Thermogravimetric investigation on the interaction of formic acid with solder joint materials

2016 ◽  
Vol 40 (12) ◽  
pp. 10482-10487 ◽  
Author(s):  
Fosca Conti ◽  
Alexander Hanss ◽  
Carolin Fischer ◽  
Gordon Elger
Keyword(s):  
Solder Joint ◽  
Formic Acid ◽  
Reaction Mechanisms ◽  
Temperature Range ◽  
Cu Alloy ◽  
Thermogravimetric Investigation

Reaction mechanisms of gaseous formic acid with oxidized Cu and Sn–Ag–Cu alloy (SAC305) are investigated in the temperature range of soldering (40–260 °C).

Catalysis and reaction mechanisms of N-formylation of amines using Fe(III)-exchanged sepiolite

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Bilge Eren ◽  
Reyhan Aydin ◽  
Erdal Eren
Keyword(s):  
Ir Spectroscopy ◽  
Formic Acid ◽  
Thermal Desorption ◽  
Lewis Acid ◽  
Reaction Mechanisms ◽  
Adsorption Mechanism ◽  
Catalytic Properties ◽  
Temperature Range ◽  
High Yields

AbstractThis study presents a rapid, economical and “green” N-formylation of anilines with formic acid (FA) using Fe(III)-exchanged sepiolite (IES) as a catalyst. The IES exhibited excellent catalytic properties and the reactions were complete within 20.90 min to afford products with high yields. The adsorption mechanism of FA on the IES sample was studied by infrared (IR) spectroscopy at a temperature range of 120–400°C. The thermal desorption of pyridine was detected by the IR technique to estimate the acidity of IES. Lewis acid-bound pyridine bands at 1618–1631 cm-1 and 1443–1445 cm-1 were observed even after the IES sample was heated above 400°C.

Basic Chromium(III) Formate: Reaction of Chromiiim(III) Chloride with Formic Acid

1979 ◽  
Vol 34 (2) ◽  
pp. 160-162 ◽  
Author(s):  
R. C. Paul ◽  
P. Kapoor ◽  
. B. Baidya ◽  
R. Kapoor
Keyword(s):  
Formic Acid ◽  
Spectral Data ◽  
Magnetic Moment ◽  
Title Compound ◽  
Temperature Range ◽  
Infrared Spectral ◽  
Anhydrous Formic Acid

Abstract Chromium(III) Chloride, Basic Chromium(III) Formate, IR, Thermogravimetry, Magnetic Moment Chromium(III) chloride reacts with anhydrous formic acid to give basic chromium(III) formate [Cr3O(OOCH)6(H2O)2(HCOOH)](OOCH), HCOOH. Its reactions with bases (B) give compounds of the general composition [Cr30(C00CH)6(B)3](00CH). The title compound has been characterized by infrared spectral data, temperature range (266-110K) magnetic moment and thermogravimetry.

Microscopic Reaction Mechanisms of Formic Acid Generated During Pyrolysis of Cellulosic Insulating Paper

2021 ◽  
Vol 28 (5) ◽  
pp. 1661-1668
Author(s):  
Hanbo Zheng ◽  
Enchen Yang ◽  
Xufan Li ◽  
Chenvao Liu ◽  
Zijian Wang ◽  
...  
Keyword(s):  
Formic Acid ◽  
Reaction Mechanisms ◽  
Insulating Paper ◽  
Microscopic Reaction

Thermal polymerization of arylacetylenes: spectroscopic and thermal studies

1994 ◽  
Vol 6 (4) ◽  
pp. 347-383 ◽  
Author(s):  
Marie-Florence Grenier-Loustalot
Keyword(s):  
Thermal Properties ◽  
Reaction Mechanisms ◽  
Thermal Studies ◽  
Thermal Polymerization ◽  
Temperature Range ◽  
H Nmr ◽  
Kinetics Of ◽  
Competing Reactions

The reaction mechanisms and kinetics of endcapped ethynyl polyethers were studies in the temperature range 150-220C. The results obtained by '3C and 'H NMR, FrTIR, HPLC and DSC indicate reactivity differences and competing reactions. These materials were cured and their thermal properties evaluated.

Formation Mechanism of SrBi2Nb2O9 Prepared by Melting Salt Method

2010 ◽  
Vol 177 ◽  
pp. 12-15
Author(s):  
Bao Rang Li ◽  
Xing Tao Liu ◽  
Yang Sheng Zheng ◽  
Hui Bin Chang
Keyword(s):  
Molten Salt ◽  
Formation Mechanism ◽  
Reaction Mechanisms ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
Synthesis Reaction ◽  
Simple Route ◽  
Temperature Range ◽  
Synthesis Route ◽  
Molten Medium

In this paper SrBi2Nb2O9 was prepared by molten salt synthesis method and KCl chosen as molten medium. In order to disclose possible formation mechanism of SrBi2Nb2O9, a simple route was established for comparison by dividing the starting precursors into four groups. With the help of XRD, possible synthesis route was analyzed. The results showed that pure SrBi2Nb2O9 powders could be obtained at temperature higher than 700oC by molten salt synthesis. Intense synthesis reaction happened in the temperature range from 500 to 700oC. The reaction mechanisms of SrBi2Nb2O9 included four steps, namely the formation of 1) SrBi2O4 at close to 600oC,2) BiNbO4 from the reaction of at 600-700 oC, 3) SrBi2Nb2O9 from the reaction of SrBi2O4 and Nb2O5 and 4)SrBi2Nb2O9 from the reaction of BiNbO4 and SrCO3. The molten salt could improve distribution and reactivity of the precursors and significant formation of SrBi2Nb2O9.

Electron Optical Study of the Thermal Decomposition of Kaolinite

Clay Minerals ◽  
1970 ◽  
Vol 8 (3) ◽  
pp. 279-290 ◽  
Author(s):  
J. D. C. McConnell ◽  
S. G. Fleet
Keyword(s):  
Thermal Decomposition ◽  
Reaction Mechanisms ◽  
Spinel Phase ◽  
Oxide Phase ◽  
Secondary Development ◽  
Main Reaction ◽  
Optical Study ◽  
Limited Extent ◽  
Microporous Structure ◽  
Temperature Range

AbstractThe electron microscope has been used to study the mechanisms of thermal decomposition of kaolinite in the temperature range 800-1350°C. Three main reaction mechanisms appear to be important in this temperature range. At 850°C metakaolinite breaks down to produce an amorphous defect oxide phase which is homogeneous and finely porous. When heated at 900°C the reaction product is a defect spinel with strongly preferred orientation and microporous structure. This defect spinel phase is observed in the temperature range 900-1150°C and shows little change in microstructure throughout this temperature range where the secondary development of muUite also occurs to a limited extent. Above 1150°C mullite develops in quantity and appears to represent the bulk of the reaction product at 1200°C.

Preparation of YBa2Cu3O6+x by a formic acid method

1990 ◽  
Vol 5 (7) ◽  
pp. 1388-1391 ◽  
Author(s):  
J. C. Otamiri ◽  
A. Andersson
Keyword(s):  
Formic Acid ◽  
Acid Solutions ◽  
Dilute Solutions ◽  
Short Intervals ◽  
Temperature Range ◽  
Sintering Time ◽  
Acid Method ◽  
Higher Temperature ◽  
Lower Temperature

Synthesis of YBa2Cu3O6+x from formic acid solutions of stoichiometric amounts of the initial materials has been investigated in the temperature range 750–950°C. The reaction is strongly influenced by the concentration of formic acid. Dilute solutions favor synthesis of purer samples under moderate conditions of temperature and sintering time. At lower temperature the same effect can be achieved if sintering time is longer, while at higher temperature, multiple grinding and heating at very short intervals are necessary to avoid formation of Y2BaCuO5. The observed effect of HCOOH concentration is explained by the different mechanisms involved in the decomposition of the formates obtained.

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