Setter Mix

Application L446D is a specially developed refractory which, when mixed with small quantities of water and cured, provides an ideal setter material for the firing of ceramic pieces, especially jet engine blade cores. Its special properties are a quick set time and low shrinkage on firing, up to temperatures of 1200°C. After its initial firing, L446D products have an almost linear thermal expansion and contraction curve up to and down from the service temperature on each subsequent firing. L466D can also be used as a filler material for the cavity of some of the larger hollow blade cores.

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Instructions for Use

The recommended water: powder ratio for L446D is 14:100g (lowering the water content reduces the shrinkage further). Mix steadily for about 3 minutes with water at room temperature, then pour material into the mould (if less than 14cc:100g is used vibration may be required to fill the mould, however, too much vibration could cause the material to settle out so care should be taken). The material will start to set within minutes (placing the mould in a warm oven will speed this up). The mould may be stripped after about an hour, although the longer it is left the stronger it will be. The setter should then be dried and fired up to service temperature.

Packaging

Setter Mix L446D is normally supplied as a dry powder in 25kg paper sacks, though alternative packaging can be arranged on request.

The above product information is given in good faith as accurate and reliable but is not to be taken as a guarantee. The figures provided are intended to be a guide to expected average values and should not be interpreted as a specification. Any potential applications referred to are not to be construed as recommendations. It is the responsibility of the user to determine suitability for any specific purpose.