CN113461417A - 一种用飞秒激光织构化技术加工的荧光陶瓷 - Google Patents
一种用飞秒激光织构化技术加工的荧光陶瓷 Download PDFInfo
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Abstract
本发明公开了一种用飞秒激光织构化技术加工的荧光陶瓷，采用以下方法制备得到：先按照通式(Ce0.001PrxY0.009‑x)3Al5O12，0.001＜x≤0.005中各元素的化学计量比称取初始原料，将初始原料、分散剂聚醚酰亚胺与无水乙醇进行球磨混合，球磨后的混合浆料经干燥、过筛后进行煅烧，将煅烧后的混合粉体进行干压，压制后的物料放在真空条件下进行烧结，待冷却取出后打磨、抛光，得到荧光陶瓷，用辅助材料和激光在制好的荧光陶瓷表面和内部进行织构，即可。本发明提供了一种用飞秒激光织构化技术加工的荧光陶瓷，相比原来的荧光陶瓷，光均匀性更好，其具有更加优良的光学性质。
Description
技术领域
本发明属于荧光陶瓷制备领域，具体涉及一种用飞秒激光织构化技术加工的荧光陶瓷。
背景技术
荧光陶瓷是一种基于先进透明陶瓷烧结技术的新型荧光转换材料。通过陶瓷基质筛选、不同稀土掺杂、晶体场环境调控、能量传递过程控制和精细化结构设计，使其具备色温可调、抗热冲击、发光稳定、发光效率高及寿命长等优势。
飞秒激光是一种以脉冲形式发射的激光，持续时间只有几个飞秒（1飞秒=千万亿分之一秒），是人类在实验条件下所能获得的最短脉冲。飞秒激光具有以下几个特点：首先是飞秒激光持续的时间及其短，只有几个飞秒，它比利用电子学方法所获得的最短脉冲还要短几千倍，是人类目前在实验条件下所能获得的最短脉冲；其次是飞秒激光具有非常高的瞬时功率，可以达到百万亿瓦，比目前全世界发电总功率还要多出上百倍；再次是飞秒激光能聚焦到比头发的直径还要小的空间区域内，使电磁场的强度比原子核对其周围电子的作用力还要高出数倍。
基于飞秒激光的以上优势，为了让传统的Ce:YAG荧光陶瓷激发的黄光中有更多的红色成分，可加入适当的Pr元素。更主要的为了提高内部和表面的光均匀性，可采用飞秒激光的“光爆破技术”实现陶瓷内部和表面的织构化，设计织构形状，使其具有更良好的光学性质。
发明内容
针对现有技术中荧光陶瓷存在全反射效应致使的光提取率低，无法实现较高光质的问题，本发明提供了一种用飞秒激光织构化技术加工的荧光陶瓷。
为了实现上述发明目的，本发明采用以下技术方案：
一种用飞秒激光织构化技术加工的荧光陶瓷，采用以下方法制备得到：
Step1、按照通式 (Ce0.001PrxY0.009-x)3Al5O12，0.001＜x≤0.005中各元素的化学计量比分别称取氧化铈、氧化钇、氧化镨、氧化铝作为初始原料；
Step2、将称量的初始原料、分散剂聚醚酰亚胺与无水乙醇置入球磨罐中，进行行星式球磨混合，球磨后的混合浆料进行干燥、过筛，然后将混合粉体置于马弗炉中煅烧；
Step3、将煅烧后的混合粉体进行干压，压制成片状；
Step4、将压制后的物料放在真空条件下进行烧结，待冷却取出后打磨、抛光；
Step5、用辅助材料和激光在制好的荧光陶瓷表面和内部进行织构。
进一步地，Step2中，球磨混合的条件为：转速160～200 rpm、时间15～28 h。
进一步地，Step2中，所述聚醚酰亚胺的加入量为初始原料总量的0.4～1.1％，无水乙醇的体积与初始原料总量的质量比为0.9～2.1：1ml/g。
进一步地，Step3中，干压的压力为100～150 Mpa。
进一步地，Step4中，烧结温度为1750～1800 ℃，冷却时间为6 h。
进一步地，Step5中，所述的飞秒激光产生光爆破原理实现表面和内部各种形状的织构化处理。
与现有技术相比，本发明具有如下有益效果：
1.本发明提供了一种用飞秒激光织构化技术加工的荧光陶瓷，相比原来的荧光陶瓷，光均匀性更好，其具有更加优良的光学性质。
2. 本工艺简单，非常具有实际推广价值，且织构化的形状可根据实际需要设计和加工。
附图说明
图1、图2、图3为飞秒激光织构化加工前后对比图。
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晰，结合具体实施例，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仅用以解释本发明，但不应以此限制本发明的保护范围。
实施例1
制备(Ce0.001Pr0.004Y0.995)3Al5O12，用中心波长1064 nm飞秒激光器加工荧光陶瓷。
(a)设定目标产物质量为60 g，按照(Ce0.001Pr0.004Y0.995)3Al5O12中的各元素化学计量比称取氧化钇32.62 g、氧化铝24.67 g、氧化镨1 g、氧化铈0.25 g。
(b)将原料粉体0.3 g聚醚酰亚胺、60 ml无水乙醇混合，加入直径为0.2 mm的氧化铝球300 g，在尼龙球磨罐中进行行星式球磨，球磨转速200 r/min，球磨时间14 h；将球磨后的混合浆料放入55 ℃鼓风干燥箱中干燥5 h，干燥后的混合粉体过150目筛，过筛4遍，之后置于马弗炉中煅烧，煅烧温度为800 ℃，保温时间3 h，以去除残留的有机物。
(c)将步骤(b)煅烧后的粉体放入陶瓷干压机，在150 Mpa的压力下压制。
(d)将压好的片状物在真空条件下烧结，温度为1750 ℃，并冷却六个小时，对其进行双面抛光。
(e)用中心波长为1064 nm的短脉冲掺镱光纤激光器中，进行荧光陶瓷“波浪形”的织构化。如图1所示。
实施例2
制备(Ce0.001Pr0.006Y0.993)3Al5O12，用中心波长1064 nm的飞秒激光器加工荧光陶瓷。
(a)设定目标产物质量为60 g，按照(Ce0.001Pr0.006Y0.993)3Al5O12中的各元素化学计量比称取氧化钇30.96 g、氧化铝23.46g、氧化镨1.32 g氧化铈0.33 g。
(b)将原料粉体0.5 g聚醚酰亚胺、100 ml无水乙醇混合，加入直径为5 mm的氧化铝球120 g，在尼龙球磨罐中进行行星式球磨，球磨转速160 r/min，球磨时间30h；将球磨后的混合浆料放入70℃鼓风干燥箱中干燥10 h，干燥后的混合粉体过300目筛，过筛4遍，之后置于马弗炉中煅烧，煅烧温度为900 ℃，保温时间6 h，以去除残留的有机物。
(c)将步骤(b)煅烧后的粉体放入陶瓷干压机，在100 Mpa的压力下压制。
(d)将压好的片状物在真空条件下烧结，温度为1800 ℃，并冷却六个小时，对其进行双面抛光。
(e) 用中心波长为1064 nm的短脉冲掺镱光纤激光器中，进行荧光陶瓷“菱形”的织构化。如图2所示。
实施例3
制备 (Ce0.001Pr0.009Y0.990)3Al5O12，用中心波长1064 nm的飞秒激光器加工荧光陶瓷。
(a)设定目标产物质量为60 g，按照(Ce0.001Pr0.009Y0.990)3Al5O12中的各元素化学计量比称取氧化钇33.01 g、氧化铝25.35 g、氧化镨4.12 g、氧化铈1.03 g。
(b)将原料粉体0.4 g聚醚酰亚胺、100 ml无水乙醇混合，加入直径为0.5 mm的氧化铝球180 g，在尼龙球磨罐中进行行星式球磨，球磨转速180 r/min，球磨时间20 h；将球磨后的混合浆料放入60 ℃鼓风干燥箱中干燥8 h，干燥后的混合粉体过100目筛，过筛4遍，之后置于马弗炉中煅烧，煅烧温度为850℃，保温时间5 h，以去除残留的有机物。
(c)将步骤(b)煅烧后的粉体放入陶瓷干压机，在180 Mpa的压力下压制
(d)将压好的片状物在真空条件下烧结，温度为1780 ℃，并冷却六个小时，对其进行双面抛光。
(e)用中心波长为1064 nm的短脉冲掺镱光纤激光器中，进行荧光陶瓷“网格状”的织构化。如图3所示。
Claims (5)
1.一种用飞秒激光织构化技术加工的荧光陶瓷，其特征在于：采用以下方法制备得到：
Step1、按照通式 (Ce0.001PrxY0.009-x)3Al5O12，0.001＜x≤0.005中各元素的化学计量比分别称取氧化铈、氧化钇、氧化镨、氧化铝作为初始原料；
Step2、将称量的初始原料、分散剂聚醚酰亚胺与无水乙醇置入球磨罐中，进行行星式球磨混合，球磨后的混合浆料进行干燥、过筛，然后将混合粉体置于马弗炉中煅烧；
Step3、将煅烧后的混合粉体进行干压，压制成片状；
Step4、将压制后的物料放在真空条件下进行烧结，待冷却取出后打磨、抛光，得到荧光陶瓷；
Step5、用表面粗糙度小于350 nm，厚度为1 nm的95氧化铝陶瓷和平均粒径为2.071 μm氧化铝粉末作为辅助材料和激光为中心波长为1064 nm的短脉冲掺镱光纤激光器对其表面和内部进行织构。
2.根据权利要求1所述的荧光陶瓷，其特征在于：Step2中，球磨混合的条件为：转速160～200 rpm、时间15～28 h。
3.根据权利要求1所述的荧光陶瓷，其特征在于：Step2中，所述聚醚酰亚胺的加入量为初始原料总量的0.4～1.1％，无水乙醇的体积与初始原料总量的质量比为0.9～2.1：1ml/g。
4.根据权利要求1所述的荧光陶瓷，其特征在于：Step3中，干压的压力为100～150Mpa。
5.根据权利要求1所述的荧光陶瓷，其特征在于：Step4中，烧结温度为1750～1800 ℃，冷却时间为6 h。
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