Faculty member in charge: Praveen Ramamurthy

For usage contact: P. Padaikathan

1. The METTLER-TOLEDO Differential Scanning Calorimeter (DSC 822 e ) with S TA R e software measures the difference between the heat flows from the sample and reference sides of a sensor as a function of temperature or time. Differences in heat flow arise when a sample absorbs or releases heat due to thermal effects such as melting, crystallization, chemical reactions, polymorphic transitions… …

Specifications:

Sample mass/volume: minimum of 0.5 -20mg/up to 150ul

Temp range: Between -150°C and +700 o C

Cooling option: Liquid Nitrogen (pressurized to 20-30psi)

Heating rate: 2 – 50 K/min

Cooling rate: from 500 o C to 100 o C in 8min

Resolution: 0.4µW

Soon DSC will be upgraded with…..

Temperature-modulated DSC techniques (TMDSC) are widely used in thermal analysis to separate overlapping temperature-dependent and time-dependent thermal effects. Methods used up until now have overlaid the isothermal temperature or heating ramp with a (usually) sinusoidal temperature modulation of just one frequency (single frequency method).

Auto–Sampler Robot (for 32 No. of tests) and a LN 2 - Dewar capacity 240litre

Independent users (Mettler DSC):

1.Suresh(Satyam Suwas) (authorised to train others)

2.Soumitra Roy(Aloke Paul)

3.Eswar Prasad(U. Ramamurty)

4.Kiritiman(K.Chattopadhyay)

5.Ranjit(Praveen Ramamurthy)

 2. The NETZSCH STA 409 runs under PROTEUS Software for simultaneous TG-DSC or simultaneous TG-DTA measurements. The TG sample carriers exchanged with TG-DSC or TG-DTA modes operation with top-loaded samples ensure total protection of the balance, which is on the bottom and through accurate flow of the purge and protective gases

Specifications:

Temperature range: 25°C to 1600°C (SiC: HEATING ELEMENT)

Heating and cooling rates: 5 K/min to 50 K/min

Weighing range: 200 mg

TG resolution: up to 0.002mg

DSC resolution < 1 µW

Atmospheres: inert, oxidizing, reducing, static, dynamic

TG features:

Mass changes in wt% or mg

Automatic evaluation of mass-change steps

Calculation of mass/temperature values

Calculation of residual mass

Extrapolated onset and end temperatures

Peak temperatures of the 1st and 2nd derivative of the mass-change curve

Automatic baseline

DSC/DTA features:

Determination of onset, peak, inflection and end temperatures

Automatic peak search

Analysis of peak areas (enthalpies) with selectable baseline
Enthalpy determination allowing for mass changes
Comprehensive analysis of glass transitions

Independent users (NETZSCH TG/DTA):

1.Prasath Babu( S. Karthikeyan )(authorised to train others)

2.Soma prasad (Aloke Paul)

3.Anindya Roy(Vikram Jayaram)