Thermally-conductive composition and method for manufacturing the same

A method for producing a thermally-conductive composition, the method comprising:

• providing a functional agent comprising at least one of boron nitride (BN), silicon carbide (SiC), aluminum oxide (Al2O3), and aluminum nitride (AlN), and foamed inorganic thermally-conductive powders;
• providing a binder;
• and
• mixing the functional agent into the binder,
• wherein providing the binder comprises:
• adding formic acid or acetic acid to distilled water to form a first mixture;
• adjusting pH of the first mixture to 4.3 to 4.5;
• stirring the first mixture;
• adding a silicate glass solution to the first mixture to form a second mixture;
• adding silane (SiH4) to the second mixture 4 to 10 times to form a third mixture;
• stirring the third mixture for 2 to 4 hours;
• aging the third mixture at room temperature for 4 to 12 hours;
• and
• adding isopropyl alcohol to the third mixture and stopping reaction therein,
• wherein providing the foamed inorganic thermally-conductive powders includes:
• producing a first composition containing 100 wt % of distilled water, 4 to 9% by weight of a base liquid containing nitric acid (HNO3) and magnesium (Mg), 14 to 21% by weight of sodium oxide (Na2O), 45 to 56% by weight of silicon dioxide (SiO2), 0.03 to 0.07% by weight of iron oxide (Fe2O3), 0.3 to 0.9% by weight of a dispersant, 1.6 to 5.2% by weight of magnesium carbonate (MgCO3), and 3 to 9% by weight of potassium methyl siliconate;
• adding silicon (Si) to the first composition to obtain a second composition;
• and
• coagulating, foaming and pulverizing the second composition.