Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-treuhand-gesellschaft F. Elektrische Gluehlampen Mbh

Dieter Schmidt

Martin Zachau

Ulrich Mueller

Charles F Chenot

Franz Zwaschka

Wolfram Graser

A process for producing a phosphate of the lanthanoids is described. The process is based on a two-jet precipitation, starting from separate reservoirs of a rare earth salt solution and a phosphate solution which are introduced simultaneously by separate feedlines into an aqueous acidified initial charge with stirring at a pH of 0&#x2266;pH&#x2266;1. After the solutions are added, the pH is raised to a pH of &#x3e;2 to complete the phosphate precipitation.

Process for producing a phosphate of the lanthanoids, and phosphate produced thereby

The high-pressure sodium discharge lamp of low power described here is chcterized by a very high xenon cold filling pressure of at least 1 bar. The pressure ratio to the sodium operating pressures lies between 10 and 30. Luminous efficacies of approximately 100 lm/W and more can be obtained with a lamp power of 50 to 100 W.

High pressure sodium lamp of low power

A barium magnesium aluminate phosphor having improved maintenance and efficiency is provided. The novel phosphor is suitable for use in conventional fluorescent lamp applications and applications utilizing VUV excitation, including Xe excimer lamps and plasma display panels.

Barium magnesium aluminate phosphor

Xenon excimer radiation source with fluorescent materials

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Munich, Germany

Dieter Schmidt