Skip to main content
Article thumbnail
Location of Repository

The Development of Microwave Thermal Analysis (MWTA)and its application to the study of Carbons and other materials

By Ian Hamilton


This research involves the development of a totally new approach to thermal analysis in which\ud microwave energy is used not only to heat the sample but also to detect thermally induced\ud transformations via the effects of changes in its dielectric properties. Use of these properties, rather than the more usual mass or enthalpy changes of conventional thermal analysis, provide a unique insight into thermal processes.\ud \ud Microwave thermal analysis (MWTA) is a technique for studying the efficiency of the conversion of\ud microwave to thermal energy by measuring the microwave power-temperature relationship for different materials. Power/temperature verses time profiles in some cases give an indication of physical and chemical changes occurring in the sample, via changes in the dielectric constant.\ud \ud \ud An instrument for performing microwave thermal analysis (MWTA) has been designed, constructed\ud and applied to an extensive range of chemical systems exhibiting a variety of physicochemical\ud transformations, including melting, decomposition and solid-solid phase changes. MWTA has been\ud shown to provide both qualitative and quantitative information with sample masses ranging from the analytical (1 to 20 mg) to semi-preparative (0.5 to 5.0 g) scales. It has been demonstrated that MWTA can be used in conjunction with complementary techniques such as differential thermal analysis (DTA)\ud and X-ray powder diffraction (XRD) to provide additional data. MWTA has the potential to be\ud extended to incorporate some of the latest developments in thermal analysis, including methods involving temperature modulation and evolved gas analysis.\ud \ud \ud MWTA has the potential to have applications in the design of industrial processes by providing\ud detailed information on the effect of microwave radiation on both physical (e.g. phase changes) and chemical processes

Topics: Q1, QD
OAI identifier:

Suggested articles


  1. 4,4’- Azoxyanisole for temperature calibration of differential scanning calorimeters in the cooling mode- yes or no? doi
  2. A comparative study of the thermal reactivities of some transition metal oxalates in selected atmospheres. doi
  3. (1984). A study of the polymorphism of potassium nitrate starting from room temperature and at atmospheric pressure Thermochimica Acta. doi
  4. (1955). A theory of differential thermal analysis and new method of measurement and interpretation J Amer Ceram Soc.
  5. (1995). AKA. X-Ray and thermogravimetric studies of hydrated Li2WO4. materials science and engineering doi
  6. An assessment of the solid state reactivity of sodium bicarbonate in the presence of solid dental excipients using thermal analysis. doi
  7. An overview of calibration materials used in thermal analysis-benzoic acid. Thermochimica acta. doi
  8. (1993). Applications of a New Quadrupole MassSpectrometer System for Simultaneous Thermal-Analysis - Evolved Gas-Analysis. Journal of Thermal Analysis. doi
  9. Critical study of the differential thermal method for the identification of the clay minerals American ceramic society 1939;22:54. doi
  10. (2004). Development of a microwave calorimeter for simultaneous thermal analysis, infrared spectroscopy and dielectric measurements. Measurement Science & Technology. doi
  11. (2000). Development of a new instrument for performing microwave thermal analysis. Review of Scientific Instruments. doi
  12. Development of a novel instrument for Microwave Dielectric Thermal Analysis (MDTA). doi
  13. (2006). Development of a novel instrument for microwave dielectric thermal analysis. Review of Scientific Instruments. doi
  14. (1954). Dielectric material and their applications
  15. (1977). Differential thermal analysis - A guide to the technique and its applications: Heyden & Son Ltd
  16. (1998). Effect of structural changes on DC ionic conductivity of rubidium nitrate single crystals. Phys Status Solidi B. doi
  17. (1995). Emmeline Law, Paul Bicknell A method of assessing solid state reactivity illustrated by thermal decomposition experiments on sodium bicarbonate Thermochimica Acta doi
  18. Evolved Gas Analysis Analytical proceedings 1990;27:150.
  19. Fifth report to the alloys research committee: Steel. Proc Inst Mech Engrs.
  20. (1996). Heating rate of minerals and componds in microwave field Transactions of NFsoc.
  21. HPR-20 QIC System operation manual. Publications Publications Investigation of the microwave dielectric heating characteristics of various carbon adsorbents GMB Parkes,
  22. (2005). Hybrid microwave/conventionally heated calorimeter. Review of Scientific Instruments. doi
  23. (1983). Industrial microwave Heating London Peter Peregrinus
  24. (1988). Introduction to thermal analysis : Techniques and applications Chapman and doi
  25. Liptay Thermoanalytical properties of analytical – grade Reagents – IVA sodium salts. doi
  26. Magdalena olszak-humienik jm. Eyring parameters of dehydration proceses. thermochimica acta doi
  27. (1984). Mass spectrometric evolved gas analysis-an overview. Thermochimica Acta. doi
  28. (2005). Microwave Assisted Organic Synthesis Blackwell publishing doi
  29. Microwave assisted removal of organic pollutants from aqueous effluent streams.
  30. (1999). Microwave differential thermal analysis in the investigation of thermal transitions in materials. Analytical Chemistry. doi
  31. Microwave thermal analysis - A new approach to the study of the thermal and dielectric properties of materials.
  32. Microwaves in Organic and Organometallic Synthesis. doi
  33. (1992). Microwaves: Industrial, Scientific and Medical Applications London: Artech House publisher
  34. Modulated temperature calorimetry of silver iodide in the presence of microwave radiation. Thermochimica Acta.46. doi
  35. Naoki Igawa, Kenji Noda, Hideo Ohno Phase identification and electrical conductivity of Li2WO4 Solid state ionics 1997;96:61-74. doi
  36. (1998). Phase transitions in KNO3 studied by variable-temperature 15N Majicangle NMR spectroscopy Journal of solid state chemistry doi
  37. Physical and dielectric properties of pharmaceutical powders Powder technology doi
  38. (2005). PID control – new identification and design methods SpringerVerlag London Limited
  39. (1998). Principles of instrumental analysis. 5 ed. Saunders golden sunburst series: Saunders college pulishing
  40. (2002). Principles of Thermal analysis and calorimetry: RSC paperbacks doi
  41. (2002). Principles of thermal analysis and calorimetry. Cambridge: The Royal Society of Chemistry doi
  42. (2000). Qualitative and quantitative aspects of microwave thermal analysis. Thermochimica Acta. doi
  43. (1994). Recent advances in thermal analysis techniques. Chemistry in
  44. (1996). Recent progress in microwave processing of polymers and composites. Trends in Polymer Science.
  45. Sairem Data Sheet
  46. (2003). Speziali Structural and calorimetric studies of mixed K2MoxW(1-x)O4 (0≤x≤1) compounds Physica B. doi
  47. Structure and thermal interpretation of the synergy and interactions between the fire retardants magnesium hydroxide and zinc borate Polymer Degradation and stability doi
  48. (1986). Temperature and Frequency-Dependence of ElectricConductivity near the Successive Phase-Transition Points of Rubidium Nitrate Crystal. Solid State Commun. doi
  49. Teplov Thermal and emission processes in the thermal decomposition of strontium hydroxide in vacuum Inorganic materials 1986;22(4):614.
  50. (1992). The Decomposition of Copper Oxalate to Metallic Copper Is Well Suited for Checking the Inert Working-Conditions of ThermalAnalysis Equipment. Thermochimica Acta. doi
  51. (2006). The thermal decomposition of copper(II) oxalate revisited. Thermochimica Acta. doi
  52. The thermal decomposition of copper(II) oxalate revisted Thermochimica Acta. doi
  53. The thermal dehydration of Na2WO4.2H2O Thermochimica acta 1995;250:85-96. doi
  54. The Thermal transformations in solid Rubidium nitrate. Acta Cryst. doi
  55. The Use of Microwave-Ovens for Rapid Organic-Synthesis. Tetrahedron Letters. doi
  56. (1997). Thermal analysis of calcium oxalate samples obtained by various preparative routes. Thermochimica Acta. doi
  57. (2006). Thermal behavior of aluminum powder and potassium perchlorate mixtures by DTA and TG. Thermochimica Acta. doi
  58. (2003). Thermal characteristics of manganese (II) nitrate hexahydrate as a phase change material for cooling systems. Applied Thermal Engineering. doi
  59. Thermal decomposition of strontium hydroxide doi
  60. (1964). Thermal methods of analysis. Texas: interscience publishers
  61. Thermal runaway in microwave heating: A mathematical analysis Applied mathematical modelling. doi
  62. (2001). Thermal treatments of activated carbon fibres using a microwave furnace. Microporous and Mesoporous Materials. doi
  63. Thermal-Analysis with Microwaves - Temperature and Power-Control. doi
  64. Thermal, electrical and structural properties of doi
  65. To what extent is thermal analysis an analytical method?
  66. (1967). Tungsten and its compounds: Pergamon press oxford doi
  67. (1987). Use of Low-Power and High-Power Microwave-Energy for ThermalAnalysis. Thermochimica Acta. doi
  68. Use of Microwaves in Thermal-Analysis. doi
  69. Vaidhyanathan Hysteresis in the β-α phase transition in silver iodide Journal of thermal analysis and calorimetry doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.