Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Polymer materials suited for use as high temperature insulation

11.01.2006


Geopolymers with the potential for use as refractory castable



From the most technologically aware city dwellers to remote jungle tribes, almost the entire population of the earth know polymeric materials as plastics. Although some plastics are oven proof and can readily withstand high temperatures, they generally melt or burn at extreme temperatures.

Inorganic polymers are different and show promise for use in elevated temperature applications. Inorganic polymers made from aluminosilicates are termed geopolymers. They are amorphous to semi-crystalline and consist of two or three dimensional aluminosilicate networks, dependent on the composition. Geopolymers can be formed using a relatively low temperature processing techniques.


Physical behaviour of geopolymers are similar to those of Portland cement. Consequently, they have been considered as a possible improvement on conventional cements with respect to compressive strength, resistance to fire, heat and acidity, as well as a medium for the encapsulation of hazardous or low/intermediate level radioactive wastes. Although many applications have been speculated upon, their widespread use is restricted due to a lack of long term durability studies, detailed scientific understanding and lack of reproducibility of raw materials.

In this work published in AZojomo*, by Dan Perera and Rachael Trautman from Australian Nuclear Science and Technology Organisation (ANSTO), geopolymers are investigated for suitability as refractory coatings and as low temperature (1000°C) refractory castables.

The researchers found that geopolymers heated up to 1400°C did not show any major melting. The presence of two refractory phases, kalsilite and leucite, and an open porosity of ~38% at 1000°C, should make this material suitable as a refractory or heat insulation material for continuous use at this temperature.

Dr. Ian Birkby | EurekAlert!
Further information:
http://www.azonetwork.com
http://www.azom.com

More articles from Materials Sciences:

nachricht Novel sensors could enable smarter textiles
17.08.2018 | University of Delaware

nachricht Quantum material is promising 'ion conductor' for research, new technologies
17.08.2018 | Purdue University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>