International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
Synthesis and Characterization of Mechanoluminescent NaAlSiO4:Eu, Nd phosphor for impact sensor T. R. Sanodiya1, Piyush Jha2* 1Principal, Yashoda Bai Patel College, Kurai, Seoni, Madhya Pradesh, India Professor, Department of Applied Physics, Raipur Institute of Technology, Raipur, Chhattisgarh, India ---------------------------------------------------------------------***--------------------------------------------------------------------Ca2Al2SiO7:Ce, ZrO2:Ti and ZnMnTe, ZnS:Mn, Te [3]. So Abstract - Mechanoluminescent materials give a far, SrAl2O4:Eu, Dy phosphors is found very intense ML promising tool for detecting stress distribution in solids. material and fulfill all need of sensors but its chemical The NaAlSiO4:Eu,Nd phosphor was prepared by stability is poor. It is need of development to produce conventional solid state reaction method. XRD analysis stable ML material for sensors. NaAlSiO4:Eu,Ny shows that hexagonal nepheline structure with space phosphor is one of them. group P63. The ML intensity of NaAlSiO4:Eu,Nd phosphor Thus, developing of excellent ML materials in the initially increases with time, attains a peak value and present era for ML sensor application is still an decreases with time. The time corresponding to ML important task. The present paper reports in detail for intensity does not change significantly with increasing the first time, the characteristics of ML in impact velocity. The peak ML intensity increases linearly NaAlSiO4:Eu,Nd phosphor induced using a impulsive with square of impact velocity. The PL emission peak lies excitation technique. at 550 nm. This measurements made suitability of NaAlSiO4:Eu,Ny phosphor for developing stress and 2. EXPERIMENTAL damage sensors. The Na0.96AlSiO4:Eu0.02,Nd0.02 phosphor is prepared by conventional solid state reaction method (SSR). The Key Words: Mechanoluminescence, Triboluminescence, used precursor materials are Na2CO3 (99.9%), Al2O3 NaAlSiO4:Eu,Nd phosphor, Sensors, Photoluminescence (99.9%), SiO2 (99.9%), MgO (99.9%), Eu2O3 (99.9%) 1. INTRODUCTION and Nd2O3 (99.9%). These material were mixed with the addition of ethanol and ground for 2 h. Light emission caused by mechanical deformation such Stoichiometric mixtures of raw materials were sintered as compression, grinding, cutting, etc., in solid in an alumina crucible at 1200 ºC in carbon reducing materials is known as mechanoluminescence (ML) atmosphere for 10 h. After cooling it to room (sometimes called triboluminescence when friction temperature naturally, the as-obtained sample was occurs) [1,2]. ML has a long history [3] and has recently ground into powder with the help of agate mortar. been applied to real-time sensors of mechanical stress The prepared Na0.96AlSiO4:Eu0.02,Nd0.02 phosphor was [4] and structural damage [5] and a resource of X-ray characterized by powder XRD method. PANalytical 3 [6]. Several papers have described theoretically and kW X'pert Powder XRD - Multifunctional instrument is experimentally good aspects of ML [7-13]. Elastic and used for XRD pattern and the data was collected over plastic deformation gives elasticothe 2θ range 10–100° at room temperature. The mechanoluminescence (EML) and plasticophotoluminescence (PL) spectrum was recorded using mechanoluminescence (PML). Luminescence due to Carry eclipse fluorescence spectrophotometer, in fracture is called fracto-mechanoluminescence (FML) which the wavelength of the light used for excitation [1,2]. For the development of damage sensors and was 365 nm. In the present investigation the ML in pressure sensors, it is very essential to study FML. Na0.96AlSiO4:Eu0.02,Nd0.02 phosphor was excited using Many ML materials have been developed such as impulsive technique reported previously [14]. ZnS:Mn, SrAl2O4:Eu, SrAl2O4:Eu, Dy, SrAl2O4:Ce, SrAl2O4:Ce,Ho SrMgAl6O11:Eu, SrBaMgSi2O7:Eu, 3. RESULTS SrCaMgSi2O7:Eu, Sr2MgSi2O7:Eu, Ca2MgSi2O7:Eu,Dy, For crystal structure determination, powder XRD CaYAl3O7:Eu, (Ba,Ca)TiO3:Pr3+, MgGa2O4:Mn, analysis has been carried out. The typical XRD pattern ZnGa2O4:Mn, BaAl2Si2O8:rare earth element, 2Assistant
© 2017, IRJET
|
Impact Factor value: 5.181
|
ISO 9001:2008 Certified Journal
|
Page 2830