Back to results
US 2020/0392011 A1Published application
Polar Oxysulfide for Nonlinear Optical Applications
AssigneesUniversity of South Carolina, National Institute for Materials Science
InventorsHans-Conrad Zur Loye, Yoshihiro Tsujimoto
Life of this patent
Estimating the term…
Abstract
Single crystals of a new noncentrosymmetric polar oxysulfide SrZn2S2O (s.g. Pmn21) grown in a eutectic KF-KCl flux with unusual wurtzite-like slabs consisting of close-packed corrugated double layers of ZnS3O tetrahedra vertically separated from each other by Sr atoms and methods of making same.
Claims14
A new zinc oxysulfide compound comprising;
- a noncentrosymmetric crystalline structure with chemical formula SrZn2S2O;
- lattice parameters of α=3.87440(10) Å, b=9.9847(3) Å, and c=6.0916(2) Å;
- and
- corrugated double layers of ZnS3O tetrahedra vertically separated by Sr2+ ions.
1 more element
A method for synthesizing the compound SrZn2S2O comprising:
- employing a molten salt method using a eutectic KF-KCl mixture;
- loading a silver tube with 1 mmol of SrO, 1 mmol of Zn, 1 mmol of S, 3.4 mmol of KF, and 4.1 mmol of KCl;
- placing the silver tube in a silica tube that was evacuated to 10−4 Pa and sealed;
- and
- heating the silver tube in a tube furnace to 900° C. at 5° C./min, held for 24 h, and cooled to 600° C. at 0.17° C./min.
2 more elements
A method for solid state synthesis of SrZn2S2O comprising:
- mixing SRO, Zn and S in a stoichiometric ratio in an agate mortar to form a mixture;
- pressing the mixture into a pellet;
- heating the pellet in an evacuated silica tube at 1000° C. for 24 hours;
- and
- sonicating at 1000° C. with water.
2 more elements
Dependencies are inferred from the claim text.