Sound-absorbing material block, method for preparing the same and its application

A sound-absorbing material block, comprising three-dimensional open-cell foam, sound-absorbing material powder, a binder, a gel, and a cross-linking agent;

• wherein the sound-absorbing material powder is bonded to each other and connected to the three-dimensional open-cell foam by means of the gel, the cross-linking agent, and the binder, by mass of the sound-absorbing material powder, the gel accounts for 1 wt % to 5 wt % of the sound-absorbing material powder, and the binder accounts for 1 wt % to 8 wt % of the sound-absorbing material powder, and by mass of the gel, the cross-linking agent accounts for 1 wt % to 10 wt % of the gel;
• wherein the sound-absorbing material powder is a zeolite material consisting of one or more of an MFI molecular sieve, an MEL molecular sieve, and an FER molecular sieve with Si/Al ratios greater than 100 and a particle size less than 10 μm;
• wherein the cross-linking agent is one or more of N,N′-methylene diacrylamide, boric acid, calcium chloride, and aluminum chloride.