CN106565260A - 一种大功率led用硬度高、可荧光的陶瓷基座及其制备方法 - Google Patents
一种大功率led用硬度高、可荧光的陶瓷基座及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,是由以下重量份的原料制成:刚玉2‑3,CeO2 1‑2,Al2O3 30‑40,纳米碳纤维1‑2,Y2O3 5‑7,柠檬酸3‑6,乙二胺3‑5,去离子水15‑20,二氧化钛1‑2,正硅酸乙酯2‑3,MgO1‑2,乙醇30‑40,硅微粉5‑10,硅烷偶联剂KH550 15‑20;本发明陶瓷底座具有优良的抗拉、抗压强度、耐磨性,并且导热系数大,具有可荧光的功能;配合添加的刚玉等,显著提高了材料的硬度。
Description
技术领域
本发明涉及一种LED用的陶瓷基座,具体涉及一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法。
背景技术
透明陶瓷作为近年来迅速发展起来的一种新型光电功能材料,在热学、力学性能、光性能、复合结构以及规模化生产方面优势明显,透明陶瓷目前主要作为窗口材料,激光材料和闪烁材料得到应用:透明化的发光材料可以解决荧光粉对光的散射和吸收,提高发光效率;陶瓷不存在单晶的分凝系数问题,可以实现多种发光离子的高浓度均匀共掺,从而可以通过精确控制陶瓷片荧光体的透射率、发光波段等各种参数,调节和控制荧光体陶瓷片转换的黄光与未被转换的蓝光之间的比例,利用透明陶瓷自身的均匀性,获得均一高质量的白光,并可进行发光设计,开发新材料;透明陶瓷具有优异的机械和热力学性能,抗振动,导热性好,可解决蓝光LED持续点亮下温度升高造成的各种发光问题,进一步提高器件的发光稳定性和使用寿命。
石云在《Ce:Y3Al5O12透明陶瓷在白光 LED中的应用研究》中,利用CeO2、Al2O3 、Y2O3制备了一种透明陶瓷,但是还存在着导热系数欠佳、不具有荧光功能等问题。
发明内容
基于以上思考,本发明旨在提供一种导热系数大,并且具有荧光功能的大功率LED用陶瓷基座及其制备方法。
本发明所要解决的技术问题采用以下的技术方案来实现 :
一种大功率LED用硬度高、可荧光的陶瓷基座,其特征在于,是由以下重量份的原料制成:
刚玉2-3,CeO2 1-2,Al2O3 30-40,纳米碳纤维1-2,Y2O3 5-7,柠檬酸3-6,乙二胺3-5,去离子水15-20,二氧化钛1-2,正硅酸乙酯2-3,MgO1-2,乙醇30-40,硅微粉5-10,硅烷偶联剂KH550 15-20;
所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,是由以下步骤制成:
a. 以柠檬酸为碳源,加入乙二胺、去离子水,在150-250℃条件下放置3-7天,得到在紫外光激发下,具有蓝光发射、绿光发射及红光发射的液体状碳点荧光材料;
b. 将硅微粉、纳米碳纤维加入到步骤b所得液体中,再加入硅烷偶联剂KH550,超声分散10-30min后,浸泡3-5h,过滤、水洗、烘干,得到吸附碳点荧光材料的混合物;
c. 将CeO2、Al2O3、Y2O3、刚玉、二氧化钛和步骤a所得混合物加入球磨机中,并加入正硅酸乙酯、MgO、乙醇,经球磨混料8-15h后,将浆料置于温度为 80-120℃的干燥箱中充分干燥;
d. 将步骤c所得物过筛和冷等静压制成素坯,然后转入真空炉中 1650℃-1850℃温度下保温20h后,可获得透明试样,为消除真空烧结过程中可能引入的内应力和氧空位,将试样在1380-1500℃空气氛围中退火 15-25 h。
所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,步骤d所述的真空炉的真空度为(5-15)10-4Par。
本发明的有益效果是:硅烷偶联剂KH550处理过的硅微粉吸附性、分散性较好,浸泡于碳点荧光材料中后,可以吸附碳点荧光材料,从而赋予封装材料可荧光的特点,同时,其均匀分散在陶瓷基底中,避免了碳点荧光材料和LED芯片的直接接触,有效解决了由于LED 芯片发热而导致荧光材料衰减速率过高、失效过快的问题,进而提高了 LED 灯的使用寿命和综合品质;同时,硅微粉可使陶瓷底座的抗拉、抗压强度增强,耐磨性能提高,并能增大其导热系数,增加阻燃性能;配合添加的刚玉等,显著提高了材料的硬度。
具体实施方式
下面结合实施例, 对本发明的具体实施方式作进一步描述。
实施例
一种大功率LED用硬度高、可荧光的陶瓷基座,其特征在于,是由以下重量份的原料制成:
刚玉3,CeO2 2,Al2O3 40,纳米碳纤维2,Y2O3 7,柠檬酸6,乙二胺5,去离子水20,二氧化钛2,正硅酸乙酯3,MgO 2,乙醇40,硅微粉10,硅烷偶联剂KH550 20;
所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,是由以下步骤制成:
a. 以柠檬酸为碳源,加入乙二胺、去离子水,在150-250℃条件下放置3-7天,得到在紫外光激发下,具有蓝光发射、绿光发射及红光发射的液体状碳点荧光材料;
b. 将硅微粉、纳米碳纤维加入到步骤b所得液体中,再加入硅烷偶联剂KH550,超声分散10-30min后,浸泡3-5h,过滤、水洗、烘干,得到吸附碳点荧光材料的混合物;
c. 将CeO2、Al2O3、Y2O3、刚玉、二氧化钛和步骤a所得混合物加入球磨机中,并加入正硅酸乙酯、MgO、乙醇,经球磨混料8-15h后,将浆料置于温度为 80-120℃的干燥箱中充分干燥;
d. 将步骤c所得物过筛和冷等静压制成素坯,然后转入真空炉中 1650℃-1850℃温度下保温20h后,可获得透明试样,为消除真空烧结过程中可能引入的内应力和氧空位,将试样在1380-1500℃空气氛围中退火 15-25 h。
所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,步骤d所述的真空炉的真空度为(5-15)10-4Par。
本发明的技术参数为:热导率≥15 W/mK;光效大于等于130 lm/W。
Claims (3)
1.一种大功率LED用硬度高、可荧光的陶瓷基座,其特征在于,是由以下重量份的原料制成:
刚玉2-3,CeO2 1-2,Al2O3 30-40,纳米碳纤维1-2,Y2O3 5-7,柠檬酸3-6,乙二胺3-5,去离子水15-20,二氧化钛1-2,正硅酸乙酯2-3,MgO1-2,乙醇30-40,硅微粉5-10,硅烷偶联剂KH550 15-20。
2.根据权利要求1所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,是由以下步骤制成:
a. 以柠檬酸为碳源,加入乙二胺、去离子水,在150-250℃条件下放置3-7天,得到在紫外光激发下,具有蓝光发射、绿光发射及红光发射的液体状碳点荧光材料;
b. 将硅微粉、纳米碳纤维加入到步骤b所得液体中,再加入硅烷偶联剂KH550,超声分散10-30min后,浸泡3-5h,过滤、水洗、烘干,得到吸附碳点荧光材料的混合物;
c. 将CeO2、Al2O3、Y2O3、刚玉、二氧化钛和步骤a所得混合物加入球磨机中,并加入正硅酸乙酯、MgO、乙醇,经球磨混料8-15h后,将浆料置于温度为 80-120℃的干燥箱中充分干燥;
d. 将步骤c所得物过筛和冷等静压制成素坯,然后转入真空炉中 1650℃-1850℃温度下保温20h后,可获得透明试样,为消除真空烧结过程中可能引入的内应力和氧空位,将试样在1380-1500℃空气氛围中退火 15-25 h。
3.根据权利要求2所述的一种大功率LED用硬度高、可荧光的陶瓷基座及其制备方法,其特征在于,步骤d所述的真空炉的真空度为(5-15)10-4Par。
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