中:
图1是实施例1制备的发光材料的激发光谱,
图2是实施例1制备的发光材料的发射光谱。
具体实施方式
实施例1,主要成分的结构式为0.1Al2O3 ∙ 0.9蒙脱土:0.15Eu2+的氧化铝/蒙脱土发光材料的制备:
分别称取氧化铝(Al2O3)0.5g、蒙脱土4.5g和氧化铕(Eu2O3)1.5348g,将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚,然后将放有原料的刚玉坩埚放入高温梯度炉中,在以碳粉为还原气氛下升温到1100℃,在此条件下保温煅烧5小时,冷却到室温,将冷却后的产物研磨,即可得到主要成分的结构式0.1Al2O3 ∙ 0.9蒙脱土:0.15Eu2+的氧化铝/蒙脱土为发光材料,本实施例的氧化铝/蒙脱土发光材料在波长为360nm 的激发光激发下发射480nm 宽带蓝光。
实施例2,主要成分的结构式为0.3Al2O3 ∙ 0.7蒙脱土:0.1Eu2+的氧化铝/蒙脱土发光材料的制备:
分别称取氧化铝(Al2O3)0.5g、蒙脱土1.1667g和氧化铕(Eu2O3)0.3292g,将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚,然后将放有原料的刚玉坩埚放入高温梯度炉中,在以碳粉为还原气氛下升温到1300℃,在此条件下保温煅烧4小时,冷却到室温,将冷却后的产物研磨,即可得到主要成分的结构式0.3Al2O3 ∙ 0.7蒙脱土:0.1Eu2+的氧化铝/蒙脱土为发光材料,本实施例的氧化铝/蒙脱土发光材料在波长为360nm 的激发光激发下发射480nm 宽带蓝光。
实施例3,主要成分的结构式为0.9Al2O3 ∙ 0.1蒙脱土:0.01Eu2+的氧化铝/蒙脱土发光材料的制备:
分别称取氧化铝(Al2O3) 5g、蒙脱土0.556g和氧化铕(Eu2O3)0.0978g,将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚,然后将放有原料的刚玉坩埚放入高温梯度炉中,在以碳粉为还原气氛下升温到1500℃,在此条件下保温煅烧3小时,冷却到室温,将冷却后的产物研磨,即可得到主要成分的结构式0.9Al2O3 ∙ 0.1蒙脱土:0.01Eu2+的氧化铝/蒙脱土为发光材料,本实施例的氧化铝/蒙脱土发光材料在波长为360nm 的激发光激发下发射480nm 宽带蓝光。

Claims (4)

1.一种氧化铝/蒙脱土发光材料,按其组成的结构式为: xAl2O3/(1-x)蒙脱土:yEu2+,其中x为质量百分数,y为摩尔百分数,其取值分别为0.1 ≤ x ≤ 0.9、0.005 ≤ y ≤0.3。
2.一种氧化铝/蒙脱土发光材料的制备方法,其特征在于,包括以下步骤:
(1)、以Al2O3、蒙脱土和Eu2O3为原料,各组分按质量比(x)Al2O3,(1-x)蒙脱土称重,其中x为0.1 ≤ x ≤ 0.9,激活剂Eu2O3为总摩尔数的0.5%~30%,并将该原料混合,研磨;
(2)、将前述步骤得到的物质在还原气氛下升温到1000℃~1550℃,在此条件下保温煅烧1~5小时,冷却到室温,研磨即可制得氧化铝/蒙脱土发光材料。
3.根据权利要求2所述的氧化铝/蒙脱土发光材料的制备方法,其特征在于,所述步骤(2)中,将所述原料混合均匀后倒入刚玉坩埚中,然后将装有原料的刚玉坩埚放入高温梯度炉,在还原气氛下升温到1000℃~1500℃,在此条件下保温煅烧1~5小时,冷却到室温,研磨即可制得氧化铝/蒙脱土发光材料。
4.根据权利要求3所述的氧化铝/蒙脱土发光材料的制备方法,其特征在于,所述的还原气氛是指反应体系以碳粉为还原剂。
CN201310498246.1A 2013-10-22 2013-10-22 氧化铝/蒙脱土发光材料及其制备方法 Pending CN103525411A (zh)

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Application publication date: 20140122