Hydrothermal growth of lanthanide vanadate crystals for use in laser and birefringent applications and devices
US7211234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2005 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06C5/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to lanthanide vanadate crystals having the formula LnVO4, wherein Ln is selected from La, Nd, Ce, Pr, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and combinations of at least two thereof, made by a hydrothermal method for a wide variety of end-use applications. The present method requires reacting a source of Ln3+ ions and a source of VO43+ ions, wherein Ln is selected from the group consisting of La, Nd, Ce, Pr, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and combinations of at least two thereof, in an aqueous solution at a temperature of from about 350° C. to about 600° C. and at a pressure of from about 8 kpsi to about 40 kpsi, the aqueous solution comprising hydroxide ions at a concentration of from about 0.01 to about 5 molarity. Specifically, when made by the present hydrothermal method, single crystals of sufficient size for use in a variety of optical applications are readily formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.