| 摘要 |
A mineral flaky filler for composites, produced by melting a starting mineral, shaping hard flaky vitreous particles from the melt, and subjecting such particles to thermochemical treatment in an oxidizing atmosphere until a crystal phase is developed. With an object of obtaining such a crystallinity-reactivity balance that would provide for quality consistant protective and ornamental coatings on large-size articles and structures preferably for use in the tropical climate and of producing a filler that would be commercially available at the step of the thermochemical treatment the flaky particles were treated at a temperature range of 680 to 850 DEG C until at least 12 % by weight of the crystal phase and at least 7x10<19>spin/cm<3> of reactive paramagnetic centers were developed, and followed by air cooling.
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