Dr. ANDE MURALI VARAPRASAD (SACET752)
|Department||Electronics and Communications Engineering|
|Date of Birth:||Thursday, May 15, 1952|
|Date of Joining the Institution ||Friday, July 18, 2014|
|| UG : -
PG : -
Ph.D : Ph.D [PIEZOELECTRICS]
|Experience in SACET||4 Year(s) 10 Month(s)|
|Total Experience in Years
|| Teaching : 12 Year(s) 0 Month(s)
Industry : 1 Year(s) 0 Month(s)
Research : 32 Year(s) 0 Month(s)
Awards : 1980 : Irish Post doctoral Fellow, Trinity college Dublin (Dec 1980 to June 1983)1986 : Japan Matsumae International Foundation Fellowship & Medal (Sept 1986 to March 1987)1990 : Materials Research Society of India Medal
DRDO Career from May 1984 to May 2012:
2004 - 2012 served as Scientist F at Research Centre Imarat, Hyderabad. RCI is the brain child of Dr APJ Abdul Kalam and primarily involved in the development of Aerospace systems. At Research Centre Imarat Dr Varaprasad is involved in the development of MEMS (Micro Electro Mechanical System) for aerospace applicstions as the Head, Micro Electro Mechanical Systems (MEMS) Lab. : It is responsible for fabrication of high technology communication systems for aerospace applications. During my services at RCI lead and / or Associated with numerous technology projects that included : MEMS devices for telemetry, tele-command applications, Fibre Optic Gyros for Navigation, MEMS based pressure sensors & vibration sensors.
Management related (3 years from 2005 to 2007):
Head, Human Resources Development (HRD)
Conducted 'Aerospace Technology Orientation courses' for newly recruited Scientists of Research Centre Imarat. Initiated & Established e-learning centre. Young scientists with exceptional emotional intellegence were selected & motivated to work on challenging tasks such as Interceptor Missile Technologies.
Subjects taught in the orientation courses include Telemetry, Tele-command applications, Fibre Optic Gyros for Navigation, MEMS based Pressure sensors & Vibration sensors, Actuator & control ystems, Proximity fuses, Minaturized Power supply systems for aerospace applications, active RADAR seeker for AAD missile, Imaging Infra Red / IIR seeker for NAG missile.
1984 - 1988 :
Worked on the following projects at Naval Materials Research Laboratory, Bombay.Development of Lead Zirconate Titanate materials for SONAR Transducer system. Strontium doped Lead Zirconate Titanate materials with piezoelectric stress coefficients exceeding 250 pC/N have been made in desired sizes and shapes for the first Indian SONAR. Development of PZT-Polymer composites for Hydrophone applications. (Related publication) A.M.Varaprasad and R. Krishnan, PZT-Polymer composites for hydrophone transducer applications, International Journal of Sensors and Actuators, Vol14, pp361-368 (1988). Piezoelectric composites with 3-3 connectivity have been made using BURPS process. Hydrophones were fabricated and are used to make towed arrays. Development of anti radar paints (Notable article : Indian Express, Invisible plane, 22 Sept, 1987) . Anti radar paints with ferrite additives were made and coatings applied on aircraft wings and edges to reduce the radar cross section.
1986-87 :Japan Matsumae International Foundation Fellowship Period : Associated with Professor Kenji Uchino at Physics Department, Sophia University, Tokyo on the Development of Accoustic Emission Sensors.
1988 - 2003 :
Worked on the following projects at Defence Materials & Stores Research & Development Establishment, Kanpur .Development of composite Piston Insulators for Mirage-2000 brake assemblies. Development of Y-ZrO2 Thermal Barrier Coatings for Mirage-2000 aircraft engines Development of CAF / Central Analytical Facilities: Sophisticated equipment include Scanning Electron Microscope, Atomic Absorption Spectrometer, X-Ray powder diffraction, Thermo Gravimetric Analyzer, Differential Thermal Analysis, NMR.
About 50 publications in National, International Journals and several presentations in conferences & workshops. Some of the journal where my research papers have been published include, Japanese journal of Applied Physics, Journal of Physics (UK), Journal of Chemical Physics(USA), International journal of Ferroelectrics (USA), Ferroelectrics letters (USA), International Journal of Sensors & Actuators (Netherlands), Bulletin of Materials science (India), IEEE Transactions on Ultrasonics Ferroelectrics & Frequency control, Journal of Physics C Solisstate Physics.
Indian Express article dt. Sep.22,1987 : Invisible plane ( A.M.Varaprasad, about stealth technology)A.M.Varaprasad and R. Krishnan, PZT-Polymer composites for hydrophone transducer applications, International Journal of Sensors and Actuators, Vol14, pp 361-368 (1988)A M Varaprasad and Kenji Uchino, Dielectric and Piezoelectric studies of La doped PZT-Polymer composites, Ferroelectrics Letters Vol.7, pp 89-95 (1987)A M Varaprasad and Kenji Uchino, Dielectric relaxation studies on PZT-PVDF Composites, Ferroelectrics Letters, Vol.7, pp 55-59 (1987)K.Uchino, T.Hirose and A.M.Varaprasad, Accoustic emission in Piezoelectric/Electrostrictive actuators, Japanese Journal of Applied Physics, Vol.26-2 pp 167-170 (1987)P.K.Mehta, B.D.Padalia, MVR Murthy, A.M.Varaprasad and K.Uchino, X-ray structural determinations on Sr and La doped PZT, Ferroelectrcs Letters, Vol.7 pp 121-129 (1987)A.M.Varaprasad and J.H. Jagannath, Effect of Polymer composition on the permittvity and conductivity behaviour of PZT composites, IEEE Trans. on Ultrasonics, Ferroelectrics,and Frequency control, Vol33 pp 804 (1986)A.M.Varaprasad and C.Radhakrishna Murthy, Magnetic hysteresis and crystallization studies on metallic glass alloy FeCoBSi, Bull. Mat. Sci. Vol.8 pp567-575 (1986)A.M.Varaprasad, Rotational mode and Curie temperature in Tungsten bronze Ferroelectrics, Japanese J. of Applied Phys., Vol.24-2, pp 361-363 (1985)J.K.Vij and A.M.Varaprasad, Dielectric anomalies in Barium Strontium Niobate, Ferroelectrics, Vol.38, pp 865-868 (1981)A.M.Varaprasad, A.L.Sashimohan, D.K. Chakrabarty and A.B.Biswas, Structural and dielectric studies of some Barium Titanate based dielectrics, Vol.3 pp1-8 (1981)A.M.Varaprasad, A.L.Sashimohan, A.B.Biswas and D.K.Chakrabarty, Structural and dielectric studies of some perovskite type titanates, Journal of Physics C Solidstate Physics, Vol.12 pp 465-472 (1979)A.M.Varaprasad, A.L.Sashimohan, A.B.Biswas and D.K.Chakrabarty, Structural and dielectric studies of some niobate-titanate systems, Bulletin of Materials science, Vol2 pp239-249 1980)A.M.Varaprasad, A.L.Sashimohan, A.B.Biswas and D.K.Chakrabarty, Dielectric and Infrared spectral studies of NaLaBaTiO3 systems, Physica status solidi (A) Applied Physics, Vol44 pp 787-791 (1977)A.M.Varaprasad, The far infrared analysis of k-casein a molecular diode, Journal of Chemical Physics, Vol.77 pp 2809-2811 (1982)A.M.Varaprasad, Is Kappa casein a molecular diode? Electronics and Power, Vol.27 pp 600 (1981)A.M.Varaprasad, MRSI Medal lecture on 'Recent trends in Piezoelectric ceramics and composites (1990) Materials Research Society of India AGM, Feb 1990, NCL, Pune.A.M.Varaprasad, Piezoelectric ceramic insulators - new applications, ERDA Proc.of seminar on Solid Insulating Materials, ERDA Seminar, Dec 1989.A.M.Varaprasad and R.K.Singh, Preparation and Infrared spectral studies of PVDF Films, Indo-US_Japan workshop on electronic ceramics and materials, NCL, Pune (1989)A.M.Varaprasad, On the structure morphology of Polysilicon, Proc. Ame. chem.Soc. Symp on Microelectronics Processing ,, Seattle, Washington, Mar 1983.A.M.Varaprasad and D. Simpson, On the utility of Scanning Electron Microscopy in Material Science, Proc. European Electron Microscopy Techniques, 1984, p-14A.M.Varaprasad and D.Simpson, (Industrial Consultancy Report) Diagnosis of device failure - QPL 82 transistors, Microelectronics and Electrical Engineering, Dept., Trinity college, Dublin, Ireland Sept.1982.A.M.Varaprasad, Dielectric composites for transducer and actuator devices, IETE Technical review, Vol.9 pp 314-315 (1992)A.M.Varaprasad and S. Parameswaran, The 123 oxide in double layer microwave absorber, Ferroelectrics Lett., Vol.9(5), pp123-130 (1988)A.M.Varaprasad, Rotational mode in 123 oxide, Ferroelectrics, Vol102 pp 359-363 (1990)S. Parameswaran, K.K.Karmarkar and A.M.Varaprasad (1988) Preparation and characteriza -tion of 123 oxide materials, Indo-US workshop on Microstructure characterization of materials, NCML, Bombay.A.M.Varaprasad (1986) Dielectric Relaxations in some Polymer - PZT composites, Proc. of the 3rd US-Japan seminar on dielectric and piezoelectric ceramics, Toyoma, Japan.A.M.Varaprasad (1987) Structural, dielectric and Piezoelectric properties of 3-1and 3-3 PZT-Polymer composites, Lecture notes of the COSTED(UNESCO) workshop on Underwater Transducer Technology, Vol.1, Chapter-III.A.M.Varaprasad (1987) Piezoelectric Polymers, Lecture notes of the COSTED (UNESCO) workshop on Underwater Transducer Technology, Vol.2.A.M.Varaprasad and N.M.Gokhale (1985) Structural and dielectric studies of PZTPolymer composites, Proceedings of the National symposium on Ferroelectrics, IISc, BangaloreK.Uchino, T.Hirose and A.M.Varaprasad (1987) Accoustic emission associated with ferroelectric polarization reversal, Proc. of the conference on applications of Ferroelectrics, Kyoto, Japan (in Japanese)T.Hirose, K.Uchino and A.M.Varaprasad (1987) Accoustic emission measurements in ferroelectric materials, Proc. of the DAE symposium on Solistate Physics.A.M.Varaprasad and K.Uchino (1987) Electrical conductivity and dielectric relaxations in PZT-PVDF composites, Proce. American Ceramic society Meeting of Electronics Division, Pittsburg, USA.A.M.Varaprasad (1986) Dielectric relaxation studies on PZT-PVDF composites, 4thNational seminar on Dielectrics and Ferroelectrics, IIT Kharagpur.A.M.Varaprasad, Report on Broadband Electromagneticwave absorbers, DRDO Head Quarters, Part-I, Sept.1986A.M.Varaprasad, Report on Broadband Electromagneticwave absorbers, DRDO Head Quarters, Part-II, Oct.1986A.M.Varaprasad, Recent trends in electronics in Japan, Silver Jubilee lecture of Indian Technical Education Society IETS, Bombay, Dec 1987.A.M.Varaprasad,On the utility of atomic absorption spectroscopy in electronic materials research, Workshop on Atomic Absorption Spectroscopy, Dec 1985,NCML, Bombay.U. Rajagopal and A.M.Varaprasad, Sintering studies on carbonyl nickel powders,Internation Powder Metallurgy conference, USA, Dec. 1986.T.Raghu, P.Ramakrishnan and A.M.Varaprasad, Sintering studies on porous stainless steel filters, TMS Annual Meeting, Jan. 1988.A.M.Varaprasad and S.Parameswaran, Double layer Microwave absorber with 123 oxide, Solidstate Physics symposium, Dec 1987.A.M.Varaprasad, High temperature oxidation / corrossion studies on NiCrAlY and Y-ZrO2 protective coatings, Sept. 1999, Goa, Proc. 9th National Congress on Corrosion control, pp 236-240 (1999)A.M.Varaprasad, Structural and dielectric studies of some Ceramic-Polymer composites, Proceedings of ICCE/8, Spain, August 2001, pp 949-950.A.M.Varaprasad and K. Jagadeesh Babu, A swastik shaped MIMO antenna with improved bandwidth and isolation, Indian Antenna week, Gangtak, Sikkim, May 2012.Omprasad, A.M.Varaprasad, Ajay Prakasah and DVK Sastry, Design and simulation of Piezoelectric MEMS structures for RF Applications, International workshop on Physics of Semiconductor Devices, Dec 2010, SSPL, Delhi.A.M.Varaprasad, Designing of layered Piezoelectric PZT based MEMS Switch and high frequency simulation, Symposium on Electronic materials and Applications EMA2010, American ceramic society meeting, Jan.2010.A.M.Varaprasad, Piezoelectric MEMS based technologies for Aerospace applications, Proc. Int. Conference on Nano & Bio-sciences, Feb.24-26, Hyderabad, 2010 pp23.
|Papers Published in Journals
Inter National: 25
|Papers Presented in Conferences
Inter National: 15
Inter National: -
|Workshops Attended|| - |
|Faculty Developement Programs Attended||30|
||Ph.D: 1 PG: 2 UG: 5
|Books Published / IPRs / Patents || - |
|Professional Memberships ||4|
|Consultancy Activities || - |
|Awards || - |
|Grants Fetched || - |
|Others || - |