Chemical Resistance of Ceramic Materials in Acids and Alkalis

Krasnyi, B. L.; Тарасовский, В. П.; Rakhmanova, E. V.; Bondar, V. V.

doi:10.1023/b:glac.0000048706.05368.71

Cited by 17 publications

(16 citation statements)

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“…The data obtained correlate well with the results obtained in [7]. Of course, the fact that the open porosity is different must be taken into account.…”

Section: Properties Of Porous Permeable Ceramic Based On Monofractionsupporting

confidence: 86%

Properties of porous permeable ceramic based on monofractional corundum powders and nanodispersed binder

Krasnyi¹,

Тарасовский²,

Krasnyi³

et al. 2009

Glass Ceram

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It is concluded on the basis of calculations performed for different types of close packing of spherical particles that porous permeable ceramic materials with open porosity greater than 42 ± 3% it is can be created, in practice, from monofractional corundum powder. It is shown that the formation method (semidry pressing and slip casting) and the habit of the crystals affect the open porosity of the ceramic. The chemical resistance of the porous ceramic materials obtained to nitric acid and sodium hydroxide is evaluated.The problem of doubling the gross domestic product is closely linked with solving problems of ecology and the conservation of nonrenewable resources. One of the primary paths for solving such problems could be developing new ceramic materials, organizing the production of diverse articles from them, and wide industrial application of these articles as replacements for obsolete conventionally used materials. Porous permeable ceramic is one such promising material [1].Articles made from such ceramic are finding increasing industrial applications including, among many other applications, removing water from hydrometallurgical pulps after flotation, blowing inert gas through metal melts to mix the gas, filtering ferrous and non-ferrous metal melts to remove impurities from them, removing dust and admixtures of harmful gases from hot exhaust stack gases, flotation, aeration, and ozonation of water systems in fine-bubble gas-distribution systems, pneumatic transport and mixing of pulverized materials and highly dispersed powders, removing radioactive impurities from hot stack gases, removing solid impurities from solutions of metal electrolytes, and removing solid impurities from water in water recycling systems [2].The interest in articles made of porous permeable ceramic based on aluminum oxide is dictated by a special combination of properties which are inherent only to this material -high resistance to acid and alkali, high operating temperature, high heat resistance, and high durability. Modern technologies make it possible to obtain porous permeable ceramic materials with prescribed pore size and distribution. Special technological methods make it possible to manufacture large-size and long articles with different configurations [3].The technology of manufacturing articles from porous permeable ceramic materials is based on the use of ceramic filler-powders with a mono-or narrow-fractional composition together with a binder (high-plasticity clays, liquid glass, bentonite, phosphates). For monofractional powders, the open porosity of the articles is almost independent of the grain size. However, the size of the pores formed in an article is mainly determined by the size of the filler particles as well as by the amount of binder introduced, the degree of compac-

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“…The data obtained correlate well with the results obtained in [7]. Of course, the fact that the open porosity is different must be taken into account.…”

Section: Properties Of Porous Permeable Ceramic Based On Monofractionsupporting

confidence: 86%

Properties of porous permeable ceramic based on monofractional corundum powders and nanodispersed binder

Krasnyi¹,

Тарасовский²,

Krasnyi³

et al. 2009

Glass Ceram

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“…Al 2 O 3 generally is of high chemical resistance [63], while it is slightly better in bases than in acids [56,64]. However, even in the temperature range between 240 • C and 500 • C the weight loss in phosphoric acid (H 3 PO 4 ) is reported to be small due to the formation of a protecting aluminum phosphate (AlPO 4 ) layer [65].…”

Section: Impact Of the Crystalline Grains On The Porosification Resultsmentioning

confidence: 99%

Wet chemical porosification of LTCC in phosphoric acid: Celsian forming tapes

Steinhäußer

Hradil

Schwarz

et al. 2015

Journal of the European Ceramic Society

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“…They can also be used as radi a tion shield ing for gamma rays. High melt ing temper a ture, high chem i cal re sis tance in acidic or caus tic en vi ron ments and high hard ness are some of the typ ical prop er ties of ce ram ics which make them es sen tial for our daily life style [7,8]. High melt ing tem per a ture, high heat re sis tance and high chem i cal re sis tance are the ad van tages of ce ram ics in com par i son with met als and make them suit able for us ing as ra di a tion shielding ma te rial in var i ous en vi ron ments and dif fer ent places, es pe cially when us ing met als is un suit able.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental determination of mass attenuation coefficients of lead-based ceramics and their comparison with simulation

Vejdani-Noghreiyan

Aliakbari

Ebrahimi-Khankook

et al. 2016

Nucl Technol Radiat Prot

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Mass at ten u a tion co ef fi cient of lead-based ce ram ics have been mea sured by ex per i men tal meth ods and com pared with the o ret i cal and Monte Carlo sim u la tion re sults. Lead-based ceram ics were pre pared us ing mixed ox ide method and the X-ray dif frac tion anal y sis was done to eval u ate the crys tal struc ture of the pro duced hand made ce ram ics.The ex per i men tal re sults show good agree ment with the o ret i cal and sim u la tion re sults. How ever at two gamma ray ener gies, small dif fer ences be tween ex per i men tal and the o ret i cal re sults have been ob served. By add ing other ad di tives to ce ram ics and ob serv ing the changes in the shield ing prop er ties such as flex i bil ity, one can syn the size and op ti mize ce ram ics as a neu tron shield. Key words: at ten u a tion co ef fi cient, CsI(Tl) de tec tor, lead-based ce ramic, MCNP-4CA. Vejdani-Noghreiyan, et al.: The o ret i cal and Ex per i men tal De ter mi na tion of .

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Chemical Resistance of Ceramic Materials in Acids and Alkalis

Cited by 17 publications

References 0 publications

Properties of porous permeable ceramic based on monofractional corundum powders and nanodispersed binder

Properties of porous permeable ceramic based on monofractional corundum powders and nanodispersed binder

Wet chemical porosification of LTCC in phosphoric acid: Celsian forming tapes

Theoretical and experimental determination of mass attenuation coefficients of lead-based ceramics and their comparison with simulation

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