国家/地区 中国（3）
IPC部 C（3）
IPC大类 C08（3）
IPC小类 C09K（3）
IPC
发明人 ZHANG C（3）
公开年 2021（2）
申请年 2021（3）
专利权人

Preparing light-emitting diode packaging material for emitting white light under excitation of deep ultraviolet light, involves uniformly mixing blue and yellow nitrogen-doped graphene/carbon quantum dots in epoxy resin solution.

LIN J, WANG L, WU X, DU H, CAI X, WEI X, FAN J, YIN X, ZHANG C, LIN T

Ultra-high temperature modified polymer cementing fluid loss reducing agent useful in e.g. deep well ultra-deep well, comprises graphene oxide, initiator, 2-acrylamido-2-methylpropanesulfonic acid, unsaturated amide, unsaturated carboxylic acid, and water.

ZHANG S, DING Z, ZHOU C, LV B, SHEN J, LIU Z, ZHANG C, LIU H, ZHANG H, XU M, QI F, LIU S, JIN J, XU P, YU Y, XIA X

Temperature-responsive cementing slurry comprises oil well cement, bidirectional intelligent temperature control material, mixing water, dispersant, and fluid loss agent.

HUO J, CHE Y, ZHANG C, LIU H, ZUO W, YU B