Lithium disilicate

Lithium disilicate
Names
IUPAC name Lithium disilicate
Identifiers
CAS Number	66402-68-4^[1]
3D model (JSmol)	Interactive image
EC Number	266-340-9
PubChem CID	101943115
InChI InChI=1S/2Li.O5Si2/c;;1-6(2)5-7(3)4/q2*+1;-2 Key: WVMPCBWWBLZKPD-UHFFFAOYSA-N
SMILES [Li+].[Li+].[O-][Si](=O)O[Si](=O)[O-]
Properties
Chemical formula	Li₂O₅Si₂
Molar mass	150.04 g·mol⁻¹
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Lithium disilicate (Li₂Si₂O₅) is a chemical compound that is a glass ceramic. It is widely used as a dental ceramic due to its strength, machinability and translucency.

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Lithium disilicate has found applications in dentistry as a dental ceramic material for dental restorations such as crowns, bridges, and veneers in the form of Li₂Si₂O₅. Lithium disilicate has an unusual microstructure that consists of many randomly oriented small and interlocking plate-like needle-like crystals. This structure causes cracks to be deflected, blunted, and/or to branch, which prevents cracks from growing.^[2] Lithium disilicate has a biaxial flexible strength in the range of 360 MPa to 400 MPa; in comparison, for metal ceramics this is around 80 to 100 MPa, for veneered zirconia it is approximately 100 MPa, and for leucite glass ceramic it is approximately 150 to 160 MPa. It has high hardness (5.92 +/- 0.18 GPa) and fracture toughness (3.3 +/- 0.14 MPa m^1/2). In addition, it can be made to have an appearance that very closely resembles that of natural human teeth.

Lithium disilicate is also used as a non-conductive seal, enamel or feed-through insulator in nickel superalloys or stainless steel, as it has a high thermal expansion.^[3]^[4]

References

^ Ivoclar Vivadent AG (8 November 2012). "Safety data sheet" (PDF). Retrieved 2 March 2020.
^ Shenoy A, Shenoy N (2010). "Dental ceramics: An update". J Conserv Dent. 13 (4): 195–203. doi:10.4103/0972-0707.73379. PMC 3010023. PMID 21217946.
^ Holand, Wolfram; Beall, George H. (2019). Glass-Ceramic Technology. John Wiley & Sons. ISBN 978-1-119-42369-0.
^ Dai, Steve (September 2015). "Reduction-oxidation Enabled Glass-ceramics to Stainless Steel Bonding Part I: screening of doping oxidants". Sandia Journal Manuscript; Not Yet Accepted for Publication. OSTI. Retrieved 2 March 2020.

v t e Lithium compounds (list)
Inorganic (list)	Li₂ LiAlCl₄ Li_1+xAl_xGe_2−x(PO₄)₃ LiAlH₄ LiAlO₂ <span class="nowrap">LiAl<sub>1+x</sub>Ti<sub>2−x</sub>(PO<sub>4</sub>)<sub>3</sub></span> LiAs LiAsF<sub>6</sub> Li<sub>3</sub>AsO<sub>4</sub> <span class="nowrap">Li[AuCl<sub>4</sub></span>] LiB(C<sub>2</sub>O<sub>4</sub>)<sub>2</sub> LiB(C₆F₅)₄ LiBF₄ LiBH₄ LiBO₂ LiB₃O₅ Li₂B₄O₇ <span class="nowrap">Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>·5H<sub>2</sub>O</span> LiBSi<sub>2</sub> LiBr <span class="nowrap">LiBr·2H<sub>2</sub>O</span> LiBrO LiBrO<sub>2</sub> LiBrO<sub>3</sub> LiBrO<sub>4</sub> Li₂C₂ LiCF₃SO₃ CH₃CH(OH)COOLi LiC<sub>2</sub>H<sub>2</sub>ClO<sub>2</sub> LiC<sub>2</sub>H<sub>3</sub>IO<sub>2</sub> Li(CH<sub>3</sub>)<sub>2</sub>N LiCHO<sub>2</sub> LiCH₃O LiC<sub>2</sub>H<sub>5</sub>O LiCN Li<sub>2</sub>CN<sub>2</sub> LiCNO Li₂CO₃ Li₂C₂O₄ LiCl LiClO LiFO LiClO<sub>2</sub> LiClO₃ LiClO₄ LiCoO₂ Li<sub>2</sub>CrO<sub>4</sub> <span class="nowrap">Li<sub>2</sub>CrO<sub>4</sub>·2H<sub>2</sub>O</span> Li<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> CsLiB₆O₁₀ LiD LiF Li<sub>2</sub>F LiF<sub>4</sub>Al Li<sub>3</sub>F<sub>6</sub>Al FLiBe LiFePO₄ FLiNaK LiGaH₄ Li₂GeF₆ Li<sub>2</sub>GeO<sub>3</sub> LiGe<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> LiH LiH<sub>2</sub>AsO<sub>4</sub> Li<sub>2</sub>HAsO<sub>4</sub> LiHCO₃ Li<sub>3</sub>H(CO<sub>3</sub>)<sub>2</sub> LiH<sub>2</sub>PO<sub>3</sub> LiH<sub>2</sub>PO<sub>4</sub> LiHSO<sub>3</sub> LiHSO<sub>4</sub> LiHe LiI LiAt LiIO LiIO<sub>2</sub> LiIO₃ LiIO₄ Li₂IrO₃ Li₇La₃Zr₂O₁₂ <span class="nowrap">LiMn<sub>2</sub>O<sub>4</sub></span> Li₂MoO₄ Li_0.9Mo₆O₁₇ LiN₃ Li₃N LiNH₂ Li₂NH LiNO₂ LiNO₃ <span class="nowrap">LiNO<sub>3</sub>·H<sub>2</sub>O</span> Li<sub>2</sub>N<sub>2</sub>O<sub>2</sub> LiNa Li<sub>2</sub>NaPO<sub>3</sub> LiNaNO₂ LiNbO₃ Li<sub>2</sub>NbO<sub>3</sub> LiO⁻ LiO<sub>3</sub> LiO₂ Li₂O Li₂O₂ LiOH Li₃P LiPF₆ Li<sub>3</sub>PO<sub>4</sub> Li<sub>2</sub>HPO<sub>3</sub> Li<sub>2</sub>HPO<sub>4</sub> Li<sub>3</sub>PO<sub>3</sub> Li<sub>3</sub>PO<sub>4</sub> Li₂Po Li₂PtO₃ Li₂RuO₃ Li₂S LiSCN LiSH LiSO<sub>3</sub>F Li₂SO₃ Li₂SO₄ Li[SbF<sub>6</sub>] Li₂Se Li<sub>2</sub>SeO<sub>3</sub> Li<sub>2</sub>SeO<sub>4</sub> LiSi Li<sub>2</sub>SiF<sub>6</sub> Li₄SiO₄ Li₂SiO₃ Li₂Si₂O₅ LiTaO₃ Li₂Te LiTe₃ Li₂TeO₃ Li<sub>2</sub>TeO<sub>4</sub> Li₂TiO₃ <span class="nowrap">Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub></span> <span class="nowrap">LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub></span> <span class="nowrap">LiVO<sub>3</sub>·2H<sub>2</sub>O</span> Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> Li₂WO₄ LiYF₄ Neodymium-doped <span class="nowrap">LiZr<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub></span> Li<sub>2</sub>ZrO<sub>3</sub>
Organic (soaps)	Hemolithin (extraterrestrial protein) Organolithium reagents Gilman reagent CH₃COOLi C₄H₆LiNO₄ LiC₂F₆NO₄S₂ LiN(SiMe₃)₂ Li₃C₆H₅O₇ C₅H₅Li LiN(C₃H₇)₂ (C₆H₅)₂PLi C₁₈H₃₅LiO₃ C₆H₁₃Li C₄H₉Li CH₃CHLiCH₂CH₃ (CH₃)₃CLi C₁₂H₂₈BLi CH₃Li Li⁺C₁₀H₈⁻ C₅H₁₁Li C₅H₃LiN₂O₄ C₆H₅Li LiC₂CH₃ LiO₂C(CH₂)₁₆CH₃ C₄H₅LiO₄ LiEt₃BH LiOC(CH₃)₃ C₉H₁₈LiN LiC₂H₃ Vinyllithium LiC ₁₁H ₂₃COO
Minerals	Amblygonite Berezanskite Brannockite Cryolithionite Darapiosite Darrellhenryite Elbaite Fluorine Elbaite Fluor-liddicoatite Emeleusite Eucryptite LiAlSiO₄ Faizievite Hectorite Hsianghualite Jadarite LiNaSiB₃O₇OH Keatite Li(AlSi₂O₆) Kunzite Lavinskyite Lepidolite Lithiophilite LiMnPO₄ Lithiophosphate Li₃PO₄ Manandonite Manganoneptunite Nambulite Neptunite Olympite Petalite LiAlSi₄0₁₀ Pezzottaite Cs(Be₂Li)Al₂Si₆O₁₈ Rossmanite Saliotite Sogdianite Spodumene LiAl(SiO₃)₂ Sugilite Tiptopite Tourmaline Triphylite LiFePO₄ Zabuyelite Li₂CO₃ Zektzerite Zinnwaldite
Hypothetical	Li_xBe_y HLiHe<sup>+</sup> LiFHeO LiHe<sub>2</sub> (HeO)(LiF)<sub>2</sub> La_2/3-xLi_3xTiO₃He
Other Li-related	Aluminium–lithium alloys Heteroatom-promoted lateral lithiation LB buffer Lithium atom Lithium medication LiNi_xCo_yAl_zO₂ LiNi_xMn_yCo_zO₂ Lithium soap Lithium Triangle Lucifer yellow Magnesium–lithium alloys NASICON

This page was last edited on 3 December 2023, at 03:13

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