Year 2020, Volume , Issue 20, Pages 233 - 247 2020-12-31

The Relationship between the Flow Properties of Clay Slurry Samples and the Properties of Ceramic Green/Sintered Products
The Relationship between the Flow Properties of Clay Slurry Samples and the Properties of Ceramic Green/Sintered Products

Sedef DIKMEN [1] , Tuğba MUCUR [2] , Zeyni ARSOY [3] , Bahri ERSOY [4]


This study investigated the effects of various dispersants (Dolapix PC-67, Dolapix SPC 7, Darvan CN, Darvan A821 and Na2SiO3) on the flow properties of slurry prepared using ESC-3 clay to find the optimum dispersant type and dispersant dosage to produce the required properties in green and sintered products produced by slip casting. By considering the flow curves of slurry, it was determined that the most suitable dispersant was Dolapix PC-67 and the dosage was ~0.1%. Afterwards, slurry was prepared in bar-shaped samples keeping the same experimental conditions and using Dolapix PC-67 dosages of 0, 0.03, 0.1 and 1.0 wt. %. The resulting green body samples were dried and sintered at 1200°C. Some physico-mechanical tests were applied to both the green and sintered samples, as well as investigating their microstructure, crystallinity and secondary phase formations using SEM and XRD. Some of the results obtained were as follows: (i) adding dispersant to the slurry had a positive effect on the physical and mechanical properties of the green and sintered products obtained by slip casting. (ii) Determination of the optimum dispersant dosage used in the ceramic slurry by slip casting is an important factor. When the properties of the green/final products and their flow curves measured by Ford cup were considered, it can be said that the dispersant dosage at which the shortest flow duration was obtained did not always correspond to the best results for the physico-mechanical properties of green/final products. (iii) The relationship between the green and sintered samples prepared from slip casting using different dispersant dosages, and the flow curves of these slips, could not be observed from their SEM images.
This study investigated the effects of various dispersants (Dolapix PC-67, Dolapix SPC 7, Darvan CN, Darvan A821 and Na2SiO3) on the flow properties of slurry prepared using ESC-3 clay to find the optimum dispersant type and dispersant dosage to produce the required properties in green and sintered products produced by slip casting. By considering the flow curves of slurry, it was determined that the most suitable dispersant was Dolapix PC-67 and the dosage was ~0.1%. Afterwards, slurry was prepared in bar-shaped samples keeping the same experimental conditions and using Dolapix PC-67 dosages of 0, 0.03, 0.1 and 1.0 wt. %. The resulting green body samples were dried and sintered at 1200°C. Some physico-mechanical tests were applied to both the green and sintered samples, as well as investigating their microstructure, crystallinity and secondary phase formations using SEM and XRD. Some of the results obtained were as follows: (i) adding dispersant to the slurry had a positive effect on the physical and mechanical properties of the green and sintered products obtained by slip casting. (ii) Determination of the optimum dispersant dosage used in the ceramic slurry by slip casting is an important factor. When the properties of the green/final products and their flow curves measured by Ford cup were considered, it can be said that the dispersant dosage at which the shortest flow duration was obtained did not always correspond to the best results for the physico-mechanical properties of green/final products. (iii) The relationship between the green and sintered samples prepared from slip casting using different dispersant dosages, and the flow curves of these slips, could not be observed from their SEM images.
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Primary Language en
Subjects Engineering
Journal Section Articles
Authors

Orcid: 0000-0002-6164-4710
Author: Sedef DIKMEN (Primary Author)
Institution: FEN FAKÜLTESİ
Country: Turkey


Orcid: 0000-0000-0000-0000
Author: Tuğba MUCUR
Institution: Ankara Seramik A.Ş.
Country: Turkey


Orcid: 0000-0000-0000-0000
Author: Zeyni ARSOY
Institution: FACULTY OF ENGINEERING
Country: Turkey


Orcid: 0000-0002-0075-9039
Author: Bahri ERSOY
Institution: FACULTY OF ENGINEERING
Country: Turkey


Dates

Publication Date : December 31, 2020

APA Dıkmen, S , Mucur, T , Arsoy, Z , Ersoy, B . (2020). The Relationship between the Flow Properties of Clay Slurry Samples and the Properties of Ceramic Green/Sintered Products . Avrupa Bilim ve Teknoloji Dergisi , (20) , 233-247 . DOI: 10.31590/ejosat.752832