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Orientation of particles in an electrorheological fluid under an electric field.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics · 1999 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 4019

Using x-ray diffraction of TGS/wax electrorheological fluid samples under an electric field, particles in the ferroelectric phase (below the Curie temperature) were found to rotate their spontaneous polarization vectors toward the external field direction in …

Study snapshot

PublicationPhysical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics · 1999
Study typeother
Reported directionUnclear
Evidence ratingInsufficient

Abstract

The orientation of the particles in an electrorheological fluid under an electric field has been studied. Triglycine sulfate (TGS)-wax mixtures were applied in this study. Here the TGS particles are in the ferroelectric phase with spontaneous polarization p(s) in the <010> direction at below the Curie temperature T(C) and become paraelectric without a permanent electric moment at above T(C). By measuring x-ray-diffraction intensities of TGS/wax samples under an electric field at below and above T(C), respectively, it is found that the particles with spontaneous polarization turn their p(s) vectors to the direction of the external electric field in addition to forming chains or columns. However, the particles without permanent moment only form chains or columns, in which no preferred orientation of the particles can be observed. The preferred orientation degree is determined by comparing the diffraction intensity in these two cases.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
ExposureNot supplied
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Using x-ray diffraction of TGS/wax electrorheological fluid samples under an electric field, particles in the ferroelectric phase (below the Curie temperature) were found to rotate their spontaneous polarization vectors toward the external field direction in addition to forming chains/columns. Above the Curie temperature (paraelectric, no permanent moment), particles formed chains/columns but showed no preferred particle orientation.

Outcomes measured

  • particle orientation under electric field
  • chain/column formation in electrorheological fluid
  • x-ray diffraction intensity changes under electric field

Limitations

  • No exposure parameters (field strength, waveform/frequency) reported in the abstract
  • No sample size or number of measurements reported in the abstract
  • Study is on material/particle behavior rather than biological or health outcomes
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "external electric field (laboratory)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "particle orientation under electric field",
    "chain/column formation in electrorheological fluid",
    "x-ray diffraction intensity changes under electric field"
  ],
  "main_findings": "Using x-ray diffraction of TGS/wax electrorheological fluid samples under an electric field, particles in the ferroelectric phase (below the Curie temperature) were found to rotate their spontaneous polarization vectors toward the external field direction in addition to forming chains/columns. Above the Curie temperature (paraelectric, no permanent moment), particles formed chains/columns but showed no preferred particle orientation.",
  "effect_direction": "unclear",
  "limitations": [
    "No exposure parameters (field strength, waveform/frequency) reported in the abstract",
    "No sample size or number of measurements reported in the abstract",
    "Study is on material/particle behavior rather than biological or health outcomes"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electrorheological fluid",
    "electric field",
    "triglycine sulfate",
    "TGS",
    "wax mixture",
    "ferroelectric",
    "paraelectric",
    "Curie temperature",
    "spontaneous polarization",
    "x-ray diffraction",
    "particle orientation",
    "chain formation"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1103/physreve.60.4336
PubMed: 11970287

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