(EP598783-A1)      Article is mfd. by (a) forming a dispersion of particles in a liq. carrier which either (i) has a critical value of viscosity below the level at which gas cannot be introduced, and above the level at which gas tends to escape, or (ii) contains a polymerisable monomeric material, (b) introducing gas into the dispersion and (c) removing the liq. to leave a porous solid.    The dispersion pref. contains 10-90 and esp. 40-85% solids with a particle size of less than 5 micron and esp. less than 2 micron - or the particles are up to 100 micron and agents are present to prevent settling. The bubbles are controlled and maintained by a deflocculent and are introduced by: (i) high speed agitation, (ii) bubbling the gas through a filter while agitating, (iii) forcing high pressure gas through a fine filter, mixing with the dispersion in a chamber and ejecting via a nozzle, (iv) mixing the gas and dispersion in a pressure vessel and ejecting to form a foam or (v) adding an agent to form bubbles in situ. Drying is under reduced pressure.    USE -   The porous articles are useful as catalyst supports, flame supports, gas and other filters, air fresheners, ceramic armour, traps for diesel solids, insulation, humidity sensors, refractory separators and electrolytes for fuel    (JP7501307-W)      Article is mfd. by: (a) forming a dispersion of particles in a liq. carrier which either (i) has a critical value of viscosity below the level at which gas cannot be introduced, and above the level at which gas tends to escape, or (ii) contains a polymerisable monomeric material, (b) introducing gas into the dispersion and (c) removing the liq. to leave a porous solid.    Also claimed are the dispersion with a critical viscosity, a fired porous body contg. only refractory particles and a green body contg. a polymer which is removed on firing.    The dispersion pref. contains 10-90 and esp. 40-85% solids with a particle size of less than 5 micron and esp. less than 2 micron - or the particles are up to 100 micron and agents are present to prevent settling. The bubbles are controlled and maintained by a deflocculent and are introduced by: (i) high speed agitation, (ii) bubbling the gas through a filter while agitating, (iii) forcing high pressure gas through a fine filter, mixing with the dispersion in a chamber and ejecting via a nozzle, (iv) mixing the gas and dispersion in a pressure vessel and ejecting to form a foam or (v) adding an agent to form bubbles in situ. Drying is under reduced pressure.    USE -   The porous articles are useful as catalyst supports, flame supports, gas and other filters, air fresheners, ceramic armour, traps for diesel solids, insulation, humidity sensors, refractory separators and electrolytes for fuel cells.    (EP598783-B1)      A method of making a porous refractory article composed of refractory particles, the method comprising the steps of: (a) forming a dispersion comprising particles in a liquid carrier; (b) introducing gas into the dispersion; and (c) removing the liquid carrier to provide a solid article having pores derived from the bubbles; (d) drying; and (e) firing, characterised in that the dispersion contains a polymerisable monomeric material.    (US5563106-A)      A method of making a porous refractory solid article, the method comprises (a) forming a dispersion comprising particles of a refractory starting material in a liquid carrier; the formed dispersion having a critical viscosity of 25 mPas to about 1000 mPas; (b) introducing gas into the dispersion; and (c) removing the liquid carrier to provide a solid article made of bonded particles of the refractory starting material only and having pores derived from bubbles of the gas.