#TITLE_ALTERNATIVE#

• Main Author: ASTRILIA (NIM : 13707048); Dosen Pembimbing : Dr. Ir. Aditianto Ramelan, SHEIFVA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17214
• Institution: Institut Teknologi Bandung

Particle orientation was introduced to a plastic mass in plate production during extrusion. The plastic mass was then shaped into a plate by roller head process and will produce a gradation in clay particle orientation. The gradation will lead into a differential shrinkage that caused the product to warp. Oriented particle will influence XRD intensity pattern that will result a misinterpretation on quantitative analysis. This observation is carried out to study the particle orientation effect on XRD diffractogram and the firing shrinkage on a kaolinite based ceramic. <br /> <br /> <br /> <br /> <br /> The specimens were made by extrusion process. The raw material is Sukabumi’s clay consist 24% of kaolinite. The extrusion was carried out by using 2 types of die entrance angle that were 20o and 45o. The green ceramic were then <br /> <br /> <br /> <br /> <br /> characterized by XRD to observe the difference between both diffractograms especially the basal plane intensity (001). The effects of die angle on specimen shrinkage were also studied by observing the firing shrinkage curves on the length, width and thickness direction. <br /> <br /> <br /> <br /> <br /> From the observation it was found that the higher die entrance angle the higher the particle orientation. This is shown by the XRD diffractogram that the increase of basal plane intensity is proportional to die entrance angle. The <br /> <br /> <br /> <br /> <br /> diffractogram of the extruded specimen were then compared with dried clay powder. <br /> <br /> <br /> <br /> <br /> From the I020/I001 calculation of dried clay powder, 20o and 45o extruded specimen were 0.52, 0.08 and 0.05 respectively. The smaller the ratio of I020/I001 the higher <br /> <br /> <br /> <br /> <br /> particle orientation occurred. Further study should be undertaken for observing the effect of particle orientation for fired specimen up to 1150o C.