Glass in Two Forms: Heterogeneous Electrical Relaxation in Nanoglassy Petalite

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Glassy materials with specific functions are almost universally used in our daily life. If prepared via quenching, that is, by rapid cooling of the molten glass, a frozen liquid with a high degree of lattice disorder and stress is obtained. The release of stress through mechanical action may significantly affect the microstructure and dynamic features of the so-obtained nanoglass. Considering ion conducting glasses, it has recently been shown that mechanical treatment of glasses causes the long-range ion transport to significantly decrease. The origin of this astonishing behavior of nanoglasses is, however, far from being understood completely. Here, we show that depending on the duration of mechanical impact in a high-energy planetary ball mill, the petalite glass, LiAlSi 4 O 10 , passes through a state with two Li reservoirs distinctly differing in electrical relaxation and, thus, in ion transport. The two species, characterized by electrical relaxation rates differing by two orders of magnitude, show up clearly if we use the electric modulus representation to analyze the data. This feature is also seen in conductivity spectra revealing a two-step increase of the conductivity with frequency. Accordingly, we propose a two-phase model with nanometer-sized non-relaxed glassy particles next to or surrounded by structurally relaxed regions.

Originalspracheenglisch
Seiten (von - bis)10153-10162
Seitenumfang10
FachzeitschriftJournal of Physical Chemistry C
Jahrgang123
Ausgabenummer15
DOIs
PublikationsstatusVeröffentlicht - 2019

Fingerprint

Glass
glass
Ions
conductivity
ions
Ball mills
Molten materials
balls
Quenching
quenching
disorders
Cooling
cooling
conduction
microstructure
Microstructure
causes
Liquids
liquids
energy

ASJC Scopus subject areas

  • !!Electronic, Optical and Magnetic Materials
  • !!Energy(all)
  • !!Physical and Theoretical Chemistry
  • !!Surfaces, Coatings and Films

Dies zitieren

Glass in Two Forms : Heterogeneous Electrical Relaxation in Nanoglassy Petalite. / Gadermaier, Bernhard; Stanje, Bernhard; Wilkening, Alexandra; Hanzu, Ilie; Heitjans, Paul; Wilkening, H. Martin R.

in: Journal of Physical Chemistry C, Jahrgang 123, Nr. 15, 2019, S. 10153-10162.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

@article{79235e2a7cbf4e4997f5128611773f7b,
title = "Glass in Two Forms: Heterogeneous Electrical Relaxation in Nanoglassy Petalite",
abstract = "Glassy materials with specific functions are almost universally used in our daily life. If prepared via quenching, that is, by rapid cooling of the molten glass, a frozen liquid with a high degree of lattice disorder and stress is obtained. The release of stress through mechanical action may significantly affect the microstructure and dynamic features of the so-obtained nanoglass. Considering ion conducting glasses, it has recently been shown that mechanical treatment of glasses causes the long-range ion transport to significantly decrease. The origin of this astonishing behavior of nanoglasses is, however, far from being understood completely. Here, we show that depending on the duration of mechanical impact in a high-energy planetary ball mill, the petalite glass, LiAlSi 4 O 10 , passes through a state with two Li reservoirs distinctly differing in electrical relaxation and, thus, in ion transport. The two species, characterized by electrical relaxation rates differing by two orders of magnitude, show up clearly if we use the electric modulus representation to analyze the data. This feature is also seen in conductivity spectra revealing a two-step increase of the conductivity with frequency. Accordingly, we propose a two-phase model with nanometer-sized non-relaxed glassy particles next to or surrounded by structurally relaxed regions.",
author = "Bernhard Gadermaier and Bernhard Stanje and Alexandra Wilkening and Ilie Hanzu and Paul Heitjans and Wilkening, {H. Martin R.}",
year = "2019",
doi = "10.1021/acs.jpcc.9b01423",
language = "English",
volume = "123",
pages = "10153--10162",
journal = "The journal of physical chemistry (Washington, DC) / C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "15",

}

TY - JOUR

T1 - Glass in Two Forms

T2 - Heterogeneous Electrical Relaxation in Nanoglassy Petalite

AU - Gadermaier, Bernhard

AU - Stanje, Bernhard

AU - Wilkening, Alexandra

AU - Hanzu, Ilie

AU - Heitjans, Paul

AU - Wilkening, H. Martin R.

PY - 2019

Y1 - 2019

N2 - Glassy materials with specific functions are almost universally used in our daily life. If prepared via quenching, that is, by rapid cooling of the molten glass, a frozen liquid with a high degree of lattice disorder and stress is obtained. The release of stress through mechanical action may significantly affect the microstructure and dynamic features of the so-obtained nanoglass. Considering ion conducting glasses, it has recently been shown that mechanical treatment of glasses causes the long-range ion transport to significantly decrease. The origin of this astonishing behavior of nanoglasses is, however, far from being understood completely. Here, we show that depending on the duration of mechanical impact in a high-energy planetary ball mill, the petalite glass, LiAlSi 4 O 10 , passes through a state with two Li reservoirs distinctly differing in electrical relaxation and, thus, in ion transport. The two species, characterized by electrical relaxation rates differing by two orders of magnitude, show up clearly if we use the electric modulus representation to analyze the data. This feature is also seen in conductivity spectra revealing a two-step increase of the conductivity with frequency. Accordingly, we propose a two-phase model with nanometer-sized non-relaxed glassy particles next to or surrounded by structurally relaxed regions.

AB - Glassy materials with specific functions are almost universally used in our daily life. If prepared via quenching, that is, by rapid cooling of the molten glass, a frozen liquid with a high degree of lattice disorder and stress is obtained. The release of stress through mechanical action may significantly affect the microstructure and dynamic features of the so-obtained nanoglass. Considering ion conducting glasses, it has recently been shown that mechanical treatment of glasses causes the long-range ion transport to significantly decrease. The origin of this astonishing behavior of nanoglasses is, however, far from being understood completely. Here, we show that depending on the duration of mechanical impact in a high-energy planetary ball mill, the petalite glass, LiAlSi 4 O 10 , passes through a state with two Li reservoirs distinctly differing in electrical relaxation and, thus, in ion transport. The two species, characterized by electrical relaxation rates differing by two orders of magnitude, show up clearly if we use the electric modulus representation to analyze the data. This feature is also seen in conductivity spectra revealing a two-step increase of the conductivity with frequency. Accordingly, we propose a two-phase model with nanometer-sized non-relaxed glassy particles next to or surrounded by structurally relaxed regions.

UR - http://www.scopus.com/inward/record.url?scp=85064331527&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.9b01423

DO - 10.1021/acs.jpcc.9b01423

M3 - Article

VL - 123

SP - 10153

EP - 10162

JO - The journal of physical chemistry (Washington, DC) / C

JF - The journal of physical chemistry (Washington, DC) / C

SN - 1932-7447

IS - 15

ER -