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Journal of Inorganic Materials, Volume. 35, Issue 7, 822(2020)

Reaction Synthesizes of ZrN and Phase Diagram in the Si3N4-ZrO2-La2O3 System

Yanrui LI... Youjun LU*, Yang LIU, Zhenxia YUAN and Zhenkun HUANG |Show fewer author(s)
Author Affiliations
  • School of Materials Science and Engineering, North Minzu University,Yinchuan 750021,China
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    Figures & Tables(9)
    XRD patterns of the samples of 0.3S′0.5Z0.2L and 0.43S′0.46Z0.11L (a), 0.2S′0.3Z0.5L and 0.5S′0.3Z0.2L (b),0.4S′0.1Z0.5L and 0.7S′0.1Z0.2L (c) sintered at 1570 ℃ for 1 h
    1. XRD patterns of the samples of 0.3S′0.5Z0.2L and 0.43S′0.46Z0.11L (a), 0.2S′0.3Z0.5L and 0.5S′0.3Z0.2L (b),0.4S′0.1Z0.5L and 0.7S′0.1Z0.2L (c) sintered at 1570 ℃ for 1 h

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    Phase diagram of SiO2-La2O3-ZrO2 ternary system at 1570 ℃
    2. Phase diagram of SiO2-La2O3-ZrO2 ternary system at 1570 ℃

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    XRD patterns of the samples 1S3Z3L and 2S6Z3L after sintered at 1500 ℃ for 1 h
    3. XRD patterns of the samples 1S3Z3L and 2S6Z3L after sintered at 1500 ℃ for 1 h

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    Phase diagram of Si3N4-ZrO2-La2O3 ternary system at 1500 ℃
    4. Phase diagram of Si3N4-ZrO2-La2O3 ternary system at 1500 ℃

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    XRD patterns of the samples (a) 3S9Z7L and 4S9Z10L, (b) 4S3Z6L and 4S3Z12L after sintered at 1500 ℃ for 1 h, and (c) 8S3Z8L after sintered at 1550 ℃ for 1 h and the samples 2S0Z3L after sintered at 1500 ℃ for 1 h
    5. XRD patterns of the samples (a) 3S9Z7L and 4S9Z10L, (b) 4S3Z6L and 4S3Z12L after sintered at 1500 ℃ for 1 h, and (c) 8S3Z8L after sintered at 1550 ℃ for 1 h and the samples 2S0Z3L after sintered at 1500 ℃ for 1 h

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    Phase diagram of Si3N4-ZrO2-La2O3-SiO2-ZrN quinary system at 1500 ℃
    6. Phase diagram of Si3N4-ZrO2-La2O3-SiO2-ZrN quinary system at 1500 ℃

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    • Table 1. Phase compositions of the SiO2-La2O3-ZrO2 system after sintered at 1570 ℃

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      Table 1. Phase compositions of the SiO2-La2O3-ZrO2 system after sintered at 1570 ℃

      SampleSiO2/La2O3/ZrO2Phase composition(XRD analysis results*)
      0.3S′0.5Z0.2L0.3/0.5/0.2La2Zr2O7(s)La2SiO5(m)La2O3(w)
      0.43S′0.46Z0.11L0.43/0.46/0.11La2Zr2O7(s)La4.67Si3O13(s)La2SiO5(m)
      0.2S′0.3Z0.5L0.2/0.3/0.5La2Zr2O7(vs)La4.67Si3O13(vs)ZrO2(w)
      0.5S′0.3Z0.2L0.5/0.3/0.2La2Si2O7(vs)La4.67Si3O13(vs)ZrO2(w)
      0.4S′0.1Z0.5L0.4/0.1/0.5ZrSiO4(vs)La2Si2O7(s)ZrO2(m)
      0.7S′0.1Z0.2L0.7/0.1/0.2ZrSiO4(vs)La2Si2O7(m)SiO2(w)

    • Table 2. Phase compositions of the Si3N4-ZrO2-La2O3 system samples at 1500 ℃

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      Table 2. Phase compositions of the Si3N4-ZrO2-La2O3 system samples at 1500 ℃

      SampleSi3N4/ZrO2/La2O3Phase composition(XRD analysis results*)
      1S3Z3L1/3/3La5Si3NO12(s)La2Zr2O7(s)ZrN(m)
      2S6Z3L2/6/3La4.67Si3O13 (vs)ZrN(vs)
      ZrO2(vw)
      3S9Z7L3/9/7La4.67Si3O13(vs)ZrN(m),
      4S9Z10L4/9/10La5Si3NO12(vs)ZrN(m)
      4S3Z6L4/3/6LaSiNO2 (vs)ZrN(w)La5Si3NO12(w)
      4S3Z12L4/3/12La4Si2N2O7(vs)ZrN(w)La5Si3NO12(w)
      8S3Z8L(1550 ℃)8/3/8LaSiNO2(vs)ZrN(w)La2Si6N8O3(w)

    • Table 3. Thermodynamic calculation results of reaction formula

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      Table 3. Thermodynamic calculation results of reaction formula

      T/℃ΔG/(kJ·mol-1)T/℃ΔG/(kJ·mol-1)
      1400-122.5131600-139.531
      1500-130.8931700-148.436
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    Yanrui LI, Youjun LU, Yang LIU, Zhenxia YUAN, Zhenkun HUANG. Reaction Synthesizes of ZrN and Phase Diagram in the Si3N4-ZrO2-La2O3 System[J]. Journal of Inorganic Materials, 2020, 35(7): 822

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    Paper Information

    Category: RESEARCH PAPER

    Received: Aug. 12, 2019

    Accepted: --

    Published Online: Mar. 3, 2021

    The Author Email: LU Youjun (youjunlu518@hotmail.com)

    DOI:10.15541/jim20190404

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology