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陶瓷微珠具有质轻、导热系数低的特点,目前主要应用于建筑反射隔热涂料中,采用热线法导热系数仪测试其导热系数为0.0350W/(m·K),比玻化微珠和膨胀珍珠岩导热系数低20%~30%,干密度为78kg/m~3,有利于制备轻质高强、保温性能好的保温砂浆。为降低保温砂浆的导热系数,通过复掺少量陶瓷微珠和聚苯颗粒,制备的保温砂浆的干密度为228kg/m~3,28d抗压强度为0.4MPa,导热系数为0.060W/(m·K),除干密度稍偏高外,其它主要性能指标满足GB/T 10303—2001《膨胀珍珠岩绝热制品》中200号优等品标准要求。
Ceramic beads have the characteristics of light weight and low thermal conductivity. At present, they are mainly used in architectural reflective insulation coatings. The thermal conductivity of the ceramic beads is 0.0350 W / (m · K) The thermal conductivity of expanded perlite is 20% ~ 30% lower and the dry density is 78kg / m ~ 3, which is good for the preparation of lightweight mortar with high strength and good thermal insulation properties. In order to reduce the thermal conductivity of thermal insulation mortar, the dry density of thermal insulation mortar prepared by compounding a small amount of ceramic beads and polyphenyl particles is 228kg / m ~ 3, the compressive strength is 0.4MPa at 28d, the thermal conductivity is 0.060W / (m · K), in addition to the slightly higher dry density, the other major performance indicators to meet the GB / T 10303-2001 “expanded perlite thermal insulation products” in the No. 200 premium standard requirements.