Thermogravimetric Analysis

Thermogravimetric Analysis
TGA Curves used in failure analysis of polyamide nylon (PA) enclosures on terminal block plug, which thermally degraded and caused critical instrument failure. Plot shows two distinct volatilization temperatures (peaks): suspected to be the casing itself and unknown filler.

Thermogravimetric analysis (TGA) is used to characterize sample volatility, as well as thermal stability and response.

Strengths
  • Exquisitely precise weight sensitivity – can detect sample mass changes < 0.1 ug
  • Only a few milligrams of material is needed due to high instrument sensitivity
  • Rapid and straightforward data collection
  • Minimal sample prep
Limitations
  • Not available for measurements with temperatures below ~ 25 °C
Base Prices
Technique Variants
Pricing Starts At
Action
Thermogravimetric Analysis (TGA)
$300 / Sample
Example Outputs
<p>TGA and derivative TGA curves of sodium tungstate sample analyzed at 10 °C/min from ambient temperature to 800 °C.</p>

TGA and derivative TGA curves of sodium tungstate sample analyzed at 10 °C/min from ambient temperature to 800 °C.

<p>TGA Curves used in failure analysis of polyamide nylon (PA) enclosures on terminal block plug, which thermally degraded and caused critical instrument failure. Plot shows two different volatilization temperatures (peaks): suspected to be the casing itself and unknown filler.</p>

TGA Curves used in failure analysis of polyamide nylon (PA) enclosures on terminal block plug, which thermally degraded and caused critical instrument failure. Plot shows two different volatilization temperatures (peaks): suspected to be the casing itself and unknown filler.

Instruments Used for TGA
TA Instruments SDT Q600

TA Instruments SDT Q600

  • Mass Sensitivity: 0.1 ug
  • Temperature Range: ambient to 1500 °C
  • Calorimetric Accuracy: ± 2% (based on metal standards)
  • Controlled Heating Rate (up to 1000 °C): 0.01 to 100 °C / min
  • Controlled Heating Rate (up to 1500 °C): 0.01 to 25 °C / min

View Instrument Spec Sheet

Sample Requirements
  • Solids, powders, and semisolids accepted
  • Maximum Sample Mass: ~ 0.5 g
  • Pan Options:
    1. Platinum (40 μL or 110 μL volume options)
    2. Ceramic Cup (40 μL or 90 μL volume options)
  • Flat-faced sample or powders are preferred: measurement quality depends on contact uniformity between sample and pan
How TGA Works

When a sample reaches high enough temperatures, it undergoes chemical and physical transitions that affect its sediment mass.

A TGA system measures the minute changes in sample weight in a controlled thermal environment – usually, as heat is applied to the system. Alternatively, constant temperature experiments can be conducted to evaluate a material’s thermal stability over a set time period.

TGA instruments plot weight as a function of temperature and/or time, and analyzing these plots reveals several thermal properties of the material, including (but not limited to): thermal stability, heat resistance, volatility, and vaporization temperatures.

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