/ / TG-DTA technique is a technique used to study the change of phase of the samples. And to estimate the temperature on the calcined This technique consists of two analysis system is the first TGA (thermogravimetric analysis) is a technique used to measure the change of physical That is a part used in the study and test of mass conversion of substances that are functions of temperature. The second is DTA. (differential thermal analysis) is a technique used to measure the chemical changes of substance which is in the shape of a vacuum heat (endothermic). Or exothermic (exothermic) of the samples in the experiment to measure temperature around the area of the reference and the sample. So the difference of temperature. Is from the sample absorb or emit. Most exotherms resulting from combustion of organic compounds in the sample and to absorb heat resulting from the evaporation of water. This information from the comparison with the sample reference. Its properties are substances, no deformation and no absorption or emit in the temperature range of measurement, such as α - Al2O3 in this experiment reference substances are heated together. With the sample. Therefore, it can be concluded that the change occurred as a result of the change of the sample solution. The results of a study by this technique can be approximately the temperature used to calcine substance, for example a compound with the structure and composition as required. In this research, brand machine by use of Perkin Elmer Instrument version Pyris Diamond located at the Department of chemistry, Faculty of science, University. The temperature of the system increased by the rate of 10 oC / minute. Under normal atmosphere temperature range 50-1000 oC reference substance is used. α - Al2O3.
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