Grain refinement:

Under the effect of microwave electromagnetic energy. Materials will produce a series of ” microwave effect” , the material inside the molecular kinetic energy increases. Diffusion coefficient increased. Sintering activation energy decreases. Accelerate the sintering process. Shortened sintering cycle. Makes grain grow too late was sintered to obtain a uniform fine grain . and the porosity of the small pore material is more rounded shape than the conventional sintering of the material having more excellent mechanical properties. Because microwave sintering grain growth inhibiting effect. For the preparation of nanomaterials provides a potentially viable and efficient way.

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