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2020 Vol.30, Issue 10 Preview Page
Influence of Flowability of Ceramic Tile Granule Powders on Sintering Behavior of Relief Ceramic Tile

과립분말 유동성 변화가 부조세라믹타일의 소결거동에 미치는 영향

Cheol Shin
,
Jung-Hoon Choi
,
Jung-Hun Kim
,
Kwang-Taek Hwang
,
Jin-Ho Kim†
신 철
,
최 정훈
,
김 정헌
,
황 광택
,
김 진호†
Icheon Branch, Korea Institute of Ceramic Engineering and Technology, Icheon 17303, Republic of Korea
한국세라믹기술원 이천분원
†Corresponding author E-Mail : jino.kim@kicet.re.kr (J.-H. Kim, KICET)
October 2020. pp. 550-557
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Abstract

Used in the ceramic tile market as a representative building material, relief ceramic tile is showing increased demand recently. Since ceramic tiles are manufactured through a sintering process at over 1,000 °C after uniaxial compression molding by loading granule powders into a mold, it is very important to secure the flowability of granular powders in a mold having a relief pattern. In this study, kaolin, silica, and feldspar are used as starting materials to prepare granule powders by a spray dryer process; the surface of the granule powders is subject to hydrophobic treatment with various concentrations of stearic acid. The effect on the flowability of the granular powder according to the change of stearic acid concentration is confirmed by measuring the angle of repose, tap density, and compressibility, and the occurrence of cracks in the green body produced in the mold with the relief pattern is observed. Then, the green body is sintered by a fast firing process, and the water absorption, flexural strength, and durability are evaluated. The surface treatment of the granule powders with stearic acid improves the flowability of the granule powders, leading to a dense microstructure of the sintered body. Finally, the hydrophobic treatment of the granule powders makes it possible to manufacture relief ceramic tiles having a flexural strength of 292 N/cm, a water absorption of 0.91 %, and excellent mechanical durability

Keywords
relief ceramic tile
flowability
granule powders
stearic acid
hydrophobic coating
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 30
  • No :10
  • Pages :550-557
  • Received Date : 2020-09-03
  • Revised Date : 2020-09-24
  • Accepted Date : 2020-09-24
  • DOI :https://doi.org/10.3740/MRSK.2020.30.10.550
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