M 235 plus

M235 plus is a doped (ozon-free) material customized in a multi-step production process. M235 plus is developed for special applications where very high quality, regarding homogeneity, bubbles and inclusions is required.

Heraeus applies proprietary multi-step processing that results in a free drawn tube (drawn without the use of a die or mandrel). The resulting lamp has nearly blemish free surfaces, no airlines, a very low bubble content and high homogeneity.

Due to our multi-step production process these tubes are available in a practically unlimited range of diameters and wall thickness.

Multi-step tubes are available in small batch quantities.

zoom

Applications:

projection lamps for SC and LCD stepper
laser excitation
medical

Lamp Types:

ozon free short arc lamps
ozon free long are lamps

Properties of M 235 Plus:

doped
ozone-free
high homogeneity
free of striae

Minimum Order Quantity:
10 kg

Outer Diameter (OD)
OD-Range	Tolerance*
2 – ≤ 8 mm	± 0.3 mm
> 8 – 17 mm	± 0.4 mm
> 17 – ≤ 25 mm	± 0.6 mm
> 25 – ≤ 30 mm	± 0.7 mm
> 30 – ≤ 35 mm	± 0.8 mm
> 35 – ≤ 40 mm	± 1.0 mm
^{*Other dimensions and tolerances on request.}

Wall Thickness (WT)
WT-Range	Tolerance*
≤ 1.2 mm	± 0.2 mm
> 1.2 - 1.8 mm	± 0.3 mm
> 1.8 - 2.4 mm	± 0.4 mm
> 2.4 - 3.0 mm	± 0.5 mm
> 3.0 - 3.6 mm	± 0.6 mm
> 3.6 - 4.2 mm	± 0.7 mm
^{*Other dimensions and tolerances on request.}

Typical chemical impurities (bulk) (ppm, μg/g)										OH content (ppm, μg/g)
Li	Na	K	Mg	Ca	Fe	Cu	Cr	Mn	Al	OH*
1	1	0.1	0.1	0.1	0.2	0.1	0.1	0.05	10	130 - 220
^{*no change in the OH content by the annealing process}

Product Selector

Markets

Applications

Further information

Material Grades Table Contact