STRONTIUM TELLURITE
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STRONTIUM TELLURITE 속성
안전
기존화학 물질 | KE-32253 |
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STRONTIUM TELLURITE C화학적 특성, 용도, 생산
개요
Strontium tellurite has the molecular weight of 215.6761 g/mol and the molecular formula of SrTeO3. It can be formed via the solid-state reaction:SrO+ TeO2+ heat ? SrTeO3
An inert atmosphere is required. This salt is a metatellurite. If a solution method is used, a monohydrate is formed:
SrCl2+ Na2TeO3 ? SrTeO3·H2O+ 2NaCl
Additionally, this compound can be prepared by reacting tellurium dichloride in a solution of strontium chloride:
SrCl2+ 2TeCl2+ 3H2O ? Te+ SrTeO3·H2O+ 6HCl
물리적 성질
In all cases involving solution chemistry, the product is a monohydrate. Its CAS number is 13812-57-2 and its molecular weight is 233.6915 g/mol. Strontium tellurite (SrTeO3) has been shown by Yamada and Iwasaki (1972) to possess ferroelectric properties (ferroelectric = a substance exhibiting permanent electric polarization that varies in strength with the applied electric field).The crystal structure of strontium tellurite, SrTeO3, has been determined at roomtemperature using X-ray diffraction data obtained from single crystals grown by the Czochralski method. Selection of a noncentrosymmetric (C2) structure model was confirmed by the second harmonic generation (SHG) test. The structure of strontiumtellurite is built up of three types of distorted [SrOx] polyhedra (x=6, 7 and 8) that share their oxygen anions with TeO3 pyramidal units. These main anionic polyhedra are responsible for establishing two types of tunnels required for the electron lone pairs of the Te4+ cation.
In another systematic investigation of strontium tellurite, SrTeO3, with particular emphasis on crystal chemistry and phase transitions, the structure of the γ-phase has been determined at 583 K using a single-crystal analysis. Both structural and nonlinear optical measurements indicate a β?γ first-order phase transition temperature that is close to 563 K. The structure of the γ-phase is monoclinic (C2) and does not differ essentially from the a-phase (C2). Comparison of the α and γ structures shows that the main atomic shifts and tilting are connected with Te4, Te5 and Te6 pyramids.
제조 방법
Aluminate sodalites containing the telluride and tellurite ions have been synthesized for the first time. The structures of Sr8[AlO2]12(TeO3)2 and its reduced product Sr[AlO2]12Te2 have been determined using Rietveld refinement of powder neutron-diffraction (PND) data. In Sr8[AlO2]12Te2, the anion occupies a position at the sodalite cage center, while in Sr8[AlO2]12(TeO3)2 the larger tellurite ion is displaced to allow reasonable coordination to the strontium ions.Sr1-x PbxTeO3 (0 < x < 0.2) and Sr1-xLa2xTe1+2xO3+6x (0 < x < 0.15) solid solutions are synthesized (the latter, for the first time), and their properties are studied. The results demonstrate that partial substitutions of Pb and La for Sr extend the temperature stability range of ferroelectric SrTeO3.
Although a number of research papers have been published, its usage in industry is miniscule. It is, however, available commercially by several manufacturers.
STRONTIUM TELLURITE 준비 용품 및 원자재
원자재
준비 용품
STRONTIUM TELLURITE 공급 업체
글로벌( 4)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
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Hubei Jusheng Technology Co.,Ltd. | 18871490254 |
linda@hubeijusheng.com | CHINA | 28180 | 58 |
STRONTIUM TELLURITE 관련 검색:
TELLURIC ACID
STRONTIUM TELLURIDE
Hydrogen telluride
CALCIUM TELLURIDE, 99.99%
STRONTIUM TELLURATE
BARIUM TELLURIDE
Tellurous acid
CALCIUM TELLURATE, CATEO4
Beryllium tellurate
MAGNESIUM TELLURIDE
Magnesium Tellurate
Beryllium Tellurite
Telluric acid (H2teo4), barium salt (1:1)
Magnesium Tellurite
Radium Tellurite
Barium Tellurite
dihydrogen trioxotellurate
STRONTIUM TELLURITE