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Porous ceramics for anti-heat island effect were prepared from mixtures of allophane and vermiculite (VA samples). Allophane and vermiculite which had been ground for 0.5–2h was mixed in various mass ratios, formed into pellets by uniaxial pressing at 40MPa, and heated at 600–800°C to form porous ceramics. The large thermal expansion of the vermiculite upon explosive dehydration of interlayer water...
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