Development of Machinable Glass-Ceramics Produced from Vermiculite

Abstract

In this study, machinable glass-ceramics were produced from vermiculite and K2CO3, SiO2, Al2O3 and MgF2 as additives by melting process. The starting materials were mixed together and milled in a mill with alumina ball for 2 h. The mixed powders were melted by aluminum crucible at 1500• C. The melted glass was cast into graphite mold, and then it was exposed to crystallization heat treatment for glass-ceramic transformation. The glass-ceramic samples were characterized with X-ray diffraction analysis, scanning electron microscopy, mechanical tests such as hardness, fracture toughness and machinability test. The results indicate that machinability properties can be obtained from vermiculite based glass-ceramic with some additives.

The Relationship Between Bending Strength and Porosity in Ceramic Brick That Contains Vermiculite

“…The Pananalytical X'Pert High Score program was used to determine the phases of the XRD patterns. Onen et al (2017), Spirina & Flerova (1975), Silva Jr et al (2014. The Pearson correlation coefficient was employed for correlation analyses, and subsequently, a t-test was conducted to assess whether the correlation coefficient significantly deviated from zero.…”

“…Research findings suggest that vermiculite holds promise as a building material and can serve as an aggregate in lightweight concrete and plaster due to its exceptional thermal, fire, and sound insulation properties. Notably, vermiculite exhibits low specific gravity, high flame and heat resistance, and a significant ion exchange capacity, rendering it valuable in various sectors including construction, agriculture, animal husbandry, and wastewater treatment Onen et al (2017), Spirina & Flerova (1975), Suvorov & Skurikhin (2002), Silva Jr et al (2014. Vermiculite's potential use as a building material is a possibility given the studies' results.…”

Investigation Of The Effect Of Vermiculite (Yıldızeli/Sivas) Addition On The Properties Of Sanitaryware Ceramic

“…Due to its outstanding thermal, fire and sound insulation qualities, it may also be utilized as an aggregate in lightweight concrete and plaster. According to Ngayakamo and Park (2009), Kalalani vermiculite may be used to make high-strength porcelain insulators as a raw material (Spirina and Flerova, 1975;Suvorov and Skurikhin, 2002;Rashad, 2016;Önen et al, 2017;Ngayakamo and Park, 2019;Tapik et al, 2019).…”