Influence research of temperature heat treatment on the microstructure of alumina ceramics

  • V. V. Martynenko JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
  • Р. O. Kushchenko JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
  • K. I. Kushchenko JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
  • Yu. O. Krakhmal JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
  • E. L. Karjakina JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
  • Yu. Ye. Mishnyova JSC "URIR named after A. S. Berezhnoy", Kharkov, Ukraine
Keywords: alumina ceramics, slip casting, reactive alumina, heat treatment, microstructure.

Abstract

The JSC "URIR named after A. S. Berezhnoy" developed and introduced the technology of highly refractory alumina extra-dense ceramics. It is known that, the structure and properties of alumina ceramics in many cases depend on the temperature of its heat treatment, the holding time at the final temperature, the thermal unit, and a number of other factors. In order to study the processes of structure formation during of heat treatment the microstructure of alumina ceramic samples of two compositions (composition 1 with a moisture content of 30 %, as well as with dispersing and hardening additives, and composition 2 with a moisture content of 20 % only with dispersing additive) which were made by slip casting aqueous alumina slips based on reactive alumina α–from with Al2O3 content over 99 %, specific surface ~ 9 m2/g by electron microscopic analysis was studied. It was established that, after heat treatment at 1000 °C the beginning of sintering and recrystallization of corundum grains are observed, after heat treatment at 1200 °C take place packing of structure and recrystallization of α–Al2O3. After firing at 1400 °C the microstructure of samples composition 1 is represented to a large extent by crystals of tabular corundum with a particle size ~ 0.5—5.5 μm, predominant — ~ 2.5—3.0 μm. After firing at 1400 °C the microstructure of samples composition 2 is represented — by individual particles of a rounded and oval form with a size of ~ 0.5—3.5 μm, predominant — ~ 1.5—2.0 μm which are interconnected by intercrystalline layers. The microstructure of alumina ceramic samples of both compositions after firing at 1500 °C is similar and is composed of recrystallized corundum grains with a size of ~ 0.5—5.5 μm, predominant — ~ 1.5—2.0 μm, among which there are also larger α–Al2O3 grains, with a size of ~ 2—8 μm. After firing at 1580 °C the microstructure of samples is represented by a dense fine-grained structure of well-formed practically defect-free corundum grains, with a size of ~ 0.5—3.0 μm, among which grains of ~ 5—10 μm.

References

Кайнарский И. С., Дегтярева Э. В., Орлова И. Г. Корундовые огнеупоры и керамика. Москва : Металлургия, 1981. 267 с.

Kajnarskij I. S., Degtjareva Je. V., Orlova I. G. Korundovye ogneupory i keramika [Corundum refractories and ceramics]. Moscow, Metallurgiya Publ. [Metallurgy], 1981. 267 p. (in Russian).

Корундовые огнеупоры и керамика / П. П. Криворучко и др. Научные исследования по технологии и службе огнеупоров. К 70-летиюУкраинского научно-исследовательского института огнеупоров. Харьков : Каравелла, 1997. С. 167—185.

Krivoruchko P. P., P'janyh N. L., Kabakova I. I., Girich N. A., Barannik Yu. P., Rabinkov L. G., Denisenko E. A. Korundovye ogneupory i keramika [Corundum refractories and ceramics]. Nauchnye issledovanija po tehnologii i sluzhbe ogneuporov. K 70-letiju Ukrainskogo nauchno-issledovatel'skogo instituta ogneuporov. [Scientific research on technology and service refractories. To the 70th anniversary of the Ukrainian Research Institute of Refractories]. Kharkov, Karavella Publ., 1997, pp. 167—185 (in Russian).

Разработка и производство корундовой керамики / П. П. Криворучко и др. Передовая керамика — третьему тысячелетию : тез. докл. междунар. науч. конф., г. Киев, 5—9 нояб. 2001 г. Киев : Украина, 2001. С. 149.

Krivoruchko P. P., P'janyh N. L., Girich N. A., Barannik Ju. P., Denisenko E. A., Svetlichnyj E. A. Razrabotka i proizvodstvo korundovoj keramiki [Development and production of corundum ceramics]. Peredovaja keramika — tret'emu tysjacheletiju. Tezisy dokladov mezhdunarodnoj nauchnoj konferencii, Kiev, 5—9 nojabrja 2001 [Advanced ceramics — the third millennium. Abstracts of Int. Sci. Conf, Kiev, 5—9 of November, 2001]. Kiev, Ukraina Publ., 2001, p. 149 (in Russian).

Корундовая керамика, разработанная и изготавливаемая ОАО «УкрНИИО имени А. С. Бережного» / П. П. Криворучко и др. Металлургическая и горнорудная промышленность. 2006. № 2. С. 65—69.

Krivoruchko P. P., P'janyh N. L., Denisenko E. A., Svetlichnyy E. A. Korundovaja keramika, razrabotannaja i izgotavlivaemaja OAO "UkrNIIO imeni A. S. Berezhnogo" [Corundum ceramics developed and manufactured by OJSC "The Ukrainian Research Institute of Refractories named after A. S. Berezhnoy"]. Metallurgicheskaja i gornorudnaja promyshlennost' [Metallurgical and mining industry]. 2006, no. 2, pp. 65—69 (in Russian).

Добровольский А. Г. Шликерное литье. Москва : Металлургия, 1977. 240 с.

Dobrovol'skij A. G. Shlikernoe lit'e [Slip casting]. Moscow, Metallurgija Publ. [Metallurgy], 1977. 240 p. (in Russian).

Влияние количества диспергирующей и упрочняющей добавок на реологические свойства глиноземистых щликеров и образцов корундовой керамики / В. В. Мартыненко и др. Технология и применение огнеупоров и технической керамики в промышленности : тез. докл. междунар. науч.-техн. конф., г. Харьков, 11—12 мая 2016 г. Харьков : Оригинал, 2016. С. 30—32.

Martynenko V. V., Mishneva Ju. E., Kushchenko K. I., Krahmal' Ju. A., Karjakina Je. L. Vlijanie kolichestva dispergirujushhej i uprochnjajushhej dobavok na reologicheskie svojstva glinozemistyh shhlikerov i obrazcov korundovoj keramiki [The effect of the amount of dispersing and hardening additives on the rheological properties of alumina slips and samples of corundum ceramics]. Tehnologija i primenenie ogneuporov i tehnicheskoj keramiki v promyshlennosti. Tezisy dokladov mezhdunarodnoj nauchno-tehnicheskoj konferencii, Kharkov, 11—12 May 2016 [Technology and application refractories and technical ceramics in industry. Abstracts of Int. Sci.-Techn. Conf., Kharkov, 11—12 May 2016]. Kharkov, Original Publ., 2016, pp. 30—32 (in Russian).

Исследование реологических свойств глиноземистых шликеров, содержащих новые диспергирующую и упрочняющую добавки / В. В. Мартыненко и др. Зб. наук. пр. ПАТ «УКРНДІ ВОГНЕТРИВІВ ІМ. А. С. БЕРЕЖНОГО». Харків : ПАТ «УКРНДІ ВОГНЕТРИВІВ ІМ. А. С. БЕРЕЖНОГО», 2016. № 116. С. 98—109.

Martynenko V. V., Primachenko V. V., Mishneva Ju. E., Kushchenko K. I., Krahmal' Ju. A., Karjakina Je. L. Issledovanie reologicheskih svojstv glinozemistyh shlikerov, soderzhashhih novye dispergirujushhuju i uprochnjajushhuju dobavki [Study of the rheological properties of alumina slips containing new dispersing and hardening additives]. Zb. nauk. pr. PAT "UKRNDI VOGNETRYVIV IM. A. S. BEREZHNOHO" [Coll. Sci. Proc. of PJSC "THE URIR NAVED AFTER A. S. BEREZHNOY"]. Kharkov, PAT "UKRNDI VOGNETRYVIV IM. A. S. BEREZHNOHO" Publ., 2016, no. 116, pp. 98—109 (in Russian).

Влияние температуры обжига на спекание корундовой керамики, изготавливаемой методом шликерного литья / В. В. Мартыненко и др. Технология и применение огнеупоров и технической керамики в промышленности : тез. докл. междунар. науч.-техн. конф., г. Харьков, 14—15 мая 2019 г. Харьков : ДІСА ПЛЮС, 2019. С. 21—22.

Martynenko V. V., Kushchenko K. I., Krahmal' Ju. A., Mishneva Ju. E. Vlijanie temperatury obzhiga na spekanie korundovoj keramiki, izgotavlivaemoj motodom shlikernogo lit'ja [The influence of firing temperature on sintering of corundum ceramics produced by slip casting]. Tehnologija i primenenie ogneuporov i tehnicheskoj keramiki v promyshlennosti. Tezisy dokladov mezhdunarodnoj nauchno-tehnicheskoj konferencii, Kharkov, 14—15 May 2019 [Technology and application refractories and technical ceramics in industry. Abstracts of Int. Sci.-Techn. Conf., Kharkov, 14—15 May 2019]. Kharkov, DISA PLUS Publ., 2019, pp. 21—22 (in Russian).

Исследование влияния температуры и режима термообработки на свойства корундовой керамики, изготавливаемой шликерным литьем из реактивного глинозема / В. В. Мартыненко и др. Научные исследования по огнеупорам и технической керамике : сб. науч. тр. Харьков : АТ «УкрНДІВ імені А. С. Бережного», 2019. № 119. С. 67—81. https://doi.org/10.35857/2663-3566.119.07.

Martynenko V. V., Primachenko V. V., Kushchenko K. I., Krahmal' Ju. A., Mishneva Ju. E. Issledovanie vlijanija temperatury i rezhima termoobrabotki na svojstva korundovoj keramiki, izgotavlivaemoj shlikernym lit'em iz reaktivnogo glinozema [The investigation of the effect of temperature and heat treatment mode on the properties of corundum ceramics manufactured by slip casting from reactive alumina]. Nauchnye issledovaniya po ogneuporam i tekhnicheskoy keramike: sb. nauch. tr. [Scientific Researches on Refractories and Technical Ceramics : Coll. Sci. Proc.]. Kharkov, AT "UkrNDIV imeni A. S. Berezhnogo" Publ., 2019, no. 119, pp. 67—81 (in Russian).

Павлушкин Н. М. Спеченный корунд. Москва : Госстройиздат, 1961. 209 с.

Pavlushkin N. M. Spechennyj korund [Sintered corundum]. Moscow, Gosstrojizdat Publ., 1961, 209 p. (in Russian).

Published
2020-12-30
How to Cite
Martynenko, V. V., KushchenkoР. O., Kushchenko, K. I., Krakhmal, Y. O., Karjakina, E. L., & Mishnyova, Y. Y. (2020). Influence research of temperature heat treatment on the microstructure of alumina ceramics. Scientific Research on Refractories and Technical Ceramics, 120, 134-143. https://doi.org/10.35857/2663-3566.120.13

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