Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders

Hong Wen Wang; D. A. Hall; F. R. Sale

doi:10.1007/BF02546753

Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders

Hong Wen Wang, D. A. Hall, F. R. Sale

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

Abstract

Raw chemicals such as metal nitrates and chlorides were found to affect the thermal decomposition behaviour of EDTA-gel precursors used for the production of ceramic powders. Fine, homogeneous ceramic powders were produced from nitrate solutions while chlorides gave segregated phases. In studies on the production of lead zirconate titanate (PZT) using chlorides, the segregation and loss of lead was observed and shown to be caused by the formation and evaporation of PbCl2. Thermal analysis (DTA/TG) quantitatively proved the suggested reaction mechanism for this phase segregation. Crystallization of the desired perovskite phase of lead zirconate titanate (PZT) and barium titanate (BT) initiated at temperatures as low as 250°C in the nitrate-EDTA precursors. Water of crystallization and formation of BaCO3 in the barium titanate precursor were suggested to account for differences in the observed decompositional behaviours of the BT and PZT precursors. © 1994 Akadémiai Kiadó.

Original language	English
Pages (from-to)	823-838
Number of pages	15
Journal	Journal of Thermal Analysis
Volume	42
Issue number	4
DOIs	https://doi.org/10.1007/BF02546753
Publication status	Published - Oct 1994

Keywords

EDTA-gel precursors
ferroelectric ceramic powders

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10.1007/BF02546753

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title = "Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders",

abstract = "Raw chemicals such as metal nitrates and chlorides were found to affect the thermal decomposition behaviour of EDTA-gel precursors used for the production of ceramic powders. Fine, homogeneous ceramic powders were produced from nitrate solutions while chlorides gave segregated phases. In studies on the production of lead zirconate titanate (PZT) using chlorides, the segregation and loss of lead was observed and shown to be caused by the formation and evaporation of PbCl2. Thermal analysis (DTA/TG) quantitatively proved the suggested reaction mechanism for this phase segregation. Crystallization of the desired perovskite phase of lead zirconate titanate (PZT) and barium titanate (BT) initiated at temperatures as low as 250°C in the nitrate-EDTA precursors. Water of crystallization and formation of BaCO3 in the barium titanate precursor were suggested to account for differences in the observed decompositional behaviours of the BT and PZT precursors. {\textcopyright} 1994 Akad{\'e}miai Kiad{\'o}.",

keywords = "EDTA-gel precursors, ferroelectric ceramic powders",

author = "Wang, {Hong Wen} and Hall, {D. A.} and Sale, {F. R.}",

year = "1994",

month = oct,

doi = "10.1007/BF02546753",

language = "English",

volume = "42",

pages = "823--838",

journal = "Journal of Thermal Analysis",

issn = "0368-4466",

publisher = "Akademiai Kiado ZRt.",

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}

TY - JOUR

T1 - Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders

AU - Wang, Hong Wen

AU - Hall, D. A.

AU - Sale, F. R.

PY - 1994/10

Y1 - 1994/10

N2 - Raw chemicals such as metal nitrates and chlorides were found to affect the thermal decomposition behaviour of EDTA-gel precursors used for the production of ceramic powders. Fine, homogeneous ceramic powders were produced from nitrate solutions while chlorides gave segregated phases. In studies on the production of lead zirconate titanate (PZT) using chlorides, the segregation and loss of lead was observed and shown to be caused by the formation and evaporation of PbCl2. Thermal analysis (DTA/TG) quantitatively proved the suggested reaction mechanism for this phase segregation. Crystallization of the desired perovskite phase of lead zirconate titanate (PZT) and barium titanate (BT) initiated at temperatures as low as 250°C in the nitrate-EDTA precursors. Water of crystallization and formation of BaCO3 in the barium titanate precursor were suggested to account for differences in the observed decompositional behaviours of the BT and PZT precursors. © 1994 Akadémiai Kiadó.

AB - Raw chemicals such as metal nitrates and chlorides were found to affect the thermal decomposition behaviour of EDTA-gel precursors used for the production of ceramic powders. Fine, homogeneous ceramic powders were produced from nitrate solutions while chlorides gave segregated phases. In studies on the production of lead zirconate titanate (PZT) using chlorides, the segregation and loss of lead was observed and shown to be caused by the formation and evaporation of PbCl2. Thermal analysis (DTA/TG) quantitatively proved the suggested reaction mechanism for this phase segregation. Crystallization of the desired perovskite phase of lead zirconate titanate (PZT) and barium titanate (BT) initiated at temperatures as low as 250°C in the nitrate-EDTA precursors. Water of crystallization and formation of BaCO3 in the barium titanate precursor were suggested to account for differences in the observed decompositional behaviours of the BT and PZT precursors. © 1994 Akadémiai Kiadó.

KW - EDTA-gel precursors

KW - ferroelectric ceramic powders

U2 - 10.1007/BF02546753

DO - 10.1007/BF02546753

M3 - Article

SN - 0368-4466

VL - 42

SP - 823

EP - 838

JO - Journal of Thermal Analysis

JF - Journal of Thermal Analysis

IS - 4

ER -

Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders

Abstract

Keywords

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