Publication detail

Sintering of feldspar rocks from czech quarries

SOKOLÁŘ, R. VODOVÁ, L.

Original Title

Sintering of feldspar rocks from czech quarries

Type

journal article in Web of Science

Language

English

Original Abstract

Sintering behaviour as dependence of water absorption, flexural strength and firing shrinkage of dry pressed test samples made from three different types of feldspar rocks on the firing temperature (11201300° C) was determined. Potassium, potassiumsodium and sodium-calcium industrially milled feldspars with similar granulometry according to equivalent mean spherical diameter of the grains d(0.5) in the range of 16.620.8 ¯m were used. The sintering process was described according to changes in mineralogical composition of the fired test samples too. During the sintering process, feldspars gradually disappear in phasesfirst of all alkali feldspars (albite, microcline); anorthite (calcium feldspar) is more resistant to melting thanks to its higher melting temperature and it increases the sintering temperature of feldspar. Sodium-potassium feldspar Z43NaK50 with the lowest content of alkalis (3.35% of K2O and 2.67% of Na2O) and the highest equivalent mean spherical diameter d(0.5) showed the most intensive sintering activity. An explanation of this unexpected fact can be found in the equilibrium phase diagrams and in the formation of low melting eutectic mixtures.

Keywords

Feldspars, Sintering, Water absorption, Mineralogical composition

Authors

SOKOLÁŘ, R.; VODOVÁ, L.

RIV year

2015

Released

20. 1. 2015

Publisher

Ceramic Society of japan

Location

Japan

ISBN

1882-0743

Periodical

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN

Year of study

123

Number

1

State

Japan

Pages from

62

Pages to

67

Pages count

6

BibTex

@article{BUT117253,
  author="Radomír {Sokolář} and Lucie {Keršnerová}",
  title="Sintering of feldspar rocks from czech quarries",
  journal="JOURNAL OF THE CERAMIC SOCIETY OF JAPAN",
  year="2015",
  volume="123",
  number="1",
  pages="62--67",
  issn="1882-0743"
}