摘要
铝酸锶是典型的长余辉发光材料,已经广泛应用于日常生活中,但是铝酸锶在水中极易发生水解,抗湿性差,严重限制了其应用。采用化学气相沉积法和物理蒸汽沉积法在长余辉发光材料表面包覆膜,对设备要求高,价格贵,不易推广。因此,采用液相沉积法在长余辉荧光粉铝酸锶表面包覆SiO2膜和A l2O3膜来提高其耐水性能,采用电镜扫描(SEM)、X射线衍射(XRD)表征膜的存在,并对包膜试样进行了耐水性和发光性能的测试。结果表明:铝酸锶荧光粉包覆了致密的复合膜层后,耐水性得到显著的提高,同时,包膜对荧光粉的发光性能影响较小,发射光和激发光强度损失均在10%以下。
Strontium aluminate as long persistent luminescence materials have been widely applied in our daily life.However,it has poor resistance to humidity and is liable to hydrolysis,which limits its application.Therefore,liquid deposition technique,with advantages over chemical vapor deposition and physical vapor deposition techniques in terms of facility and cost,was adopted to encapsulate strontium aluminate phosphor powder with SiO2-Al2O3 composite film so as to improve the resistance to water attack.The morphology and phase structure of the composite film were analyzed by means of scanning electron microscopy and X-ray diffraction.The water-resistant performance and luminescent performance of the composite were evaluated.Results indicate that after being encapsulated with compact SiO2-Al2 O3 composite film,the water-resistant performance of the strontium aluminate phosphor powder is significantly increased,while its intensity loss of both emitted and excited lights is below 10%.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第10期55-57,共3页
Materials Protection
基金
河北农业大学非生命学科(FS200909)
新兴发展学科基金(FSY200736)项目
关键词
SiO2和Al2O3
复合膜
长余辉荧光粉
铝酸锶
液相沉积
SiO2-Al2O3
composite film
long persistent luminescence phosphor
strontium aluminate
liquid deposition
