Alumina powders via a controlled precipitation of aluminum acetate

1989 ◽  
Vol 4 (4) ◽  
pp. 967-971 ◽  
Author(s):  
A. Ayral ◽  
J. C. Droguet
Keyword(s):  
Thermal Decomposition ◽  
Ir Spectroscopy ◽  
Chemical Reactions ◽  
Thermal Evolution ◽  
New Method ◽  
Alumina Powder ◽  
Alkoxide Precursor ◽  
Aluminum Acetate ◽  
Controlled Precipitation

A new method of producing alumina powder is described. Aluminum basic acetate is first synthesized from alkoxide precursor. The chemical reactions which control the precipitation of this salt are followed, using IR spectroscopy. Alumina powder is obtained by further thermal decomposition, and the thermal evolution of the precipitate is studied.

Alumina Powders from Aluminum Alkoxide.

1988 ◽  
Vol 121 ◽  
Author(s):  
A. Ayral ◽  
J. Phalippou ◽  
J. C. Droguet
Keyword(s):  
Thermal Decomposition ◽  
Ir Spectroscopy ◽  
Chemical Reactions ◽  
Alumina Powder ◽  
Aluminum Alkoxide ◽  
Controlled Precipitation

ABSTRACTA new way of producing alumina powder from the alkoxide is reported. Aluminum basic acetate is first synthesized by reactions which allow controlled precipitation. The chemical reactions are followed using IR spectroscopy. Alumina powder is obtained by subsequent thermal decomposition.

scholarly journals The thermal decomposition of fine-grained micrometeorites, observations from mid-IR spectroscopy

2017 ◽  
Vol 206 ◽  
pp. 112-136 ◽  
Author(s):  
Martin David Suttle ◽  
Matthew J. Genge ◽  
Luigi Folco ◽  
Sara S. Russell
Keyword(s):  
Thermal Decomposition ◽  
Ir Spectroscopy ◽  
Fine Grained

A New Method to Synthesize Nickel Carbide (Ni3C) Nanoparticles in Solution

2006 ◽  
Vol 6 (1) ◽  
pp. 221-226 ◽  
Author(s):  
Yonghua Leng ◽  
Huaiyu Shao ◽  
Yuntao Wang ◽  
Masaaki Suzuki ◽  
Xingguo Li
Keyword(s):  
Thermal Decomposition ◽  
Oleic Acid ◽  
Active Carbon ◽  
Room Temperature ◽  
Pure Nickel ◽  
New Method ◽  
Nickel Formate ◽  
Nickel Carbide ◽  
Oleyl Amine ◽  
Good Crystallinity

Pure nickel carbide (Ni3C) nanoparticles with particle diameters of 40 nm have been prepared by thermal decomposition of nickel formate in the presence of oleic acid and oleyl amine. The co-existence of active nickel and active carbon plays an important role in the formation of metastable Ni3C. Ni3C powder decomposes at 770 K in an N2 atmosphere to yield nickel and carbon. While in an H2 atmosphere, Ni3C powder is converted into Ni at 627 K. In addition, Ni3C nanoparticles exhibit superparamagnetism and are easier to magnetize at room temperature due to their good crystallinity and few defects.

scholarly journals Glass-Sensors: Assessment of Complex Corrosive Stresses in Conservation Research

1990 ◽  
Vol 185 ◽  
Author(s):  
Dieter R. Fuchs ◽  
Hannelore RÖmich ◽  
Helmut Schmidt
Keyword(s):  
Chemical Composition ◽  
Ir Spectroscopy ◽  
Environmental Stress ◽  
Silicate Glass ◽  
New Method ◽  
Stained Glass ◽  
Stress Situation ◽  
Conservation Research ◽  
Combined Impact

AbstractGlass sensors, based on K-Ca-silicate glass chips, with a low durability against corrosive stresses, offer a new method for assessing the complex environmental stress situation of monuments and pieces of art. The easy-tohandle technique is able to detect the combined impact of climatic stresses, pollution and microbiological effects as well as synergetic interactions.The chemical composition of the sensitive glasses enables judgements within few months. This way long-term estimates can be obtained without costly long-term investigations.The corrosion progress is determined by microscopy and IR-spectroscopy of the weathered glass sensor surfaces. The sensors are already operating in the field of stained glass window preservation. They monitor the efficiency of different kinds of external protective glazings and the remaining stresses from the in-door environment of cathedrals.

New method for preparation of specially pure glasses in the Ge–S–I system by melting the products of thermal decomposition of Ge2S3I2

2015 ◽  
Vol 429 ◽  
pp. 178-182 ◽  
Author(s):  
А.P. Velmuzhov ◽  
М.V. Sukhanov ◽  
А.D. Plekhovich ◽  
А.I. Suchkov ◽  
А.М. Potapov ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
New Method
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