Baddeleyite refractories

Karaulov, A. G.; Sudarkina, T. E.; Gul'ko, N. V.

doi:10.1007/bf01284280

Refractories

1978

DOI: 10.1007/bf01284280

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Baddeleyite refractories

A. G. Karaulov

T. E. Sudarkina

N. V. Gul'ko

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1992

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“…The established [31] bonding properties in the ZrO2-rich region along the CaZrO 3-CaAI20 ~ line in the CaO--AI20~--ZrO 2 system made it possible to develop a zirconia-based concrete body containing a small quantity of AI20 a that is suitable for a service t~anperature 2000~ [17].…”

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“…In recent years, zirconia-based concrete bodies have been developed using new zirconium-containing binders belonging to the Al2Os--CaO-ZrO 2, Al2Os--SrO--Zr02~ and Al2Os--BaO-ZrO2 systems [16][17][18][19]. Numerous studies have been carried out on the high-temperature properties of the zirconia-based concrete bodies incorporating barium-aluminum zirconate, strontium-aluminum zirconate, and spinel-containing binders [20,26].…”

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Concrete bodies based on zirconium dioxide and a calcium-zirconate binder

Karaulov

1992

Refractories

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The linings made using concrete and ramming bodies have numerous merits over those obtained from fired refractories [1][2][3][4][5]: The laborious firing operation is eliminated; mechanization of the lining works and reduction of the cost of construction are possible; and monolithic linings having complex configurations can be obtained (it is usually difficult to make intricate linings using fired refractories). Besides this, in a number of cases, the thermal shock resistance of unfired linings is higher than that of the fired products obtained from the same materials [4,5]. This improvesthe reliability and the service life of the thermal units [3,6].The main specifications concerning refractory concretes and ramming bodies have been formulated in several publications [7][8][9][10]. Sufficient strength over the entire range of service temperatures and volume constancy are the main requirements to be met [7, 9, I0]. In order to ensure volume constancy of the unfired bodies, maintaining a large grain size of the filler (up to and above 5 mm) and incorporating 30-35%* minus 0.09mm fraction in the finely dispersed constituent of the body are recommended [7, 8, ii, 12]. According to published data [7], the shrinkage of the unfired bodies must not exceed 0.5-1.0% during their service.The mechanical strength of the ramming and the concrete bodies is improved by introducing mineralogical binders into them (cements, phosphate binders, argillaceous additives, liquid glass, bonding substances etc.). When using hydraulic binders, one observes loss of strength during dehydration of the cement; and, in a number of cases, the early development of a melt in the multicomponent systems decreases the service temperature of the binders [8,13,14].

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Concrete bodies based on zirconium dioxide and a calcium-zirconate binder

Karaulov

1992

Refractories

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Baddeleyite refractories

Cited by 1 publication

References 2 publications

Concrete bodies based on zirconium dioxide and a calcium-zirconate binder

Concrete bodies based on zirconium dioxide and a calcium-zirconate binder

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