ChemInform Abstract: Preparation of Barium Titanate Films at 55 °C by an Electrochemical Method.

Bendale, P.; Venigalla, Sridhar; Ambrose, J. R.; Verink, E. D.; Adair, James H.

doi:10.1002/chin.199402010

Cited by 3 publications

(8 citation statements)

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“…11(a)], 56 the existing form of barium is from a collective effect of the concentration of Ba 2+ in the aqueous solution, pH value, and gaseous atmosphere. 11(a)], 56 the existing form of barium is from a collective effect of the concentration of Ba 2+ in the aqueous solution, pH value, and gaseous atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…39 As shown in Fig. 56 It has been generally known that the BaCO 3 impurity phase is not stable in a high-temperature annealing process, in which the BaCO 3 gradually decomposes with increasing heat-treatment temperature. This observation is significant in contrast to the BaTiO 3 ceramics prepared via the conventional thermal sintering route where dense solids are generally obtained at much higher temperatures of 1200°C-1400°C for several hours.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in the predominance diagram of BaTiO 3 -H 2 O-CO 2 system [ Fig. 11(a)], 56 the existing form of barium is from a collective effect of the concentration of Ba 2+ in the aqueous solution, pH value, and gaseous atmosphere. Obviously, the production of BaTiO 3 should be achieved at a higher concentration of Ba 2+ solution, as well as the pH environment.…”

Section: Resultsmentioning

confidence: 99%

“…11). 56 It has been generally known that the BaCO 3 impurity phase is not stable in a high-temperature annealing process, in which the BaCO 3 gradually decomposes with increasing heat-treatment temperature. 60 Around 900°C, this phase can be removed and, simultaneously, a crystalline phase of BaTiO 3 is further produced via the chemical reaction between the Ba species from the decomposition and the titanium source.…”

Section: Resultsmentioning

confidence: 99%

“…(a) Theoretical predominance diagram for BaTiO 3 -H 2 O-CO 2 system. A reproduction from reference[56]. (b) Schematic illustration of the incongruent dissolution of BaTiO 3 in aqueous solution.…”

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confidence: 99%

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Cold Sintering Process: A Novel Technique for Low‐Temperature Ceramic Processing of Ferroelectrics

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Research on sintering of dense ceramic materials has been very active in the past decades and still keeps gaining in popularity. Although a number of new techniques have been developed, the sintering process is still performed at high temperatures. Very recently we established a novel protocol, the “Cold Sintering Process (CSP)”, to achieve dense ceramic solids at extraordinarily low temperatures of <300°C. A wide variety of chemistries and composites were successfully densified using this technique. In this article, a comprehensive CSP tutorial will be delivered by employing three classic ferroelectric materials (KH2PO4, NaNO2, and BaTiO3) as examples. Together with detailed experimental demonstrations, fundamental mechanisms, as well as the underlying physics from a thermodynamics perspective, are collaboratively outlined. Such an impactful technique opens up a new way for cost‐effective and energy‐saving ceramic processing. We hope that this article will provide a promising route to guide future studies on ultralow temperature ceramic sintering or ceramic materials related integration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Cold Sintering Process: A Novel Technique for Low‐Temperature Ceramic Processing of Ferroelectrics

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Current understanding and applications of the cold sintering process

Cheng

et al. 2019

Front. Chem. Sci. Eng.

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In traditional ceramic processing techniques, high sintering temperature is necessary to achieve fully dense microstructures. But it can cause various problems including warpage, overfiring, element evaporation, and polymorphic transformation. To overcome these drawbacks, a novel processing technique called "cold sintering process (CSP)" has been explored by Randall et al. CSP enables densification of ceramics at ultra-low temperature (£300°C) with the assistance of transient aqueous solution and applied pressure. In CSP, the processing conditions including aqueous solution, pressure, temperature, and sintering duration play critical roles in the densification and properties of ceramics, which will be reviewed. The review will also include the applications of CSP in solid-state rechargeable batteries. Finally, the perspectives about CSP is proposed.

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Hydrothermal-Assisted Cold Sintering Process: A New Guidance for Low-Temperature Ceramic Sintering

Guo

Baker

et al. 2016

ACS Appl. Mater. Interfaces

180

170

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Sintering is a thermal treatment process that is generally applied to achieve dense bulk solids from particulate materials below the melting temperature. Conventional sintering of polycrystalline ceramics is prevalently performed at quite high temperatures, normally up to 1000 to 1200 °C for most ceramic materials, typically 50% to 75% of the melting temperatures. Here we present a new sintering route to achieve dense ceramics at extraordinarily low temperatures. This method is basically modified from the cold sintering process (CSP) we developed very recently by specifically incorporating the hydrothermal precursor solutions into the particles. BaTiO3 nano polycrystalline ceramics are exemplified for demonstration due to their technological importance and normally high processing temperature under conventional sintering routes. The presented technique could also be extended to a much broader range of material systems than previously demonstrated via a hydrothermal synthesis using water or volatile solutions. Such a methodology is of significant importance, because it provides a chemical roadmap for cost-effective inorganic processing that can enable broad practical applications.

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ChemInform Abstract: Preparation of Barium Titanate Films at 55 °C by an Electrochemical Method.

Cited by 3 publications

References 1 publication

Cold Sintering Process: A Novel Technique for Low‐Temperature Ceramic Processing of Ferroelectrics

Cold Sintering Process: A Novel Technique for Low‐Temperature Ceramic Processing of Ferroelectrics

Current understanding and applications of the cold sintering process

Hydrothermal-Assisted Cold Sintering Process: A New Guidance for Low-Temperature Ceramic Sintering

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