derivatograph (Budapest, Hungary) at a heating rate of 10 °C min −1 in air, in the temperature range of 20–1,000 °C with the sample weight of 100 mg. As a reference α-Al2O3 was used. The initial decomposition temperature (IDT), T 20% , T 50% of weight
-50 thermal analyzer. The measurements were performed in dynamic nitrogen atmosphere at a heating rate of 10 °C min −1 , using approximately 10 mg powdered samples contained in a platinum crucible. α-Al2O3 is used as a reference material
20 °C/min) in a DSC (DSC-50, Shimadzu, Japan) from room temperature to 833 K in air. The DSC has a minimum detection sensitivity of 10 μW. The samples of the metallic glass (5–6 mg) under consideration and the reference material α-Al2O3 were
in the temperature range of 298–1473 K. The samples were placed in Pt crucibles and α -Al2O3 was used as the reference material. Measurements were performed by using a dynamic nitrogen furnace atmosphere with a flow rate of 50 mL min −1
min −1 ), 24 K h −1 (0.40 K min −1 ), and 30 K h −1 (0.50 K min −1 ). The sample used was about 10 mg, and the reference sample was α -Al2O3 . Each process was repeated three times, and the heat flow curves under the same conditions overlap with
hydrogenation depended on the Pd particle size, the support acidity, and the presence of other transition metals [ 5 – 8 ]. The performance of Pd/α-Al2O3 catalyst in the selective hydrogenation of 1,3-butadiene can also be further improved by the addition of
been performed in air, in the temperature range 20–500 °C, with a heating rate of 5 °C min −1 , using as reference α-Al2O3 .
The synthesized powders were characterized by FT-IR spectrometry with a Shimadzu Prestige FT-IR spectrometer, in
and the sample masses were in the range of 3–5 mg. Highly sintered α-Al2O3 was used as the reference material.
Results and discussion
Thermal analysis plays an important role in studying structure and stability
about 3 mm in height by hand press. Analysis was performed on α-Al2O3 sample holder, with a heating rate of 5 °C min −1 from 400 to 1000 °C under static air atmosphere. The changes of the samples during sintering were estimated by evaluating the