Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

Abstract

Plered region is located in around Purwakarta area, west java, Indonesia. Plered is famous as ceramic product especially ceramic tiles, decorative ceramics, tableware and roof tiles. This paper investigated the manufacturing of porous ceramic from Plered and evaluated the mechanical properties especially bending strength. The investigation include the controlling of porosity using pore former during manufacturing, investigation of chemical composition and evaluated the fracture strength using bending test. Evaluation of porosity ceramic product use an archimedes method and scanning electron microscopy and the bending strength of porous ceramic using three point bending test. The porous ceramic was tailored by using compaction process and sintering process at temperature of 1250 C, the pore former (rice starch) was added on the material ceramic to control of porosity. The bending strength use standard ASTM C1161-13 which sample has cross section of 6x8 mm2 and 90 mm long. The results show that the porosity increases with the number of pore formers in a mixture of clay, the porosity of sinter ceramic was 7 vol%,12 vol%, 17 vol% at using pore former 5 wt%, 15 wt% and 25 wt % respectively. The bending strength of sinter ceramic was declined with increasing porosity. The bending strength of sintered ceramic was 58 MPa, 49.5 MPa and 34.7 MPa at porosity of 7 vol%, 9 vol% and 14 vol% respectively.

Natural Ball Clay Ceramic Membrane Fabrication Using Full Factorial Design for Screening

“…Large macroporous voids are produced when the percentage of sawdust used becomes larger. Adding sawdust to the substrate can increase the membrane porosity value [42]. The particle size of the added sawdust is also one of the most crucial parameters in the fabrication of ceramic membranes as it influences the formation of the porous structure.…”

Dampak Proses Sintering Material Keramik pada Sifat Mekanik dan Dimensi Suatu Produk

“…Pengontrolan porositas biasanya ditambahkan pore former (pembentuk pori). Material pembentuk pori untuk bahan tanah liat dapat dipakai tepung beras atau tepung beras [8]. Pada proses selanjutnya tepung beras terurai dan hilang meninggalkan pori (void) terbentuk secara random.…”

“…Grafik hubungan tegangan patah dan jumlah pore former yang ditambahkan dalam tanah liat setelah proses sintering pada suhu 1250 C. Semakin banyak pembentuk pori yang ditambahkan, tegangan patah mengalami penurunan. Kondisi ini berkait dengan pembentuk pori meningkat pada produk sinter maka nilai porositas pada tanah liat sinter nilainya meningkat [8].…”

“…Pada Tabel 1untuk penambahan pembentuk pori tepung beras sebesar 5 %, 15 % dan 25 % berat maka penyusutannya pada bentuk piringan adalah sebesar 18 %, 25 % dan 27 %, sedangkan untuk bentuk silinder yang dibentuk dengan semi slurry maka pada proses pengeringan (drying) pada suhu sebesar 105 C, penyusutan ukuran tinggi silinder sebesar 14,3 %, kemudian dilanjutkan pada proses sintering mengalami penyusutan sebesar 6,7 %. Pada proses pengeringan bentuk silinder pada suhu 105 C sudah mampu menguapkan air sehingga rongga yang terisi air kosong membentuk pori dan ada atom atom yang berdifusi sehingga ukurannya menyusut [8,10]. Pada proses sintering selanjutnya binder yang masih ada di dalam produk silinder belum dapat menguap pada suhu 105 C. Binder PVA (polyvinil alcohol) mendidih pada suhu 228 C [15] sehingga pada suhu sintering 950 C mampu menghilangkan PVA.…”

Influence of a powder-forming additive on the physical-mechanical properties and structure of a ceramic material

“…These raw materials are of great interest to the porous ceramics industry, primarily due to their diverse mineralogical composition. It allows for ceramic lightness, porosity control and sintering ability during heat treatment [4,[20][21][22].…”