A brief update from the LIMES meeting in Sheffield (UK) in conjunction with the ESG 2016 conference and Centenary SGT conference
As the European Society of Glass Science & Technology (ESG) conference 2016 co-organized with the 100th anniversary of the Society of Glass Technology (SGT) started on Sunday evening the 4th of September, LIMES consortium held meetings during the day. The focus of the meeting was on recent results, dissemination, future work and what will happen after LIMES.

Based on the recent results we can now be comfortable to say that we have finished all milestones and deliverables relating to the glass composition and the properties related to that. However, for reactive gas strengthening, functional coatings and assembly of prototype we still have a bit to do. Therefore we focused some time to write a “to do” list so that we make sure that nothing is left in the lump when the LIMES project ends in March 2017.

The LIMES consortium generally thinks that the project has been a success and the necessary steps to come up with a proposal for the project LIMES 2.0 was discussed. In that project we need to move from a TRL level of 2-3/4-5 to 6-7.

One of the most interesting points on the” to do” list is to thermally strengthen the optimized LIMES composition. Furthermore are we now working on sol-gel coatings for self-cleaning and anti-reflective coatings, firsthand demonstrating anti-reflectivity using mesoporous silica coatings.

The strengthening work package has now shown that it is possible to approximately double the Al content in the glass surface by using reactive gas. Surface properties such as chemical resistance and scratch resistance will now be studied on these glasses.

The ESG 2016 and SGT100 conference was a very pleasant conference, dedicated to Prof. WES Turner, the first ever Prof. in Glass Technology and the founder of SGT as well as ICG (International Commission on Glass). More about Prof. WES Turner can be read here.

The LIMES consortium held three oral presentations:

1. The effects of do metal ion doping on the optical properties and structure of soda lime silica glasses for photovoltaic applications
B. L. Allsopp and P. A. Bingham

2. Increasing chemical resistance and improving mechanical properties of cover glass for PV modules
C. Stålhandske, K. Lundstedt, P. Sundberg and S. Karlsson


3. Use of reactive gases in the tempering process towards ultra-thin glasses for solar energy applications
P. Sundberg, J. Eriksson and S. Karlsson


Project poster from presentation at EUPVSEC in Munich, Germany, 20-24 June
A brief update from the LIMES meeting at SP in Borås, Sweden – 19th-20th of April 2016

A very fruitful meeting was held at SP in Borås where the status, the plan and the future of the LIMES project were discussed.

It is now roughly a year until the end of the project and there are still a lot of deliverables and milestone to be met. A plan for each one of them was made and it looks very promising even though our goals are very tough to reach.

Some further optimization of the “LIMES” composition has been made and small changes evidently affect properties to a relatively large extent. These small changes will now be verified by re-measuring some of the properties.

The toughening work package is now working on strengthening with reactive gases to inflict surface modifications during the thermal treatment. Initial results show that we have been able to modify the surface during the thermal strengthening process. Further tests will be made.

The functional coatings work package has moved into experimental work and has showed that randomly distributed nanostructures on the glass benefits the antireflective behavior. Next step is to quantify this with more samples and to study the wetting angle of these surfaces.

Solar Capture Technologies has in the assembly work package showed that it is possible to make PV modules with flat glasses produced in the laboratory and that these also show promising results.

The LIMES consortium will be presenting a Visual Poster at the EU PVSEC in Munich in June 2016. Furthermore will three oral presentations be given at the joint conference held in Sheffield, UK, 5th-9th of September 2016 – the 100th anniversary of the Society of Glass Technology and the 13th Conference of the European Society of Glass Science and Technology.

The LIMES team in one of Borås many sculptures.


A brief update from the LIMES meeting at Solar Capture Technologies in Blyth, UK – 14th-15th of October 2015
The project has now come half way and an intense spring 2015 is now followed by an even more intense autumn. There are more deadlines with regards to deliverables and milestones coming up. During the meeting, the previous work, future work and upcoming deadlines were presented and discussed.

The project has now suggested individual property optimizations and compositions for each individual work package, the project now moves towards bringing these compositions together into a single composition where all properties are enhanced.

One of the work packages is focused towards toughening in lab-scale experiments. The furnace design is complete and the initial results prove that it is possible to toughen similarly to commercial glasses. The toughening experiments now move onto the next step.

Another work package is focused on functional coatings in order to increase transmission and experimental as well as theoretical work on novel functional coatings has started.
A recent deliverable on standardization related to PV modules gives the consortium a good insight into the demands of PV modules. With regards to the assembly process of PV modules, different encapsulation materials and also different glasses have been assembled in Solar Capture Technologies’ laboratory. Next step is to make PV modules with LIMES produced cover glasses.

The upcoming meeting of the LIMES partners will be held at SP - the Technical Research Institute of Sweden in Borås, Sweden. The LIMES consortium are also able to announce that the following meeting will be held in conjunction with the joint event –the 100th anniversary of the Society of Glass Technology and the 13th Conference of the European Society of Glass Science and Technology. The conference will be held in Sheffield, UK, 4th-8th of September 2016.

From left: Ben Allsopp (Sheffield Hallam University), Paul Bingham (do), Alex Savidis (Solar Capture Technologies), Ian Baistow (do), Sarah Dunnill (do), Stefan Karlsson (Glafo), Christina Stålhandske (do) and Anne Andersson (SP).


Update May 6-7, 2015

Deliverable successfully passed, completion of design and demonstration of thermal strengthening in laboratory scale.

A brief update from the LIMES meeting at Johnson Matthey Technology Centre in Reading, UK – 1st-2nd of December 2014

The project has so far been working on melt procedure optimization and sample preparation. In parallel, optimization of the glass composition for use in photovoltaic modules has started. Design of Experiment (DoE) is used to plan and evaluate composition-property matrixes. In addition to this, characterizations were discussed.

Various techniques are available within the consortium; Glafo is for instance installing a new nano/microindenter with scratch test possibilities in January 2015 that will be used for characterization of mechanical properties of the investigated glass compositions within the project.

The project is also working on the design of a toughening furnace for lab-scale experiments on toughening of glass. The LIMES project is now in full swing and the next meeting will be held in May-June 2015 at CSIC in Madrid, Spain.






Glafo, Stefan Karlsson, LIMES, PG Vejdes väg 15, SE-351 96 Växjö, Sweden, Phone +46 10 516 63 57, E-mail stefan.karlsson@glafo.se