ChemInform Abstract: Crystal Structure of Double Oxoborates LnCa4O(BO3)3 (I) (Ln: Gd, Tb, Lu) and Eu2CaO(BO3)2 (II).

Ilyukhin, A. B.; Dzhurinskii, B. F.

doi:10.1002/chin.199352016

Cited by 7 publications

(12 citation statements)

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“…Different techniques have been applied for ReCOB crystal growth, including the high temperature flux, Bridgman and Cz approaches [47][48][49]. At the early stage of ReCOB crystal studies, the high temperature flux method was adopted for the crystal growth, where the selection of appropriate flux agent (high temperature solvent) is vital, especially for the crystals with incongruent features.…”

Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

“…Among ReCOB crystals (except CeCOB and YbCOB), ErCOB, YCOB, GdCOB, SmCOB, NdCOB, PrCOB and LaCOB are congruent melting compounds, while TbCOB and TmCOB were found to possess a very narrow congruent region. Lead oxide was firstly selected as the flux agent for ReCOB crystal growth, with limited success, where the grown crystals were at centimeter scale [47]. Later, the Bridgman and Cz methods, which are favorable for growing crystals with congruent melting features, were utilized.…”

Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

“…The increase of the piezoelectric coefficient for ReCOB crystals was reported to be associated with the difference of the diameter of rare-earth cations (Re 3+ ) and the disorder distribution of Ca 2+ and Re 3+ ions in ReCOB crystals [34,47]. …”

Section: Rotated Crystal Cuts With Maximized Valuesmentioning

confidence: 99%

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Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Duan

Zhang

et al. 2014

Crystals

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Rare-earth calcium oxyborate crystals, ReCa 4 O(BO 3 ) 3 (ReCOB, Re = Er, Y, Gd, Sm, Nd, Pr, and La ), are potential piezoelectric materials for ultrahigh temperature sensor applications, due to their high electrical resistivity at elevated temperature, high piezoelectric sensitivity and temperature stability. In this paper, different techniques for ReCOB single-crystal growth are introduced, including the Bridgman and Czochralski pulling methods. Crystal orientations and the relationships between the crystallographic and physical axes of the monoclinic ReCOB crystals are discussed. The procedures for dielectric, elastic, electromechanical and piezoelectric property characterization, taking advantage of the impedance method, are presented. In addition, the maximum piezoelectric coefficients for different piezoelectric vibration modes are explored, and the optimized crystal cuts free of piezoelectric cross-talk are obtained by rotation calculations.

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Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

Section: Approaches For Recob Crystal Growthmentioning

confidence: 99%

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Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Duan

Zhang

et al. 2014

Crystals

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“…This crystal family is called oxyborate because not all the oxygen atoms are directly bonded to the boron atoms. Ilyukhin and Dzhurinskii investigated compounds with Re ¼ Gd, Tb, and Lu [29]. One year later, a series of compounds from this family were synthesized by Norrestam et al with Re ¼ La, Nd, Sm, Gd, Er, and Y [28].…”

Section: Development Of Recob Familymentioning

confidence: 99%

“…The distribution coefficient for Nd in YCOB crystal is near unity. Chai and coworkers also have made effort for blue SFD laser using The structures of RECOB (RE ¼ Lu, Tb, Gd) crystals have been determined by Ilyukhin and Dzhurinskii [29] with tiny single crystals grown from a PbO flux system. The maximum Nd substitution is estimated to be about 20%.…”

Section: Self-frequency Doublingmentioning

confidence: 99%

Other Borate Crystals

Chen

Sasaki

et al. 2012

Nonlinear Optical Borate Crystals

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A series of mixed borates of rare-earth elements and calcium with the composition R 2 CaB 10 O 19 (RCB) (R: rare-earth element) were synthesized by Wu et al., from the system of R 2 O 3 -CaO-B 2 O 3 in 1998 [1]. In 2001, the growth and structure of La 2 CaB 10 O 19 (LCB), one member of the RCB family, was reported [2]. LCB crystallizes in the monoclinic system and belongs to the C2 space group with two formula units per cell (Figure 4.1). Its lattice parameters were measured to be a ¼ 11.043 (3) The structure contains B 5 O 12 groups as the basic units. B 5 O 12 groups are linked together to form an infinite two-dimensional double layer by sharing O atoms with one another. The layer runs almost perpendicular to the caxis of the crystal. The La atoms are located in layers, while the Ca atoms are located between two layers. LCB crystal has a high transparency from ultraviolet (UV) to infrared range. The birefringence of LCB crystal at 1064 nm is 0.053, which allows to perform SHG and THG in LCB. The damage threshold was measured to be about 11.5 GW/cm 2 . An effective nonlinear optical coefficient d eff of LCB was measured to be 1.05 pm/V. In addition, LCB can be doped with other rare earth (RE) elements because of the existence of the La 3þ ions in LCB. So LCB is a promising nonlinear optical (NLO) and self-frequency doubling (SFD) crystal. Synthesis and Crystal Growth of LCB and RE:LCBIn 1998, a series of compounds with the composition R 2 CaB 10 O 19 (R: rare earth) including the LCB crystals were synthesized from the stoichiometric melt. In 2000, the Nd 3þ -doped LCB (Nd:LCB) with a size of 20 Â 17 Â 7 mm 3 was grown from the Nonlinear Optical Borate Crystals: Principles and Applications, First Edition. Nd 3þ was used to replace the La 3þ in LCB using different Nd concentrations to form Nd:LCB. For LCB RE:LCB crystal growth, flux method is convenient because the crystal decomposes above 900 C before melting at 1200 C. In 2002, pure LCB was grown from its stoichiometric melt by the top-seeded pulling method (TSSG, topseeded solution growth) by Xu et al. [4]. The morphology of LCB grown by TSSG method was then studied [5]. In 2003, Wu et al. studied the phase diagram of the binary system LaB 3 O 6 -CaB 4 O 7 by X-ray powder diffraction and differential thermal (DSC) analysis, and they found that LCB phase exists between lanthanum borate and calcium borate, and melts congruently with a melting point of 1065 C [6]. Thereafter, a series of rare earth-doped LCB such as Er:LCB [7,8], Ce:LCB [9], Nd,Yb:LCB [10], and Pr:LCB [11,12] were successfully grown by flux and TSSG method. To further enlarge the size and improve the optical quality of LCB crystals, people made more efforts to improve the crystal growth equipment and the growth conditions. For example, in 2005, Jing et al. made efforts to search for the new flux to grow LCB crystals and successfully grew the LCB with size of 30 Â 25 Â 9 mm from a new flux CaO-Li 2 O-B 2 O 3 [13]. It was also found that the morphological faces are most effected by the direction of ...

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Synthesis and characterization of powder four borate Sr₃Sm₂(BO₃)₄

Cai

2013

Powder Diffr.

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Polycrystalline Sr 3 Sm 2 (BO 3 ) 4 borate has been synthesized through a solid-state reaction, and the title compound is stable in air and water. Its crystal structure was investigated from powder X-ray diffraction data using the Rietveld method. The fundamental building units of the crystal Sr 3 Sm 2 (BO 3 ) 4 are isolated BO 3 anionic groups, distorted Sm-O polyhedra, and irregular Sr-O polyhedra, with the crystal structure isostructural to Sr 3 Nd 2 (BO 3 ) 4 . The infrared spectrum of Sr 3 Sm 2 (BO 3 ) 4 has been measured, which is consistent with the crystallographic study. According to diffuse reflection measurement of Sr 3 Sm 2 (BO 3 ) 4 powders, the absorption edge is in the deep UV range and UV-vis transmittance is very high. Phosphor Sr 3 Sm 2 (BO 3 ) 4 exhibits an orange-red emission.

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ChemInform Abstract: Crystal Structure of Double Oxoborates LnCa4O(BO3)3 (I) (Ln: Gd, Tb, Lu) and Eu2CaO(BO3)2 (II).

Cited by 7 publications

References 0 publications

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Other Borate Crystals

Synthesis and characterization of powder four borate Sr₃Sm₂(BO₃)₄

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ChemInform Abstract: Crystal Structure of Double Oxoborates LnCa4O(BO3)3 (I) (Ln: Gd, Tb, Lu) and Eu2CaO(BO3)2 (II).

Cited by 7 publications

References 0 publications

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Rare-Earth Calcium Oxyborate Piezoelectric Crystals ReCa4O(BO3)3: Growth and Piezoelectric Characterizations

Other Borate Crystals

Synthesis and characterization of powder four borate Sr3Sm2(BO3)4

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Synthesis and characterization of powder four borate Sr₃Sm₂(BO₃)₄