The purpose of this work was to investigate, whether silica extracted from olivine can be used as a low-cost coating pigment of ink-jet paper. Using nitric acid, amorphous silica was produced from olivine. The silica was washed, dried, milled and treated in an ultrasonic bath to attain a particle size suitable for paper coating (<10 µm). The yield of silica was approximately 35 %. Coating colours were prepared from the silica and applied to paper. The performance of the coating was analysed and compared to that of commercial silica pigments and test printings were performed. The silica coating produced from olivine performed well in comparison to that of the other silica coatings tested, except for the brightness, which was slightly lower than that of the reference silica coatings. This was apparently due to a small iron content (0.2 wt-%) in the silica produced from olivine. Nonetheless, the study shows that it is possible to produce silica pigments from olivine that has a potential to be used in matt coating ink-jet papers. However, more work on process development is needed to improve the brightness and yield of the silica as well as lower the particle size further to improve the properties of the coating.
|Publication status||Published - 2013|
|MoE publication type||Not Eligible|
|Event||4th International Conference on Accelerated Carbonation for Environmental and Materials Engineering, ACEME 2013 - Leuven, Belgium|
Duration: 9 Apr 2013 → 12 Apr 2013
|Conference||4th International Conference on Accelerated Carbonation for Environmental and Materials Engineering, ACEME 2013|
|Abbreviated title||ACEME 2013|
|Period||9/04/13 → 12/04/13|
- nitric acid
Teir, S., Bacher, J., Kenttä, E., & Sarlin, J. (2013). Silica produced from olivine for inkjet paper coating. 349-356. Paper presented at 4th International Conference on Accelerated Carbonation for Environmental and Materials Engineering, ACEME 2013, Leuven, Belgium.