Sol-gel deposited thermographic phosphors as possible thermal history coatings
Sol-gel deposited thermographic phosphors as possible thermal history coatings
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溶胶-凝胶沉积热成像荧光粉作为可能的热历史涂层
DOI：
10.1049/cp.2014.0537
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
B. Atakan
中科院分区：
文献类型：
--
作者：
D. Stenders;I. Karadagli;C. Pflitsch;B. Atakan
在许多工程应用中，必须准确测量表面温度。有时，表面在其寿命内达到的最高温度甚至比其实际温度更重要。为了获得关于这种最高温度的信息，可以应用所谓的温度历史传感器。在实际工作中遵循的获得这种信息的一个想法是存款具有磷光性质的掺杂氧化物，所述磷光性质取决于主体氧化物的晶体结构。因此，如果晶体结构在一定温度下发生变化，这种变化也可以通过随后的简单磷光寿命测量来检测。在本工作中，两种材料进行了研究。掺铽和铕的氧化钇和掺铕的氧化铝。这两种材料沉积为薄膜与溶胶-凝胶技术，使用新开发的自动喷涂装置。将样品加热两次：一次在给定温度下煅烧，然后第二次在不同温度下退火。在两种处理中的每一种之后，研究磷光寿命。第一个过程是磷光材料生产的固有过程。第二次退火模拟应用程序中的高温处理。发现当第二次退火温度高于第一次煅烧温度时，磷光寿命在大多数情况下发生变化。因此，检测到的最高温度的特定设计或对准是可能的。对于掺杂氧化钇，寿命增加约。20%，而对于掺杂的氧化铝，观察到寿命减少超过50%。总的来说，这可能是获得可调节温度历史传感器的有前途的方式。
In many engineering applications surface temperatures have to be measured accurately. Sometimes the maximum temperature reached by a surface within its lifetime is even more important than its actual temperature. In order to obtain information about such maximum temperatures, so called temperature history sensors can be applied. One idea to obtain such information, which is followed in the actual work, is to deposit doped oxides with phosphorescence properties which are depending on the crystal structure of the host oxide. Thus, if the crystal structure is changing at a certain temperature, this change could also be detected by a simple phosphorescence lifetime measurement afterwards. In the present work, two materials were investigated. Yttria doped with terbium and europium and alumina doped with europium. Both materials were deposited as thin films with the sol gel technique using a newly developed automated spray coating set-up. The samples were heated twice: once for calcination at a given temperature and then a second time by annealing them at different temperatures. After each of the two treatments the phosphorescence lifetimes were investigated. The first procedure is intrinsic for the production of phosphorescing material. The second annealing simulates the high temperature treatment within an application. It is found that the phosphorescence lifetime is changed in most cases, when the second annealing temperature is higher than the first calcination temperature. Thus, a certain design or alignment of the detected maximum temperature is possible. For the doped yttria, the lifetimes increase by ca. 20% after the second treatment at higher temperatures, while for doped alumina a reduction of the lifetimes by more than 50% is observed. In total this may be a promising way for obtaining adjustable temperature history sensors.
影响因子：
4.6
作者：
Rabhiou, A.;Feist, J.;Heyes, A.
通讯作者：
Heyes, A.
用于远程低温测温的磷光体激光诱导荧光
DOI：
--
发表时间：
1990
期刊：
Other Conferences
影响因子：
--
作者：
D. Beshears;G. Capps;M. Cates;C. M. Simmons;S. Schwenterly
通讯作者：
S. Schwenterly