Batch Rotary Kiln Calcination of YBaCuO Precursor Powders

Suhas D. Shelukar; H. G.Keshava Sundar; Raphael Semiat; James T. Richardson; Dan Luss

doi:10.1111/j.1151-2916.1993.tb03816.x

Batch Rotary Kiln Calcination of YBaCuO Precursor Powders

Suhas D. Shelukar, H. G.Keshava Sundar, Raphael Semiat, James T. Richardson, Dan Luss^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Precursor powders of Y₁Ba₂Cu₃O_6+x (123) derived from spray roasting were calcined in a batch rotary kiln. The optimum conditions were 15 min in air at temperatures between 920° and 940°C for 1.5 vol% solid loading. Pure 123 was formed in a single calcination step from homogeneous, micrometer‐sized precursor material containing Y₂O₃, CuO, and BaCO₃. Rotation speed did not affect the product quality, but longer calcination times are needed at higher loadings. Product agglomeration increased with increasing loading and decreasing rotation speed. In nitrogen, 123 decomposed so that a pure product could not be obtained. The BaCO₃ decomposition is the rate‐limiting step in the calcination. The presence of Ba(NO₃)₂ in the precursor led to formation of intermediate phases.

Original language	English
Pages (from-to)	518-522
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	76
Issue number	2
DOIs	https://doi.org/10.1111/j.1151-2916.1993.tb03816.x
State	Published - Feb 1993
Externally published	Yes

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10.1111/j.1151-2916.1993.tb03816.x

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title = "Batch Rotary Kiln Calcination of YBaCuO Precursor Powders",

abstract = "Precursor powders of Y1Ba2Cu3O6+x (123) derived from spray roasting were calcined in a batch rotary kiln. The optimum conditions were 15 min in air at temperatures between 920° and 940°C for 1.5 vol% solid loading. Pure 123 was formed in a single calcination step from homogeneous, micrometer‐sized precursor material containing Y2O3, CuO, and BaCO3. Rotation speed did not affect the product quality, but longer calcination times are needed at higher loadings. Product agglomeration increased with increasing loading and decreasing rotation speed. In nitrogen, 123 decomposed so that a pure product could not be obtained. The BaCO3 decomposition is the rate‐limiting step in the calcination. The presence of Ba(NO3)2 in the precursor led to formation of intermediate phases.",

author = "Shelukar, {Suhas D.} and Sundar, {H. G.Keshava} and Raphael Semiat and Richardson, {James T.} and Dan Luss",

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language = "英语",

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journal = "Journal of the American Ceramic Society",

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T1 - Batch Rotary Kiln Calcination of YBaCuO Precursor Powders

AU - Shelukar, Suhas D.

AU - Sundar, H. G.Keshava

AU - Semiat, Raphael

AU - Richardson, James T.

AU - Luss, Dan

PY - 1993/2

Y1 - 1993/2

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AB - Precursor powders of Y1Ba2Cu3O6+x (123) derived from spray roasting were calcined in a batch rotary kiln. The optimum conditions were 15 min in air at temperatures between 920° and 940°C for 1.5 vol% solid loading. Pure 123 was formed in a single calcination step from homogeneous, micrometer‐sized precursor material containing Y2O3, CuO, and BaCO3. Rotation speed did not affect the product quality, but longer calcination times are needed at higher loadings. Product agglomeration increased with increasing loading and decreasing rotation speed. In nitrogen, 123 decomposed so that a pure product could not be obtained. The BaCO3 decomposition is the rate‐limiting step in the calcination. The presence of Ba(NO3)2 in the precursor led to formation of intermediate phases.

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Batch Rotary Kiln Calcination of YBaCuO Precursor Powders

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