Study on Synthesis and Crystal Structure of Rare-Earth Calcium Silicate

稀土硅酸钙的合成及晶体结构研究

基本信息

  • 批准号:
    10450238
  • 负责人:
  • 金额:
    $ 8.7万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 2000
  • 项目状态:
    已结题

项目摘要

In the present study, CaO-Y_2O_3-SiO_2 ternary system was taken up. In this ternary system, apatite-type structure compounds have been reported at the compositions of Ca_2Y_8Si_6O_<26>, Ca_3Y_6Si_6O_<24> and Ca_4Y_6Si_6O_<25>. It was pointed out that the composition of apatite-type compounds had not been established. The preparation of Ca_2Y_2Si_2O_9 having a cuspidine-type structure was carried out, but the crystallographic data has not been reported yet. Generally, silicates have many isomorphs and form many complicated structures. For this reason, new compounds having new structure are expected in this multicomponent system.In CaO-Y_2O_3-SiO_2 ternary system, the compounds prepared by reaction sintering at 1700K were Ca_2Y_8Si_6O_<26> (apatite-type structure), Ca_2Y_2Si_2O_9 (cuspidine-type structure), Ca_3Y_2Si_3O_<12> (silico-carnotite-type structure) and Ca_3Y_2Si_6O_<18> (new structure).A single-phase having an apatite-type structure was prepared at Ca_2Y_8Si_6O_<26>. This phase is hexagonal, a=b=0.9341(1), c=0.6788(1)nm. The sample with the composition of Ca_3Y_6Si_6O_<24> which was reported as apatite-type compound was two phases, Ca_2Y_8Si_6O_<26> and CaSiO_3. The sample prepared at the composition of Ca_4Y_6Si_6O_<25> consisted of Ca_2Y_8Si_6O_<26> and Ca_3Y_2Si_3O_<12>. 1t was confirmed that Ca_2Y_2Si_2O_9 had a cuspidine-type structure (monoclinic P2_l/c, a=0.74468(3), b=1.049240(3), c= 1.09661 (4)nm, β=110.170(3)゜).The new compound, Ca_3Y_2Si_3O_<12> is isostructual with silico-carnotite (Ca_5(PO_4)_2SiO_4). Ca_3Y_2Si_3O_<12> is orthorhombic P nma, a=0.65574(2), b=1.56066(3), c=1.00399(2)nm. Ca_3Y_2Si_6O_<18> (monoclinic C2/c, a=1.33422(5), b=0.77320(3), c=1.47959(6)nm, β=90.263(3)゜) is composed of ternary SiO_4 rings.
本研究采用CaO-Y_2O_3-SiO_2三元体系。在该三元体系中,已报道了Ca2Y8Si6O&lt;26-gt;,Ca3Y6Si6O24-gt;和Ca4Y6Si6O-lt;25&gt;有人指出,磷灰石类化合物的组成尚未确定。合成了具有尖晶石型结构的Ca2Y2Si2O9,但其晶体结构尚未见报道。一般来说,硅酸盐有许多类质同象,形成许多复杂的结构。在CaO-Y_2O_3-SiO_2三元体系中,1700K下反应烧结得到的化合物有:Ca_2Y_8Si_6O_(26)(磷灰石型结构)、Ca_2Y_2Si_2O_9(尖晶石型结构)、Ca_3Y_2Si_3O_(12)和Ca_3Y_2Si_6O_(?)(新结构)。在Ca2Y8Si6O;26&gt;该晶体为六方晶系,a=b=0.9341(1),c=0.6788(1)nm。由Ca3Y_6Si_6O_(26)和CaSiO_3组成的样品由Ca2Y_8Si_6Si_6O_(26)和CaSiO_3两相组成。1T确证了化合物Ca_2Y_2Si_2O_9具有尖晶石型结构(单斜晶系P2_L/c,a=0.74468(3),b=1.049240(3),c=1.09661(4)nm,β=1.09661(3)゜),新化合物Ca_3Y_2Si_3O_&lt;12&gt;Ca3Y2Si3O&lt;12&gt;为正交晶系Pnma,a=0.65574(2),b=1.56066(3),c=1.00399(2)nm。单斜晶系C2/c,a=1.33422(5),b=0.77320(3),c=1.47959(6)nm,β=90.263(3)゜)由三元SiO_4环组成。

项目成果

期刊论文数量(24)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Nagasawa, H.Yamane and M.Shimada: "Synthesis and Crystal Structure of New Oxides in CaO-Y_2O_3-SiO_2 System"Proceedings of 10th IUPAC on High Temperature Materials Chemistry. (in press). (2000)
T.Nagasawa、H.Yamane 和 M.Shimada:“CaO-Y_2O_3-SiO_2 体系中新型氧化物的合成和晶体结构”第 10 届 IUPAC 高温材料化学论文集。
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    0
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T.Nagasawa: "Synthesis and Crystal Structure of New Oxides in CaO-Y_2O_3-SiO_2 System"Proceedings of 10^<th> IUPAC on High Temperature Materials Chemistry. (in press). (2000)
T.Nagasawa:“CaO-Y_2O_3-SiO_2 体系中新型氧化物的合成和晶体结构”第 10 届 IUPAC 高温材料化学会议录。
  • DOI:
  • 发表时间:
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  • 影响因子:
    0
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  • 通讯作者:
H.Yamane: "Crystal Structure and Thermal Expansion of Ca_2Y_2Si_2O_9"Materials Research Bulletin. 33. 845-853 (1998)
H.Yamane:“Ca_2Y_2Si_2O_9 的晶体结构和热膨胀”材料研究通报。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
H.Yamane: "Crystal Structure and Thermal Expansion of Ca_2Y_2Si_2O_9" Materials Research Bulletin. 33・6. 845-853 (1998)
H. Yamane:“Ca_2Y_2Si_2O_9 的晶体结构和热膨胀”材料研究通报 33・6(1998)。
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  • 影响因子:
    0
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  • 通讯作者:
長沢 徹: "大気中1700Kで合成されたCaO-Y_2O_3-SiO_2系の酸化物" 日本セラミックス協会学術論文誌. 106・12. 1238-1241 (1998)
长泽彻:“大气中1700K下合成的CaO-Y_2O_3-SiO_2系氧化物”日本陶瓷学会杂志106・12(1998)。
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SHIMADA Masahiko其他文献

SHIMADA Masahiko的其他文献

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{{ truncateString('SHIMADA Masahiko', 18)}}的其他基金

Altered brain volume in neuropathic pain patients
神经性疼痛患者的脑容量改变
  • 批准号:
    16K11743
  • 财政年份:
    2016
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of the method of treatment for neuropathic pain -Basic study of the effect of iontophoresis-
神经性疼痛治疗方法的开发-离子电渗疗法效果的基础研究-
  • 批准号:
    22592253
  • 财政年份:
    2010
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A Study on the intravenous sedation with propofol - Function of Swallowing, BIS monitor and blood concentration of propofol -
异丙酚静脉镇静研究-吞咽功能、BIS监测及异丙酚血药浓度-
  • 批准号:
    16591997
  • 财政年份:
    2004
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A Study on the intravenous sedation with propofal - BIS monitor and blood concentration of propofol
丙泊酚静脉镇静-BIS监测及丙泊酚血药浓度研究
  • 批准号:
    13672095
  • 财政年份:
    2001
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Synthesis and Characterization of Multi-Component Metal Nitrides
多组分金属氮化物的合成与表征
  • 批准号:
    13450263
  • 财政年份:
    2001
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Gallium Nitride Single Crystal Growth by Flux Method
助熔剂法生长氮化镓单晶
  • 批准号:
    12555175
  • 财政年份:
    2000
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Fabrication of high Luminous Materials for high Performance Display Devices
高性能显示器件用高发光材料的制备研究
  • 批准号:
    09555187
  • 财政年份:
    1997
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Stress-Induced Phase Transformation of Rare Earth Aluminates
稀土铝酸盐应力诱导相变研究
  • 批准号:
    07455262
  • 财政年份:
    1995
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Pressure Sintering of beta-FeSi_2 with highly Efficient Thermoelectric Properties
高效热电性能β-FeSi_2的压力烧结研究
  • 批准号:
    06555266
  • 财政年份:
    1994
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Study on Fabrication of Intense Fluorescent Oxides doped with Rare Earths
稀土掺杂强荧光氧化物的制备研究
  • 批准号:
    05453073
  • 财政年份:
    1993
  • 资助金额:
    $ 8.7万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
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