<trans-title xml:lang="en">Preparation and properties of spodumene/silicon carbide composite ceramic materials</trans-title>

Yuan-Yuan Lu; Gui-Hua Lu; Heng-Wei Zhou; Yi-Neng Huang

doi:10.7498/aps.69.20200232

Acta Physica Sinica, Volume. 69, Issue 11, 117701-1(2020)

Preparation and properties of spodumene/silicon carbide composite ceramic materials

Yuan-Yuan Lu¹, Gui-Hua Lu¹, Heng-Wei Zhou^1、*, and Yi-Neng Huang^1,2、*

¹Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, College of Physical Science and Technology, Yili Normal University, Yining 835000, China

²National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China

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Figures & Tables(10)

Fig. 1. XRD patterns of β-spodumene: (a) β-LiAlSi₂O₆; (b) ICSD No. 01-071-2058

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Fig. 2. XRD patterns of spodumene/silicon carbide composi-tes.

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Fig. 3. XRD patterns of 40SP sample in the starting and the sintered at 1550 ℃.

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$SEM micrographs of the fracture surface of spodumene/silicon composites: (a) 25SP; (b) 30SP; (c) 35SP; (d) 40SP.$

Fig. 4. SEM micrographs of the fracture surface of spodumene/silicon composites: (a) 25SP; (b) 30SP; (c) 35SP; (d) 40SP.

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Fig. 5. Apparent porosity and Young’s modulus of the spodumene/silicon carbide composites.

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Fig. 6. Expansion versus temperature of the spodumene/sili-con carbide composites.

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Fig. 7. Microcrack of 35 SP composite.

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Table 1. Average linear thermal expansion coefficient (CET) of some important materials based on LAS system.

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Table 1. Average linear thermal expansion coefficient (CET) of some important materials based on LAS system.

System/material	CET/10^–6 ℃^–1	Temperature range/℃
Li₂O·Al₂O₃·2SiO₂ (LiAlSiO₄, Eucryptite)	–6.2	25—800
Li₂O·Al₂O₃·3SiO₂ (Solid solution of eucryptite)	Negative near zero CET	25—1000
Li₂O·Al₂O₃·4SiO₂ (β-LiAlSi₂O₆, β-Spodumene)	0.9	25—1000
Li₂O·Al₂O₃·6SiO₂ (LiAlSi₃O₈, Virgilite)	0.5	25—1000
Li₂O·Al₂O₃·8SiO₂ (LiAlSi₄O₁₀, Petalite)	0.3	25—1000
Li₂O·Al₂O₃·10SiO₂	0.5	25—1000
LAS + TiO₂ (Pyroceram)	–0.07—0.30
LAS + TiO₂ + ZrO₂ (Cer-Vit)	0.05—0.30
Hercuvit (LAS-based transparentlow expanding glass-ceramic)	0—0.3

Table 2.
The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.
四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

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Table 2.
The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.
四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

Phase	Si, Al—O/Å	Li—O/ Å	Si, Al—Li/Å	O—O (Li tetrahedra)/Å	O—O (Si, Al tetrahedra)/Å	V/Å³	D_c/g·cm^–3
Te-SP	1.643	2.081	2.628/2.710	3.339	2.682	520.671	2.374
He-SP	1.641	2.068	2.609	3.337	2.679	128.790	2.399

Table 3.
Characteristics of spodumene/ silicon carbide composites.
锂辉石/碳化硅复相陶瓷材料的性能

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Table 3.
Characteristics of spodumene/ silicon carbide composites.
锂辉石/碳化硅复相陶瓷材料的性能

β–Spodumene content/ mass%	Apparent porosity/ %	Bulk density/ g·cm^–3	Young’s modulus/ GPa	α (–150—25 ℃)/ ℃^–1	α (25—480 ℃)/ ℃^–1
SP25	38	1.81	95.3 ± 0.1	0.23 × 10^–6	1.83 × 10^–6
SP30	32	1.82	123.8 ± 0.4	0.60 × 10^–6	2.95 × 10^–6
SP35	19	2.24	204.2 ± 0.5	0.53 × 10^–6	5.71 × 10^–6
SP40	29	1.95	119.6 ± 0.5	1.14 × 10^–6	2.50 × 10^–6

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Yuan-Yuan Lu, Gui-Hua Lu, Heng-Wei Zhou, Yi-Neng Huang. Preparation and properties of spodumene/silicon carbide composite ceramic materials[J]. Acta Physica Sinica, 2020, 69(11): 117701-1

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Paper Information

Category:

Received: Feb. 18, 2020

Accepted: --

Published Online: Dec. 2, 2020

The Author Email: Huang Yi-Neng (ynhuang@nju.edu.cn)

DOI:10.7498/aps.69.20200232

Topics

Nuclear physics

Particles and fields

Particle and nuclear astrophysics and cosmology

Table 1. Average linear thermal expansion coefficient (CET) of some important materials based on LAS system.

Table 1. Average linear thermal expansion coefficient (CET) of some important materials based on LAS system.

Table 2. The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

Table 2. The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

Table 3. Characteristics of spodumene/ silicon carbide composites.锂辉石/碳化硅复相陶瓷材料的性能

Table 3. Characteristics of spodumene/ silicon carbide composites.锂辉石/碳化硅复相陶瓷材料的性能

Table 2.
The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.
四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

Table 2.
The atomic bond lengths, cell volume and density of tetragonal and hexagonal spodumene.
四方相β-锂辉石和六方相锂辉石原子键长、晶胞体积和密度

Table 3.
Characteristics of spodumene/ silicon carbide composites.
锂辉石/碳化硅复相陶瓷材料的性能

Table 3.
Characteristics of spodumene/ silicon carbide composites.
锂辉石/碳化硅复相陶瓷材料的性能