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Topic · Materials Chemistry

Thermal Expansion and Ionic Conductivity

Thermal Expansion and Ionic Conductivity is a research topic within Materials Chemistry. Science Explorer counts 15k research works in it since 1951. 9.8% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the phenomenon of negative thermal expansion in various materials, including perovskites, framework compounds, and antiperovskite compounds. It explores the mechanisms, controllability, and technological applications of negative thermal expansion, as well as its correlation with superconductivity and magnetic properties. Additionally, it discusses the development of sodium-beta alumina batteries and the associated challenges and perspectives.

  • Negative Thermal Expansion
  • Materials
  • Perovskite
  • Framework
  • Superconductivity
  • Magnetic Nanocrystals
  • Lattice Dynamics
  • Antiperovskite Compounds
  • Anomalous Physical Properties
  • Sodium-Beta Alumina Batteries
Research works
15k
fractional, since 1951
In the world top 10%
1.5k
per year above
Top-10% rate
9.8%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+70%
the tick is no change
Largest producer
China
53% of the 10 largest, 2022-now
Thermal Expansion and Ionic Conductivity

Which countries lead Thermal Expansion and Ionic Conductivity research?

By volume, China and the United States publish the most (2.3k and 497 works in 2022-now).

By volume, 2022-now

  1. 1 China 2.3k works
  2. 2 United States 497 works
  3. 3 India 352 works
  4. 4 Japan 247 works
  5. 5 Germany 209 works
  6. 6 South Korea 191 works
  7. 7 Russia 168 works
  8. 8 Saudi Arabia 124 works
  9. 9 United Kingdom 110 works
  10. 10 France 107 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

China: 53.4%United States: 11.5%India: 8.2%Japan: 5.7%6 others listed: 21.1%53%largest
China2,296 · 53.4%United States497 · 11.5%India352 · 8.2%Japan247 · 5.7%6 others listed909 · 21.1%

Shares of the rows listed above, not of the whole node.

Which institutions lead Thermal Expansion and Ionic Conductivity research?

By volume in 2022-now, Chinese Academy of Sciences publishes the most Thermal Expansion and Ionic Conductivity research, followed by Russian Academy of Sciences and Helmholtz Association of German Research Centres.

By volume, 2022-now

  1. 1 Chinese Academy of SciencesChina 192 works
  2. 2 Russian Academy of SciencesRussia 88 works
  3. 3 Helmholtz Association of German Research CentresGermany 62 works
  4. 4 Centre National de la Recherche ScientifiqueFrance 54 works
  5. 5 University of Science and Technology BeijingChina 40 works
  6. 6 Tsinghua UniversityChina 37 works
  7. 7 Harbin Institute of TechnologyChina 37 works
  8. 8 Central South UniversityChina 36 works
  9. 9 Zhengzhou UniversityChina 34 works
  10. 10 University of Chinese Academy of SciencesChina 33 works

Who are the leading researchers in Thermal Expansion and Ionic Conductivity?

The most-cited researchers publishing on Thermal Expansion and Ionic Conductivity include Zhong Lin Wang, Michaël Grätzel and John P. Perdew.

  1. 1 Zhong Lin Wang United States 491k citations
  2. 2 Michaël Grätzel Switzerland 458k citations
  3. 3 John P. Perdew United States 436k citations
  4. 4 Georg Kresse Austria 431k citations
  5. 5 Wei Huang China 267k citations
  6. 6 Yi Ping Cui United States 261k citations
  7. 7 Omar M. Yaghi United States 254k citations
  8. 8 Donald G. Truhlar United States 230k citations
  9. 9 Kai You Wang China 224k citations
  10. 10 Mercouri G. Kanatzidis United States 196k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Thermal Expansion and Ionic Conductivity?

The most cited paper in Thermal Expansion and Ionic Conductivity is "Accurate Band Gaps of Semiconductors and Insulators with a Semilocal Exchange-Correlation Potential" (Fabien Tran, Peter Blaha, 2009), with 6,099 citations. Next come "A lithium superionic conductor" (5,000) and "Optimization of parameters for semiempirical methods II. Applications" (3,757).

Most cited papers
#PaperReleasedCitations
1 Accurate Band Gaps of Semiconductors and Insulators with a Semilocal Exchange-Correlation Potential Fabien Tran, Peter Blaha · Physical Review Letters 3 Jun 2009 6,099
2 A lithium superionic conductor Noriaki Kamaya, Kenji Homma, Yuichiro Yamakawa et al. · Nature Materials 28 Jul 2011 5,000
3 Optimization of parameters for semiempirical methods II. Applications James J. P. Stewart · Journal of Computational Chemistry Mar 1989 3,757
4 WIEN2k: An APW+lo program for calculating the properties of solids Peter Blaha, Karlheinz Schwarz, Fabien Tran et al. · The Journal of Chemical Physics Open access 19 Feb 2020 2,724
5 Transition-metal-based magnetic refrigerants for room-temperature applications Ojiyed Tegus, E. Brück, K.H.J. Buschow et al. · Nature 2002 2,671
All 100 most cited papers, with filters and sorting

Where is Thermal Expansion and Ionic Conductivity research done?

The largest centres of Thermal Expansion and Ionic Conductivity research in 2022-now are Beijing (China), Shanghai (China), Wuhan (China) and Xi'an (China). Among places with at least 20 works in it, it is an unusually large share of all research in Jülich.

Largest cities, 2022-now

  1. 1 BeijingChina 372 works
  2. 2 ShanghaiChina 131 works
  3. 3 WuhanChina 107 works
  4. 4 Xi'anChina 104 works
  5. 5 NanjingChina 88 works
  6. 6 GuangzhouChina 73 works
  7. 7 SeoulSouth Korea 67 works
  8. 8 TianjinChina 67 works
  9. 9 HefeiChina 65 works
  10. 10 HangzhouChina 62 works

Where it is the local speciality

  1. JülichDE · 24.0 works18×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Thermal Expansion and Ionic Conductivity than the world average.

See Thermal Expansion and Ionic Conductivity on the map

Where is the best place to study Thermal Expansion and Ionic Conductivity?

Among universities, judged by research, Tsinghua University, University of Science and Technology Beijing and King Khalid University score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%20%40%mean 20.28%fractional works in this field (log) →share of work in the world top 10% →City University of H…Tsinghua UniversityKing Khalid UniversityUniversity of Scienc…
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Tsinghua UniversityChina 70.320.5%3.4×37 +86.7%
2University of Science and Technology BeijingChina 65.512.1%11.0×40 +95.0%
3King Khalid UniversitySaudi Arabia 64.416.8%10.3×18 +1183.8%
4City University of Hong KongChina 64.223.6%5.2×14 +230.9%
5Khwaja Fareed University of Engineering and Information TechnologyPakistan 63.934.2%40.9×9 -
6Nankai UniversityChina 63.325.8%5.1×16 +79.6%
7Beijing Institute of TechnologyChina 62.216.4%5.3×29 +172.2%
8Huazhong University of Science and TechnologyChina 61.216.9%3.5×30 +22.6%
9University of Chinese Academy of SciencesChina 60.414.2%4.2×33 +39.2%
10Mohammed V UniversityMorocco 59.222.3%8.8×16 +267.5%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Thermal Expansion and Ionic Conductivity, country by country

Is Thermal Expansion and Ionic Conductivity research growing?

Output in 2022-2025 was 70% higher than in 2018-2021, peaking in 2026. The fastest-growing topics are Thermal Expansion and Ionic Conductivity.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Thermal Expansion and Ionic Conductivity as a percentage of every work published that year, 0.017% in 2024.

still counting0.010%0.020%0.030%Thermal Expansion and Ionic Conductivity0.026% in 202519801990200020102020

Fractional works of Thermal Expansion and Ionic Conductivity over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Thermal Expansion and Ionic Conductivity9.8% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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