Patent classifications
C01C3/06
Low alpha dose barium sulfate particle, and use and process for producing the same
The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less and an alpha dose of 0.07 cph/cm.sup.2 or less.
LOW ALPHA DOSE BARIUM SULFATE PARTICLE, AND USE AND PROCESS FOR PRODUCING THE SAME
The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less and an alpha dose of 0.07 cph/cm.sup.2 or less.
Particulate mixtures for forming polycrystalline compacts and earth-boring tools including polycrystalline compacts having material disposed in interstitial spaces therein
Polycrystalline compacts include smaller and larger hard grains that are interbonded to form a polycrystalline hard material. The larger grains may be at least about 33 times larger than the smaller grains. An interstitial material comprising one or more of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal may be disposed between the grains. The compacts may be used as cutting elements for earth-boring tools such as drill bits, and may be disposed on a substrate. A particulate mixture includes a first plurality of grains of hard material having a coating formed over the grains of hard material. The coating comprises at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal. A second plurality of grains of hard material has a grain size at least 33 times larger than the first plurality.
Particulate mixtures for forming polycrystalline compacts and earth-boring tools including polycrystalline compacts having material disposed in interstitial spaces therein
Polycrystalline compacts include smaller and larger hard grains that are interbonded to form a polycrystalline hard material. The larger grains may be at least about 33 times larger than the smaller grains. An interstitial material comprising one or more of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal may be disposed between the grains. The compacts may be used as cutting elements for earth-boring tools such as drill bits, and may be disposed on a substrate. A particulate mixture includes a first plurality of grains of hard material having a coating formed over the grains of hard material. The coating comprises at least one of a boride, a carbide, a nitride, a metal carbonate, a metal bicarbonate, and a non-catalytic metal. A second plurality of grains of hard material has a grain size at least 33 times larger than the first plurality.