CN115093245A - 一种包含稀土元素的发泡陶瓷板 - Google Patents

一种包含稀土元素的发泡陶瓷板 Download PDF

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CN115093245A
CN115093245A CN202210813120.8A CN202210813120A CN115093245A CN 115093245 A CN115093245 A CN 115093245A CN 202210813120 A CN202210813120 A CN 202210813120A CN 115093245 A CN115093245 A CN 115093245A
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钟蓉
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Jiangxi Modern Polytechnic College
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Abstract

本发明涉及包含稀土元素的发泡陶瓷板技术领域，尤其涉及下转换稀土材料回收的陶瓷泡沫板保温技术，包括如下步骤：步骤S1：回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，既从蓝光芯片上剥离荧光粉；步骤S2：充分混合回收的荧光粉、发泡剂、氧化铝、氧化钙加入纯水混合搅拌成为泥浆，模具中成型并脱模；步骤S3：干燥后混合物烧结形成发泡陶瓷。

Description

一种包含稀土元素的发泡陶瓷板
【技术领域】
本发明涉及包含稀土元素的发泡陶瓷板技术领域，尤其涉及下转换稀土材料回收的陶瓷泡沫板保温技术。
【背景技术】
发泡陶瓷、轻质多孔混凝土等这些无机基体材料具有优异的不燃性和耐热性。多孔陶瓷的缺点是其孔径和孔隙率不能适当控制。通过在室温或更高温度下将陶瓷粉与聚合物混合，聚合物在高温下被氧化并分解成气体，从而形成孔隙。然而，多孔陶瓷的缺点是孔的形成难以控制，其孔径和孔隙率不能得到适当的控制，强度较低。
另一方面，电子废弃物产生量逐年上升，年均增长近200万吨。自2014年以来，全球电子废弃物的总产生量逐年增长，至2019年增加了920万吨，每年增长近200万吨，2019年产生了约5360万吨电子废弃物。据报道，深圳海关所属观澜海关仅仅一次就查处LED废旧灯条2042.6公斤，如何再利用废旧的LED是一个全球性的难题。
本发明基于此而研发具有光稳定性、保温特性、优化的多孔结构、化学稳定性高、潜在毒性低的发泡陶瓷板。
【发明内容】
通过在室温下将陶瓷氧化物、稀土与烷氧基硅烷充分混合，使得烷氧基硅烷附着在陶瓷氧化物和稀土表面，使得烧结过程中均匀发泡，其形成封闭的多孔结构，良好的热绝缘体，并且由于稀土的存在，铝离子、钙离子存在，使得稀土材料禁带宽度增加，使得下转换波长红移至近红外区域，增强其保温性能。稀土发光材料是由稀土4f电子在不同能级间跃出而产生的，具有独特的光电特性，将废旧稀土加入陶瓷板中，可以增强其保温性能。
本发明涉及一种包含稀土元素的发泡陶瓷板技术领域，尤其涉及稀土回收下转换陶瓷泡沫板保温技术。
本发明解决技术问题的方案是提供一种包含稀土元素的发泡陶瓷板，包括如下步骤：
步骤S1：回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，既从蓝光芯片上剥离荧光粉；
步骤S2：充分混合回收的荧光粉、发泡剂、氧化铝、氧化钙加入纯水混合搅拌成为泥浆，模具中成型并脱模；
步骤S3：干燥后混合物烧结形成发泡陶瓷；
优选地，回收稀土的剥离方式包括但不限于打磨、角磨等，回收的荧光粉用纯水超声、冲洗，研磨后干燥，得到荧光粉末；
优选地，稀土粉末粒径为1-10μm；
优选地，所述发泡剂为烷氧基硅烷包括但不限于乙烯基三乙酰氧基硅烷、乙烯基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、叔丁基二甲基乙氧基硅烷、叔丁基二甲基乙氧基硅烷；
优选地，所述荧光粉的质量浓度为2wt％-5wt％，发泡剂烷氧基硅烷的质量浓度为5-9wt％，氧化铝的质量浓度为28-65wt％，氧化钙的质量浓度为8-35wt％；
优选地，所述氧化铝、氧化钙的粒径为2-30μm；
优选地，所述烧结是在950-1200℃的温度下烧制0.5-2小时。
相对于现有技术，本发明具有如下优点：
本发明涉及包含稀土元素的发泡陶瓷板技术领域，尤其涉及下转换稀土材料回收的陶瓷泡沫板保温技术。由于烷氧基硅烷的包裹，其形成封闭的多孔结构，良好的热绝缘体，并且由于稀土将短波长光转换为近红外光，增强了泡沫陶瓷板的保温性能。
【附图说明】
图1是本发明包含稀土元素的发泡陶瓷板的流程示意图。
图2为本发明中回收稀土材料的吸光度图谱。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施实例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用于解释本发明，并不用于限定本发明。
请参阅图1，本发明提供了一种包含稀土元素的发泡陶瓷板，包括如下步骤：
步骤S1：回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，既从蓝光芯片上剥离荧光粉；
步骤S2：充分混合回收的荧光粉、发泡剂、氧化铝、氧化钙加入纯水混合搅拌成为泥浆，模具中成型并脱模；
步骤S3：干燥后混合物烧结形成发泡陶瓷；
在本发明的步骤S1中，回收稀土的剥离方式包括但不限于打磨、角磨等，回收的荧光粉用纯水超声、冲洗，研磨后干燥，得到荧光粉末；
在本发明的步骤S1中，稀土粉末粒径为1-10μm；
在本发明的步骤S2中，所述发泡剂为烷氧基硅烷包括但不限于乙烯基三乙酰氧基硅烷、乙烯基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、叔丁基二甲基乙氧基硅烷、叔丁基二甲基乙氧基硅烷；
在本发明的步骤S2中，所述荧光粉的质量浓度为2wt％-5wt％，发泡剂烷氧基硅烷的质量浓度为5-9wt％，氧化铝的质量浓度为28-65wt％，氧化钙的质量浓度为8-35wt％；
在本发明的步骤S2中，所述氧化铝、氧化钙的粒径为2-30μm；
在本发明的步骤S3中，所述烧结是在950-1200℃的温度下烧制0.5-2小时。
在本发明实施例中，提供进一步具体实施例，结合表1，具体如下：
1、第一具体实施例：
回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，剥离其荧光粉并研磨；加入纯水充分混合5wt％3μm回收的荧光粉、5wt％发泡剂甲基三乙酰氧基硅烷、61wt％10μm氧化铝、29wt％10μm氧化钙并倒入模具中并脱模；干燥后的固体混合物烧结形成发泡陶瓷；在1050℃的温度下烧制1.5小时；
2、第二具体实施例：
回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，剥离其荧光粉并研磨；加入纯水充分混合3wt％3μm回收的荧光粉、2wt％发泡剂甲基三乙酰氧基硅烷、60wt％10μm氧化铝、32wt％10μm氧化钙并倒入模具中并脱模；干燥后的固体混合物烧结形成发泡陶瓷；在980℃的温度下烧制1.5小时；
3、第三具体实施例：
回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，剥离其荧光粉并研磨；加入纯水充分混合2wt％3μm回收的荧光粉、8wt％发泡剂甲基三乙酰氧基硅烷、58wt％10μm氧化铝、32wt％10μm氧化钙并倒入模具中并脱模；干燥后的固体混合物烧结形成发泡陶瓷；在1090℃的温度下烧制1.5小时；
4、第四具体实施例：
回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，剥离其荧光粉并研磨；加入纯水充分混合2wt％3μm回收的荧光粉、5wt％发泡剂乙烯基三乙酰氧基硅烷、58wt％10μm氧化铝、35wt％10μm氧化钙并倒入模具中并脱模；干燥后的固体混合物烧结形成发泡陶瓷；在1020℃的温度下烧制1.5小时；
5、第五具体实施例：
回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，剥离其荧光粉并研磨；加入纯水充分混合3wt％3μm回收的荧光粉、5wt％发泡剂乙烯基三乙酰氧基硅烷、60wt％10μm氧化铝、32wt％10μm氧化钙并倒入模具中并脱模；干燥后的固体混合物烧结形成发泡陶瓷；在1050℃的温度下烧制1.5小时；
表1第一具体实施例至第五具体实施例参数比对
Figure BDA0003740046230000051
表2第一具体实施例至第五具体实施例试样比对
Figure BDA0003740046230000061
图2为本发明中回收稀土材料的吸光度图谱。
相对于现有技术，本发明具有如下优点：
本发明涉及包含稀土元素的发泡陶瓷板技术领域，尤其涉及稀土回收下转换陶瓷泡沫板保温技术。其形成封闭的多孔结构，良好的热绝缘体，并且由于稀土和铝离子钙离子的存在，有着良好的保温性能。
以上所述仅为本发明的较佳实施例，并非因此限制本发明的专利范围，凡是在本发明的构思之内所作的任何修改，等同替换和改进等均应包含在本发明的专利保护范围内。

Claims (8)

1.本发明涉及包含稀土元素的发泡陶瓷板技术领域，尤其涉及下转换稀土材料回收的陶瓷泡沫板保温技术，其特征在于，包括如下步骤：
步骤S1：回收废旧白光LED芯片(黄色荧光粉(Y3Al5O12:Ce3+))上的稀土材料，既从蓝光芯片上剥离荧光粉；
步骤S2：充分混合回收的荧光粉、发泡剂、氧化铝、氧化钙加入纯水混合搅拌成为泥浆，在模具中成型并脱模；
步骤S3：干燥后混合物烧结形成发泡陶瓷；
2.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：回收稀土的剥离方式包括但不限于打磨、角磨等，回收的荧光粉用纯水超声、冲洗，研磨后干燥，得到荧光粉末；
3.如权利要求2所述的研磨稀土粉末，其特征在于：所述稀土粉末粒径为1-10μm。
4.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：所述发泡剂烷氧基硅烷包括但不限于乙烯基三乙酰氧基硅烷、乙烯基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、甲基三乙酰氧基硅烷、叔丁基二甲基乙氧基硅烷、叔丁基二甲基乙氧基硅烷；
5.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：所述荧光粉的质量浓度为2wt％-5wt％，发泡剂烷氧基硅烷的质量浓度为5-9wt％，氧化铝的质量浓度为28-65wt％，氧化钙的质量浓度为8-35wt％；
6.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：所述氧化铝、氧化钙的粒径为2-30μm，
7.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：所述纯水的质量为混合物质量的0.1-0.3。
8.如权利要求1所述的一种包含稀土元素的发泡陶瓷板，其特征在于：所述烧结是在950-1200℃的温度下烧制0.5-2小时。
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