A composition, comprising: a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 82 m, the primary particles include substantially spherical particles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles, and wherein a particle size distribution of secondary particles has multiple peaks, an apex of a peak on a side of smallest particle sizes is 90 µm or less, and a content rate thereof is at least 10 wt % of all the gallium nitride particles.

A composition, comprising: a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 82 m, the primary particles include substantially spherical particles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles, and wherein a particle size distribution of secondary particles has multiple peaks, an apex of a peak on a side of smallest particle sizes is 90 µm or less, and a content rate thereof is at least 10 wt % of all the gallium nitride particles.

A composition, comprising: a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 82 m, the primary particles include substantially spherical particles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles, and wherein a particle size distribution of secondary particles has multiple peaks, an apex of a peak on a side of smallest particle sizes is 90 µm or less, and a content rate thereof is at least 10 wt % of all the gallium nitride particles.

A composition, comprising: a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 µm, the primary particles include substantially spherical par-ticles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, and wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles.

A method for producing a composition, the method comprising: performing a nitriding process that reacts a mixed powder of gallium oxide and gallium nitride at a temperature of from 1000° C. to 1100° C. for at least 3 hours such that an ammonia reaction amount per hour is 1 or more times an amount by mole of gallium charged, wherein the composition comprises a plurality of gallium nitride particles including primary particles, wherein an oxygen content is 1 atm % or less, an average particle size of the primary particles is at least 5 82 m, the primary particles include substantially spherical particles, and a particle size of a range of 10 area % from smallest particles of a particle size distribution is 3 µm or less, wherein gallium nitride particles that have substantially spherical shapes are from 25 area % to 43.9 area % of all the gallium nitride particles, and wherein a particle size distribution of secondary particles has multiple peaks, an apex of a peak on a side of smallest particle sizes is 90 µm or less, and a content rate thereof is at least 10 wt % of all the gallium nitride particles.