List for the tag keyword: ceramic
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 [...]
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
( in English, en Français )
The results obtained with LTGS [...]
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. [...]
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) [...]
Paper by Dan S Perera and Rachael L Trautman from the Australian Nuclear Science and Technology Organisation (ANSTO)
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 mineral chemistry.
Since the [...]
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 report
In addition, we [...]
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 Cement. The [...]
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 [...]
The atomic ratio Si:Al in the poly(sialate) structure determines the properties and application fields. A low ratio Si:Al (1,2,3) initiates a 3D-Network that is very rigid. A high ratio Si:Al, higher than 15, provides polymeric character to the geopolymeric material. One third of Davidovits’ book, GEOPOLYMER Chemistry & Applications, is dedicated to applications. See the [...]