What is really happening inside your material when you heat it? A change in mass (TG) tells you what happened, but not why. A thermal event (DTA or DSC) tells you something happened, but not what. Relying on one method alone is like reading only half the page.
This webinar reveals how the simultaneous technique of STA removes the guesswork. By linking every weight change directly to a thermal event, you get unambiguous answers, fast.
Join us for 30 minutes to learn how to unlock the true story of your materials!
What you will learn in this webinar
- Basic principles
- Applications
This webinar is recommended for
- Beginners
- Those who would like to remind themselves of the fundamentals of thermal analysis instruments
Q&A
Q1: Can STA observations of Wax Appearance Temperature (WAT) and Wax Disappearance Temperature (WDT) be applied to crude oil? How do we determine these points (WAT and WDT), by determining the initial temperature value of the STA/DSC reaction? As is known, WAT is the temperature at which the sample undergoes initial crystallisation, while WDT is the temperature at which the crystalline phase begins to disappear.
A: Yes, it is possible. But the differential scanning calorimeter (DSC) in compatibility with lots of cooling accessories is recommended to measure the WAT and WDT of crude oils. The former, which is the DSC-measured equivalent of the cloud point, is defined by the ASTM D4419 method as the temperature at which a crude oil sample first precipitates solid wax as it is being cooled under prescribed test conditions. The WAT is the onset temperature of the significant exothermic peak, indicating the start of wax crystallization. The latter is defined by the ASTM D4419 method as the temperature at which previously formed wax crystals, present in crude oils, fully redissolve back into the liquid phase as it is being heated under prescribed test conditions. The WDT is the highest melting transition temperature of the significant endothermic peak, indicating the end of wax crystal melting.
Q2: Would you let me know once again on the advance of difference beam length of TG part. (slide No.6)
A: It is a schematic diagram of TG beams for the sake of introducing the TG structure easily. Actually, the length of the two beams are the same during the real measurement parocess.
Q3: hi, do you have any comparison between DTA and DSC with same sample ? if you have please show
A: Thank you for your comments. Next time, I will prepare the relevant applications by STAvesta and DSC.
Q4: What's advantages of new STAvesta compared to previous Rigaku TG-DTA8122？
A: Thank you for your interest in our products. Compared to the previous model of TG-DTA 8122, the STAvesta is primarily featured by the following items: industry-first self-diagnostic feature ”vestaeye”, innovative FlatBlank function without manual intervention, compatibility with six types of electric furnace, 52 sample positions of an automatic sample changer, enhanced sealing and gas tubing design, and wider measurement temperature range from -40 ℃ to 1500 ℃.
Q5: Is there a possibility to have LN2 attachment on STAvesta ?
A: Unfortunately, it is not possible to attach an LN₂ cooling unit to the STAvesta.
Q6: One Customer asked as Furnace Design "It should be with ceramic protection and Pt/lr heating elements and with additional embedded temperature sensor in winding to ensure best temperature accuracy and precision." - do we match this design?
A: Thank you for your question. It belongs to a custom-built product. Please consult with design engineers of Rigaku by visit the official website or contact local distributors in your area.
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