Composite material
Mechanical strength of a composite material is enhanced by a simple process. In a composite material comprising a resin or a rubber and an oxide glass, the resin or the rubber is dispersed in the oxide glass, or the oxide glass is dispersed in the resin or the rubber. The composite material has a function that the oxide glass is softened and fluidized by electromagnetic waves.
1. A composite material comprising:
a resin or a rubber;
and a glass oxide dispersed in the resin or the rubber, wherein the composite material is irradiated with electromagnetic waves, causing selective softening and fluidizing of the oxide glass within the composite material to chemically bond the glass oxide with the resin or the rubber,
wherein the glass oxide comprises an element capable of absorbing the electromagnetic waves and has a wavelength transmittance that is at least 20% smaller than a wavelength transmittance of the resin or rubber,
wherein the glass oxide is not pretreated prior to being dispersed in the resin or the rubber, and
wherein a heat decomposition temperature of the resin or the rubber is at least +100° C. more than a transition point of the glass oxide.
2. The composite material according to claim 1 , wherein the electromagnetic waves are a laser at a wavelength of 400 to 3000 nm.
3. The composite material according to claim 1 , wherein the electromagnetic waves are microwaves at a wavelength of 0.1 to 1000 mm.
4. The composite material according to claim 1 , wherein the oxide glass contains a transition metal element and has a transition point of 330° C. or lower.
5. The composite material according to claim 4 , wherein the transition metal element includes V.
6. The composite material according to claim 4 , wherein the oxide glass satisfies
V2O5>TeO2≧P2O5 (mass %); or
Ag2O>TeO2≧P2O5 (mass %) in a state of oxides and, further, a total in the state of the oxides is 70 mass % or more and 95 mass % or less.
7. The composite material according to claim 4 , wherein the oxide glass contains one or more of elements of Fe, Ba, K, W, Mo, Mn, Sb, and Bi.
8. The composite material according to claim 4 , wherein the oxide glass comprises 35 to 55 mass % of V205, 15 to 35 mass % of TeO2, 4 to 20 mass % of P2O5, 5 to 15 mass % of Fe2O3+Sb2O3 in total, and 5 to 30 mass % of one or more of Fe2O3, BaO, K2O, WO3, MoO3, MnO2, Sb2O3, and Bi2O3 in terms of oxides conversion.
9. A coating material containing the composite material according to claim 1 and an organic solvent.
10. A glass fiber reinforced resin in which the composite material according to claim 1 and glass fibers are composited.
11. An electro conductive package comprising the composite material according to claim 1 .
12. A blade for wind power generation having the glass fiber reinforced resin according to claim 10 .
13. The composite material according to claim 1 , wherein the composite material comprises glass oxide in an amount between 30%-60% by volume of the composite material and the resin or rubber in an amount between 40%-70% by volume of the composite material.