Manpower Details

Designation: Director General
Emp ID: 1370
Work Place: Head Quarter
Specialisation:

DIRECTOR

Symposia / Conferences

  1. Silicon Carbide (SiC) Single Crystal Bulk Growth and Challenges -
    Sandeep Mahajan, M. V. Rokade, S. T. Ali, Arbind Kumar, N. R. Munirathnam,  S. Deb, D. V. Sridhara Rao, L. Durai, B. Srivathsa, P. K. Sahu, S. Saha,  V. V. Bhanuprasad, O. P. Thakur and A. K. Garg
    International Conference of Young Researchers on Advanced materials (IUMRS-ICYRAM 2016)

  2. Silicon Carbide (SiC) for next generation electronic innovations - Single Crystal  bulk growth and challenges;
    18th International workshop on Physics of semiconductor devices (IWPSD) organized by Materials Research Society of India (MRSI) – 2015 held at IISC Bangalore during  December 07-10, 2015;
    Sandeep Mahajan, M. V. Rokade, S. T. Ali, N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, L. Durai, V. V. Bhanuprasad and A. K. Garg

  3.  Growth of 2″ Silicon Carbide (SIC) Single Crystal – Unique Wide Band Gap Semiconductor for  Advanced Electronic Applications;
    Third International Symposium on Semiconductor Materials and Devices” (ISSMD-3) held at Anna University during 02-05 February, 2015;
    S. T. Ali, Sandeep Mahajan, M. V. Rokade, N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, M. Vijaya Kumar and A. K. Garg

  4. Silicon Carbide (SiC) Single Crystal Growth by Physical Vapor Transport and Challenges; 
    26th Annual General Meeting of Materials Research Society of India (MRSI) – 2015 held at Jaipur during  February 09-11, 2015;
    Sandeep Mahajan, M. V. Rokade, S. T. Ali, N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, M. Vijaya Kumar and A. K. Garg

  5. Silicon Carbide (SiC), a WBG semiconductor for electronic applications, single crystals bulk growth and characterization;
    19th National Seminar on Crystal Growth” held at VIT University during 12-14th March 2015;
    S. T. Ali, Sandeep Mahajan, M. V. Rokade, N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, L. Dirai, V. V. Bhanuprasad and A. K. Garg

  6. Characterization of Silicon Carbide (SiC) single crystal grown by vapor phase transport (PVT) technique;
    Third International Symposium on Semiconductor Materials and Devices” (ISSMD-3) held at Anna University during 02-05 February, 2015;
    M. V. Rokade, Sandeep Mahajan, S. T. Ali,  N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, M. Vijaya Kumar and A. K. Garg

  7. "Characterization of Silicon Carbide (SiC) single crystal grown by vapor phase transport (PVT) technique";
    Third International Symposium on Semiconductor Materials and Devices” (ISSMD-3) held at Anna University during 02-05 February, 2015;
    M. V. Rokade, Sandeep Mahajan, S. T. Ali,  N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, M. Vijaya Kumar and A. K. Garg

  8. Growth of 2″ Silicon Carbide (SiC) Single Crystal – Unique Wide Band Gap Semiconductor for Advance Electronic Application-
    Sandeep Mahajan, M. V. Rokade, S. T. Ali, N. R. Munirathnam, S. Deb, D. V. Sridhararao, M. Vijayakumar and A. K. Garg;
    25th MRSI Conference held at IISC Bangalore during 12-14 Feb, 2014.

  9.  Silicon Carbide (SiC) single crystal: A futuristic material; All India Seminar on “Emerging technologies in Material Science and Engineering held at Institute of Aeronautical Engineering Dundigal, Hyderabad during 18-03-2014 to 19-03-2014.
    Sandeep Mahajan, M. V. Rokade, S. T. Ali,  N. R. Munirathnam

  10. Growth of 2” Silicon carbide (SiC) Single Crystal – Unique Wide Band Gap Semiconductor for Advanced Electronic Appliction; 25th Annual General Meeting of Materials Research Society of India (MRSI) – 2014 held at IISC Bangalore from 12-02-2014 to 14-02-2014.
    Sandeep Mahajan, M. V. Rokade, S. T. Ali,  N. R. Munirathnam, S. Deb, D. V. Sridhara Rao, M. Vijaya Kumar and A. K. Garg;

Patents

  1. A FILTRATION APPARATUS FOR THE REMOVAL OF OXIDES DURING THE PURIFICATION OF CADMIUM,  N. R. Munirathnam, D. S. Prasad, Patent No. 277702 granted on 29.11.2016

  2. AUTOMATIC SPEED CONTROLLER FOR ZONE REFINER, N.R. Munirathnam, D. S. Prasad, T. L. Prakash, Patent submitted, Application No. 1070/DEL/2012.

Journals

  1. Kinetics of Hafnium - Zirconium separation in solvent extraction using TBP Reddy, Raghu C.; Kumar, Arbind; Munirathnam, N.R.; Proceedings of the conference on advances in refractory and reactive metals and alloys; Record. 47076189, INIS, volume. 47, Issue, 26. 2017.
     

  2. Quantitative estimation of brominated compounds for restriction of hazardous substances (RoHS) present in computer key board switches (CKBS) using gas chromatography-mass spectrometry, Ramaswamy Kadari; Govindaiah Rabba, Swarnabala Ganti, Mahender Bhukya, Rambabu Urlagaddala,Ravi Prakasa Reddy Manda, Nagegownivari Ramachandra Munirathnam, J. Analytical Chemistry, Jan 2016, Vol 71, Issue 1, PP 133-139.

  3. A promising RVO4:Eu3+,Li+@SiO2 (R = Gd, Y and Gd/Y) red-emitting phosphor with improved luminescence (cd/m2) and colour purity for optical display applications; Urlagaddala Rambabu, Nagegownivari Ramachandra Munirathnam, Busireddy Sudhakar Reddy and Sandip Chatterjee; Luminescence, Volume 31, Issue 1, pages 141–151, February 2016.
     

  4. Nanostructured layered Sn3O4 for hydrogen production and dye degradation under sunlight; S. D. Balgude,   Y. A. Sethi,   B. B. Kale,   N. R. Munirathnam,   D. P. Amalnerkar  and   P. V. Adhyapak; RSC Adv., September 2016,6, 95663-95669; DOI: 10.1039/C6RA20058C.

  5. Degradation of organic pollutants by Ag, Cu and Sn doped waste non-metallic printed circuit boards; Kadari Ramaswamy, Velchuri Radha, M. Malathi, Muga Vithal, Nagegownivari R. Munirathnam; Waste Management, http//dx.doi.org/10/1016/j/wasman.2016.09.026

  6. Synthesis, characterization and tin/copper–nitrogen substitutional effect on photocatalytic activity of honeycomb ordered P2-Na2Ni2TeO6; Ramaswamy Kadari,  Radha Velchuri, , K Sreenu, Gundeboina Ravi,  Nagegownivari R Munirathnam and Muga Vithal; Res. Express 3 (2016)115902; doi:10.1088/2053-1591/3/11/115902.

  7. Investigation of Tantalum Recycling by Electron Beam Melting, Katia Vutova ,  Vania Vassileva , Elena Koleva, Nagegownivari Munirathnam , Dinesh P. Amalnerkar  and Takeshi Tanaka; Metals 2016, 6(11), 287; Doi:10.3390/met6110287

  8. Nanostructured CdS sensitized CdWO4 nanorods for hydrogen generation from hydrogen sulfide and dye degradation under sunlight; Yogesh A Sethi, Rajendra P Panmand, Sunil R Kadam, Aniruddha K Kulkarni, Sanjay K Apte, Sonali D Naik, N Munirathnam, Milind V Kulkarni, Bharat B Kale; Journal of Colloid and Interface Science; vol.487, Feb., 2017, Pages 504-512. http://dx.doi.org/10.1016/j.jcis.2016.10.063

  9. Effect of cation/anion co-doping on the photocatalytic performance of Na3SbO(PO4)2; Radha Velchuri, Ramaswamy Kadari, G. Ravi, N. R. Munirathnam, and M. Vithal, Journal of Inorganic and General Chemistry 641, issue 5, (2015) 935-940.

  10. Investigation of conduction and relaxation phenomena in BaZrxTi1−xO3 (x=0.05) by impedance spectroscopy -
    Sandeep Mahajan, Divya Haridas, S.T. Ali, N.R. Munirathnam, K. Sreenivas, O.P. Thakur, Chandra Prakash;
    Physica B Condensed Matter 10 (2014) 114

  11. Simple and easy method of sample preparation for mercury analysis in compact  fluorescent lamps. G. Swarnabala, B. Divya, B. Mahender, K. Ramaswamy, U. Rambabu, M.R.P. Reddy, N. R . Munirathnam, Analytical Chemistry, 14 (2) (2014).

  12. Synthesis, characterization and silver/copper-nitrogen substitutional effect on visible light driven photocatalytic performance of sodium hexatitanate nanostructures Naveen Kumar Veldurthi, Radha Velchuri, Someshwar Pola, Guduru Prasad, Nagegownivari R. Munirathnam and Muga Vithal, Journal of Chemical Technology & Biotechnology (2014) DOI: 10.1002/jctb.4466

  13. Facile ion exchange synthesis and visible light photocatalytic studies of Cu2+, Sn2+ and Ag+ substituted LiMg0.5Ti0.5O2. Naveen Kumar Veldurthi, G.Ravi, J.R.Reddy, Suresh Palla, N.R.Munirathnam, G.Prasad and M.Vithal, Journal of the American Ceramic Society 1–8 (2014) DOI: 10.1111/jace.12826.

  14. Investigation of micropipe and defects in molten KOH etching of 6H - n-silicon carbide (SiC) single crystal” -
    Sandeep Mahajan, M. V. Rokade, S. T. Ali, K. Srinivasa Rao, N. R. Munirathnam, T. L. Prakash, D. P. Amalnerkar;
    Materials Letters 101 (2013) 72–75

  15. Investigation of micropipe and defects in molten KOH etching of 6H n-Silicon Carbide (SiC) Single Crystal; Sandeep Mahajan, M. V. Rokade, S. T. Ali, K. Srinivasa Rao, N. R. Munirathnam, T. L. Prakash and D. P. Amalnerkar; Materials Letters 101(2013) 72-75.  DOI 10.1016/j.matlet 2013.03.079

  16. Influence of Bi­3+ as a sensitizer and SiO2 shell coating as a protecting layer towards the enhancement of red emission in LnVO4: Bi3+, Eu3+ @ SiO2 (Ln = Gd, Y and Gd/Y) powder phosphors for optical display devices; U. Rambabu, N. R. Munirathnam, S. Chatterjee, B. Sudhakar Reddy, Sang-Do Han; Ceramics International 39 (2013) 4801–4811

  17. Investigation of micropipe and defects in molten KOH etching of 6H n-silicon carbide (SiC) single crystal; Sandeep Mahajan, M.V. Rokade, S.T. Ali, K. Srinivasa rao, N.R. Munirathnam, T.L. Prakash and D.P. Amalnerkar; Materials Letters, 101 (2013) 72-75.

  18. Characterization, conductivity and photocatalytic studies of AHfM(PO4)3 (A = Na and Ag; M = Ti and Zr) powders synthesized by sol–gel method,  Suresh Palla , G. Ravi , J. R. Reddy, Naveen Kumar Veldurthi,  Radha Velchuri, G. Prasad,  N R  Munirathnam,  M. Vithal; Sol-Gel Sci Technol (2013) 67:507–518

  19.  Preparation, Characterization, Photocatalytic Activity and Conductivity Studies of YLnTi2O7 (Ln = Nd, Sm, Eu and Gd), V Rama Devi, G Ravi, Radha Velchuri, N R Munirathnam, G Prasad, M Vithal, Transactions of the Indian Ceramic Society, Volume 72, Issue 4, 2013.

  20. Preparation, optical, and photocatalytic studies of defect pyrochlores: KCr0.33W1.67O6 and A x Cr0.33W1.67O6•nH2O, G. Ravi, Naveen Kumar Veldurthi, Muvva D. Prasad,   N R Munirathnam,  G. Prasad,  M. Vithal, Journal of Nanoparticle Research, August 2013, 15:1939.

  21. Effects of host composition, Al3+ as a sensitizer and SiO2 surface coating on luminescence intensity, color purity of MVO4: Al3+, Eu3+ @ SiO2 (M = Gd, Y and Gd/Y) red phosphors, U. Rambabu,  N. R. Munirathnam, D.P. Amalnerkar,  T. L. Prakash,  B. Sudhakar Reddy,  S. Chatterjee,Materials Chemistry and Physics, Volume 142, Issues 2–3, 15 November 2013, Pages 459–468

  22. Characterization, conductivity and photocatalytic studies of AHfM(PO4)3 (A = Na and Ag; M = Ti and Zr) powders synthesized by sol-gel method;   Suresh Palla, G. Ravi, J. R. Reddy, Naveen Kumar Veldurthi, Radha Velchuri, G. Prasad, N. R. Munirathnam and M. Vithal, Journal of Sol Gel Scince and Technology 67 (2013) 507-518.

  23. Preparation of high pure Zinc for electronic application using selective evaporation under Vacuum, ST Ali, K Srinivasa Rao, C Laxman, N R Munirathnam and T L Prakash , Separation and Purification Technology 85 (2012) 78-82.

  24. Purification of cadmium by selective volatization in vacuum in the presence of presence of oxide       phase on its melt,   N R Munirathnam, K Srinivasa Rao and T L Prakash , Bulletin of Materials Science, Issue 2, Vol-35 (2012).

  25. G. M. Lalev, J. -W. Lim, N. R. Munirathnam, G. -S. Choi, M. Uchikoshi, K. Mimura, M. Isshiki, “Purification of Cu by hydrogen plasma-arc zone melting and characterization of trace impurities by secondary ion mass spectrometry”, Materials Characterization Vol.60, issue 1, Jan., 2009, pp. 60-64.

  26. G. M. Lalev, J. -W. Lim, N. R. Munirathnam, G. -S. Choi, M. Uchikoshi, K. Mimura, M. Isshiki, “Concentration Behavior of Non-Metallic Impurities in Cu Rods Refined by Argon and Hydrogen Plasma-Arc Zone Melting”, Materials Transactions, Vol. 50, No. 3 (2009) pp. 618 to 621.

  27. G. -S. Choi*, J. -W. Lim, N. R. Munirathnam, I. -H. Kim, “Purification of niobium by multiple electron beam melting for superconducting RF cavities” Metals and Materials International, Volume 15, No.3, June 2009, pp. 385-390.

  28. Synthesis and characterization of Ag doped CaWO4 powder phosphors for optical emission, U. Rambabu, N.R. Munirahnam and T.L. Prakash, J. Opto-Electronics and Advanced Materials, vol. 11 (11) (2009) 1841

  29.  Preparation of 5N grade tantalum by electron beam melting, Good-Sun Choi, J.W. Lim, N.R. Munirathnam, Il-Ho Kim, Joon-Soon Kim, J. Alloys and compounds, vol., 469, isuue 1-2, 2009, pp. 298-303.

  30. Concentartion behavior of non-metallic impurities in Cu rods refined by Argon and hydrogen plasma-arc zone melting, G.M. Lalev, J. W. Lim, N.R. Munirathnam, G.S. Choi, M. Uchikoshi, K. Mimura and M. Isshiki, Materials Transactions Vol. 50 , No.3 (2009) pp. 618 to 621.

  31. Line selection and evaluation of radio frequency glow discharge atomic emission spectrometry in the determination of trace amounts of niobium in electron beam-melted tantalum sheet, G. Anil, M.R.P. Reddy, S. Rajesh Kumar, N.R. Munirathnam and T.L. Prakash, Atomic spectroscopy, vol 29(1), Jan/Feb. 2008.

  32. Determination of oxygen in high purity cadmium by radio frequency glow discharge optical emission spectrometry, G. Anil, M.R.P. Reddy, S.T. Ali, N.R. Munirathnam and T.L. Prakash, Atomic spectroscopy, vol. 29(3), May/June, 2008, USA.

  33. J. -W. Lim, M. -S. Kim, N. R. Munirathnam, M. -T. Le, M. Uchikoshi, K. Mimura, M. Isshiki, H. -C. Kwon, G. -S. Choi*, “Effect of Ar/Ar-H2 plasma arc melting on Cu purification”, Materials Transactions, Vol. 49, No. 8 (2008) pp. 1826 to 1829.

  34. K.-H. Heo, N. R. Munirathnam, J. -W. Lim, M. -T. Le, G. -S. Choi*, “Effect of oxygen and yttrium doping on the electrical resistivity and hardness of titanium metal obtained by electron beam melting”, Journal of Materials Chemistry and Physics, Vol. 112, Issue 3, 2008, pp. 923-927.

  35. Determination of Effective distribution coefficient of impurities during zone refining of  tellurium - D. S. Prasad, N. R. Munirathnam, J. V. Rao and T. L. Prakash; International Journal of Modern Physics B; Vol. 22 (16) (2008), p.2583-88.

  36. Ultra high purification of gallium from 4N to 6N5 through Indian raw material sources - U. Rambabu, N. R. Munirathnam and T. L. Prakash; Materials Chemistry and Physics, Vol. 112 (2008) 485.

  37. Reduction of trace oxygen by hydrogen leaking during selective vaporization to produce ultra-pure cadmium for electronic applications; S.T.Ali, N. R. Munirathnam, Ch.Sudheer,  R.C.Reddy, M.R.P.Reddy, T.L. Prakash; Materials Letters 61 (2007) 1512 – 1516.

  38. Profiling of selenium removal in hydrogen ambient zone refined tellurium bar using RF-GDOES, G. Anil, M.R.P. Reddy, D.S. Prasad, S.T. Ali, N.R. Munirathnam and T.L. Prakash, Materials Characterization  58, 2007, 92-95.

  39. Synthesis and characterization of morphologically different high purity gallium oxide nanopowders, U. Rambabu, N. R. Munirathnam, T. L. Prakash, B. Vengalrao, S. Buddhudu, J. Materials Science, vol., 42, no. 22/ November 2007, pp 9262-9266.

  40. Nearly Mono-diserse quantum Dots ZnSe: Synthesis and Characterization; K. Srinivasa Rao, N. Singh, K. Gurunathan, R. Marimuthu, N.R. Munirathnam, T.L. Prakash, P.K. Khanna; Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 37; 497-499, 2007.

  41. Effect of multi pass, zone length and translation rate on segregation of impurities during zone refining of tellurium, D.S. Prasad, N.R. Munirathnam, J.V. Rao and T.L.Prakash, Vol 60, 15, 2006, Materials Letters, 1875-79.

  42. A novel in-situ technique of ultra purification of cadmium for electronic applications, S T Ali, R. C. Reddy, N. R. Munirathnam, Ch. Sudheer, G. Anil, T. L. Prakash; Separation and Purification Technology 52 (2006) 288-294.

  43. Purification by Sub-Boiling Distillation and ICP-OES Analysis of High Purity HCl and HNO3 Used for Semiconductor Applications, G. Anil, M.R.P. Reddy, Ch. Sudheer, N.R. Munirathnam and T.L. Prakash, Atomic Spectroscopy, 27(1),  2006, 26-29.

  44. Purification of tellurium by single-run multiple vacuum distillation technique, S. T. Ali, D. S. Prasad, N. R. Munirathnam and T. L. Prakash, Separation and Purification Technology, 43 (2005) 263-267.

  45. Removal of Selenium and preparation of 7N tellurium for optoelectronic device Applications. N.R.Munirathnam, D.S. Prasad, J.V.Rao and T.L.Prakash,  Phosphorous,  Sulfur, silicon and related elements, vol. 180, No. 3-4, March-April , 2005.

  46. Purification of tellurium upto 5N by vacuum distillation; D.S. Prasad, N.R. Munirathnam, J.V. Rao, T.L. Prakash, Materials Letters, 59 (2005) pp. 2035-2038.

  47. Segregation behaviour of trace metal impurities during ultra high purification of gallium by zone refining; U. Rambabu, N.R. Munirathnam, R.C. Reddy and T.L. Prakash;  Indian J. of Pure and Appl. Phys., 43 (2005) 787.

  48. Method of preparation and Characterization of high purity tellurium oxide for optoelectronic and nuclear medicine applications, N.R. Munirathnam, S. Rajesh Kumar, D.S. Prasad, Ch. Sudheer, T.L. Prakash; Metals, Materials and processes, Vol. 17 (2005) No.2, pp. 161-164.

  49. High purity tellurium production using dry refining proceses. N.R. Munirathnam, D.S. Prasad, J.V. Rao and T.L. Prakash, Bulletin of Materials Science, Vol. 28, No.4, July 2005, 309-311.

  50. Zone refining of Cadmium and related characterization,  N.R. Munirathnam,  D.S. Prasad, J.V.Rao, Ch. Sudheer and T.L.Prakash, vol. 28 (3), Bulletin of materials science, 2005, 209-212.

  51. Purification of cadmium by vacuum distillation and its analysis, S. T. Ali, N. R. Munirathnam, C. Sudheer, R. C. Reddy and T. L. Prakash, Materials Letters, 58 (2004) p 1638- 1641.

  52. Purification of tellurium to 6N+ by quadruple zone refining,  N.R. Munirathnam, D.S. Prasad, Ch. Sudheer and T.L.Prakash; vol. 254,  Journal of crystal growth, 2003.

  53. Preparation of high purity tellurium by zone refining. N. R. Munirathnam, D.S.Prasad, Ch. Sudheer, A.J.Singh and T.L.Prakash, published in ‘Bulletin of materials science’ vol. 25, No.2, April 2002, pp 79-83.

  54. Tellurium purification: Various techniques and limitations, D. S. Prasad, Ch. Sudheer, N. R. Munirathnam and T.L.Prakash, ‘Bulletin of materials science’ vol. 25, No.6, Nov.,  2002.

  55. Emission spectra of LnPO4:RE3+ (Ln = La, Gd, RE = Eu, Tb and Ce) powder phosphors, U. Rambabu, N.R. Munirathnam, T.L. Prakash and S. Buddhudu, Materials Chemistry and Physics 78 (2002) 160-169.

  56. Mossbauer  measurements of amorphous  Fe72-x Ni10+x-y Moy B16 Si2,; A.K. Bhatnagar, B. Seshu, G.V. Sudhakar Rao, N.R. Munirathnam, J. Non-cryst. Solids, 204 PP.305-308 (1996).

  57. Thermoelectric and calorimetric studies on (Fe1-x Cox )75 Si15 B10;  N.R.M. Rathnam, A.K. Bhatnagar  and O.V. Nielsen; Key Engg. Materials, Vol. 13-15, PP 489-492 (1987).

  58. Stable Al-Cu-Ru Icosahedral Crystals: A new class of electronic alloys; B.D. Biggs, S.J. Poon and N.R. Munirathnam, Phys. Review Letters, vol. 65, No.21 PP. 2700-2703 (1991).

  59. Comparison of magnetic and electrical properties of amorphous (Fe1-x M x) 75 Si15 B10 : M = Co, Cr; A.K. Bhatnagar, G. Venugopal Rao and N.R. Munirathnam;  J. of Applied Physics, Vol.70 (10), PP. 6320-6322 (1991).

  60. Crystallization studies on (Fe1-x Cox)75 Si15B10 metallic glasses by electrical resisticity;  N.R.M. Rathnam and A.K. Bhatnagar ; Key Engg. Materials., Vol. 13-15, PP 343-346 (1987).

  61. Mossbauer and electrical studies on glassy alloy Fe72Co3Si15B10; A.K. Bhatnagar, B.B. Prasad, N.R. Munirathnam, N. Ravi, K.V. Rao and O.V. Nielsen; Proc. Fifth Int. Conf. On RQM., Vol 2., PP 1055-1056 (1985).

  62. Magnetic, electrical and thermoelectric studies on metallic glass Fe39 Ni39 Mo4 Si6 B12; A.K. Bhatnagar, B. Bhanu Prasad and N.R. Munirathnam; J. Non-Cryst. Solids, Vol.61 & 62 PP 1201-1206 (1984).

  63. Electrical resistivity and thermoelectric power of amorphous Fe40 Ni40 B20 alloy, A.K. Bhatnagar, N.R. Munirathnam and B. Bhanu Prasad; National Academy ‘Science Letters’ India Vol. 7(1984).

Books / Proceedings

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