Patent ID: 6337060
Filing Date: 2002-01-08
Classification: C01B

Abstract:
A suspension comprising:single, hydrophilic diamond particles having a chemically modified particle surface produced by an oxidizing medium dispersed in aqueous solution at a pH of 7.0, wherein: at least 90% by weight of said diamond particles having an APS of 1000 or more but less than 2000 nanometers dispersed in said aqueous solution exhibit a suspension holding time of at least 0.5 hours; at least 90% by weight of said diamond particles having an APS of 500 or more but less than 1000 nanometers exhibit a suspension holding time of at least two hours; at least 90% by weight of said diamond particles having an APS of 200 or more but less than 500 nanometers exhibit a suspension holding time of at least eight hours; and at least 90% by weight of said diamond particles having an APS of less than 200 nanometers exhibit a suspension holding time of at least 24 hours.