Sol–Gel Synthesis of Oxonitridoaluminosilicates (SiAlON)

Ivicheva, S. N.; Ovsyannikov, N. A.; Лысенков, А. С.; Климашин, А. А.; Kargin, Yu. F.

doi:10.1134/s0036023620120050

Cited by 13 publications

(5 citation statements)

References 23 publications

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“…The sol-gel technique is a chemical process that forms a gel from a liquid solution to create inorganic materials including coatings, glasses, and ceramics [74]. This method is renowned for its adaptability and exact control over the final product's structure and chemical makeup [75,76].…”

Section: From Concept To Applicationmentioning

confidence: 99%

Hybrid Organic–Inorganic Materials Prepared by Sol–Gel and Sol–Gel-Coating Method for Biomedical Use: Study and Synthetic Review of Synthesis and Properties

Barrino

2024

Coatings

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The need to improve the expectancy and quality of life of subjects affected by disabling pathologies that require the replacement or regeneration of tissues or parts of the body has fueled the development of innovative, better-performing materials that are capable of integrating into and being tolerated by body tissues. Materials with these characteristics, i.e., bio-functionality, bio-safety, and biocompatibility, are defined as biomaterials. One of the many methods for producing such materials is the sol–gel technique. This process is mainly used for the preparation of ceramic oxides at low temperatures, through hydrolysis and polycondensation reactions of organometallic compounds within a hydroalcoholic solution. This study is based on a specific type of biomaterial: organic–inorganic hybrids. The aim of this study is to provide an overview of the advantages and disadvantages of the sol–gel technique, as well as describe the preparation and chemical and biological characterization, uses, and future prospects of these biomaterials. In particular, the use of plant drugs as organic components of the hybrid material is the innovation of this manuscript. The biological properties of plant extracts are numerous, and for this reason, they deserve great attention from the scientific community.

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Section: From Concept To Applicationmentioning

confidence: 99%

Hybrid Organic–Inorganic Materials Prepared by Sol–Gel and Sol–Gel-Coating Method for Biomedical Use: Study and Synthetic Review of Synthesis and Properties

Barrino

2024

Coatings

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“…As the demand for high‐efficiency, high‐temperature processes increases, it is now necessary to investigate ways to reduce the grain boundary liquid phase content even further. The advent of nanomaterials and the recent learnings in the field of molecular precursors and polymer‐derived ceramics are opening doors to novel sintering additives, which must be as comprehensively understood as are the conventional powder additives 19 …”

Section: Introductionmentioning

confidence: 99%

“…Further, a liquid organic precursor soluble in isopropanol, aluminum sec ‐butoxide (ASB), has been used to fabricate various alumina ceramics and gels in the past 26–28 . More recent preliminary work exploring the use of alkoxide additives for SiAlON formation indicated potential for improved sintering 19,292 …”

Section: Introductionmentioning

confidence: 99%

“…The advent of nanomaterials and the recent learnings in the field of molecular precursors and polymer-derived ceramics are opening doors to novel sintering additives, which must be as comprehensively understood as are the conventional powder additives. 19 Many of the desirable properties of silicon nitride stem from its highly covalent nature. However, this covalent bonding also makes pure Si 3 N 4 difficult to sinter.…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28] More recent preliminary work exploring the use of alkoxide additives for SiAlON formation indicated potential for improved sintering. 19,292 Base compositions were calculated assuming three equivalent wt% SiO 2 in the Si 3 N 4 powder and 2 wt% Al 2 O 3 in the AlN powder. 21,29 Note that the ratio of O:Al in ASB is twice that in Al 2 O 3 , but it is assumed that excess oxygen in the ASB samples remains at the grain boundary because the defect equation for the β′-SiAlON solid solution requires a 1:1 ratio of Al to O in the Si 3 N 4 lattice.…”

Section: Introductionmentioning

confidence: 99%

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Molecular‐level composition design for efficient synthesis of SiAlON ceramics

2022

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SiAlONs are a class of liquid‐phase sintered ceramics with excellent room‐temperature strength and toughness, but whose residual grain boundary glass softens at high temperatures, limiting use in extreme environments. For this reason, efforts are made to minimize the volume of the grain boundary glass while still facilitating full densification. This work describes a potential route for the densification of SiAlONs with very low concentrations of liquid‐phase sintering additive (e.g., rare‐earth oxides such as yttria) by using an organometallic precursor. Solid solution of Al and O in the Si3N4 lattice was accomplished through the incorporation of solute atoms via liquid organic precursor aluminum sec‐butoxide (ASB). Al2O3 powder is conventionally used for this purpose, and the subsequent lattice softening associated with the solid solution helps to facilitate densification. However, a liquid‐phase additive is still essential for the full densification of SiAlONs. Higher densities were obtained from SiAlON powder blends utilizing organometallic ASB than those utilizing alumina powder, allowing for greater densification at very low Y2O3 concentrations. The thermal decomposition of the organic precursor was investigated by high‐temperature scanning electron microscopy, thermogravimetric analysis, and various X‐ray diffraction experiments. Immersion density measurements and lattice parameter refinements were performed for samples sintered with varying Y2O3 concentrations and/or dwell times. Results indicate that ASB‐containing powder blends favor SiAlON formation more strongly than Al2O3‐containing powder blends and favor densification at very low Y2O3 concentration.

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The Influence of Aluminum Additives on the Nitriding of the Mixture Ferrosilicon–Shungite by SHS Method

Kryukova,

Tatarinova

2024

Springer Proceedings in Physics

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Sol–Gel Synthesis of Oxonitridoaluminosilicates (SiAlON)

Cited by 13 publications

References 23 publications

Hybrid Organic–Inorganic Materials Prepared by Sol–Gel and Sol–Gel-Coating Method for Biomedical Use: Study and Synthetic Review of Synthesis and Properties

Hybrid Organic–Inorganic Materials Prepared by Sol–Gel and Sol–Gel-Coating Method for Biomedical Use: Study and Synthetic Review of Synthesis and Properties

Molecular‐level composition design for efficient synthesis of SiAlON ceramics

The Influence of Aluminum Additives on the Nitriding of the Mixture Ferrosilicon–Shungite by SHS Method

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