Doreen Yvonne Hobbs

Title: Doreen Yvonne Hobbs: Innovator in Phosphor Technology

Introduction

Doreen Yvonne Hobbs is a notable inventor based in London, GB. She has made significant contributions to the field of phosphor technology, particularly through her innovative methods of preparing cerium and terbium activated aluminate phosphors. With a total of two patents to her name, Hobbs has established herself as a key figure in her area of expertise.

Latest Patents

Hobbs' latest patents focus on the development of phosphors that exhibit useful fluorescent emission properties. These phosphors comprise aluminates of magnesium, zinc, and/or lithium, which possess a hexagonal or so-called beta-alumina crystal structure. The specific ratios of the constituent elements, such as Mg:Al from 0.01 to 0.5:1, Ce:Al from 0.001 to 0.1:1, and Tb:Al from 0.005:1 to 0.25:1, are crucial for achieving optimal performance. The innovative process she developed allows for the preparation of these aluminate phosphors without the need for extensive milling, thus preserving their emission properties. The source of alumina used in this process is aluminium ammonium sulphate, which is mixed with oxides of other metals and fired at high temperatures.

Career Highlights

Hobbs is currently associated with Thorn Electrical Industries Limited, where she continues to advance her research and development efforts. Her work has not only contributed to the scientific community but has also had practical applications in the lighting industry.

Collaborations

Hobbs has collaborated with various professionals in her field, including her coworker Peter Whitten Ranby. These collaborations have further enriched her research and innovation efforts.

Conclusion

Doreen Yvonne Hobbs is a pioneering inventor whose work in phosphor technology has made a significant impact. Her innovative methods and dedication to her field continue to inspire advancements in fluorescent materials.