ceramic
25.000 years old : a geopolymer ceramic ?
The oldest ceramic ever manufactured, the Venus of Dolni Vestonice, is displayed at the Anthropology Museum, at Brno, Czech Republic. The Venus of Dolni Vestonice was visited by Prof. Joseph Davidovits who writes: ” I still had for my eyes the image of the yellow limestone Venus displayed at the Vienna Museum, Austria, to be [...]
The making of brown-black ceramics with LTGS in prehistory and antiquity
At the 1980, 1981, 1982, and 1984 Symposia on Archaeometry, Joseph Davidovits showed the possibility of fabricating ceramics by Low Temperature Geopolymeric Setting between 50°C and 500°C. The results obtained with LTGS have been surprising and very interesting from the archaeological point of view, e.g. the fabrication of ceramic whose surface is covered by an [...]
#H: the making of black-brown Etruscan ceramic, LTGS analogue
Geopolymer ‘99, 2nd Int. Conf. on Geopolymers The making of Etruscan ceramic (Bucchero Nero) in VII-VIII century B.C. (Fabrication de céramique Étrusque (Bucchero Nero) au VII-VIII siècle av. J.-C.) by Frédéric Davidovits (1), Alessandro Nasso (2), Joseph Davidovits (3) (1) Université de Caen, France (2) Universita di Udine, Italy (3) Geopolymer Institute, Saint-Quentin, France ( [...]
EM image of vitrified geopolymer
The geopolymer group at University of Illinois, Prof. W. Kriven, participated to the Center for Microanalysis of Materials (CMM) image contest with an image titled: 10. Vitrification of 3SiO2:Al2O3:K2O:10H2O geopolymer gel by heating to 1600°C. Crystallization of the glass systems was dendritic as seen by in micrograph of the top surface. Jonathan Bell, Kriven group. [...]
US Air Force satisfied with geopolymer developments
Report from the Air Force Research Laboratory on geopolymer research and developments report project number 9. AFRL is funding and conducting cutting-edge geopolymer research. Both intramural and extramural research has led to the development of new ceramics materials that possess superior properties, leading to more cost-effective choices in the design of future Air Force (AF) [...]
New paper from the geopolymer group at ANSTO, Australia
Paper by Dan S Perera and Rachael L Trautman from the Australian Nuclear Science and Technology Organisation (ANSTO)
Introduction: developments and applications in geopolymer
Materials for the Third Millennium Think Geopolymer and Geosynthesis! The last few years have seen spectacular technological progress in the development of geosynthesis and geopolymeric applications. New state-of-the-art materials designed with the help of geopolymerisation reactions are opening up new applications and procedures, and transforming ideas that have been taken for granted in inorganic and [...]
Ceramics for mold, tooling, high-tech
Mold, high-tech tooling for Carbon composites Aluminum superplastic Titanium Pechiney developed Geopolymer refractory materials for safe casting of corrosive aluminum/lithium (Al/Li) alloys in liquid state. Source: Pechiney patent Since 1986, the French aeronautic company Dassault Aviation is using geopolymer mold and tooling in the development of the Rafale fighter plane. source: Dassault Aviation public research [...]
Water reducing agent
Geopolymer combines the merits of cement and ceramics, we can make materials with the properties of ceramics by a process like cement. Water reducing agents are popular in cement industry. The question is what will happen in geopolymer? Experiences carried out with geopolymer cements show good results with regular water reducing agents used for Portland [...]
H2O, SiO2 and Al2O3 ratios
There is a clear relationship between water ratio and mechanical properties. The water is our carrier. Polycondensation happens between compounds that are soluble in water. It is the water content which determines the density of the matrix. After polycondensation, the excess of water which is not tied to the structure in the form of -OH [...]
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